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INSTRUCTION
l NSTRUCTION BOOK
BOOK
MODEL
MODEL 63H
63H
INDUCTANCE
INDUCTANCE BRIDGE
BRIDGE
55 kHz
kHz to
to 500
500 kHz
kHz
1-69
BOONTON
ELEaRBNBCS
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P
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O
TEL:
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ROUTE
ROUTE 287
287
W
AT
AT SMITH
S M ~ T H ROAD
ROAD
PARSIPPANY,
PARSIPPANV, N
N . .J,4.- 07054
67054
CONTENTS
TABLE OF CONTENTS
Section
Section 1 . Specifications
Specifications
pti on
Secti
on 11
Section
11 -. Genera
GeneralI Descri
Description
2-1
2- 1
2-2
2- 2
2-3
2-3
2-4
1-1
2-1
...........................................2-1
Bridge
Bridge Circuit ..................................... 2-1
Null
tor ..................................... 2-3
2-3
Null Detee
Detector
Test Signal
2-4
Signal Oscillator •.•••.••••.•..•.••••••••••••.•
.............................. 2-4
General
0
•••••
0
•
•
•
•
•
••
Section
Section 111
1 1 1 -. Operating
Operating Procedure
Procedure
3-1
3-2
3-3
3-3
3-4
3 -4
3-5
3-6
3-1
...........................................3-1
Turn-On Procedure
0............. 3-1
................................
Procedure ...•..............
Measurement
............................. 3-1
Measurement Procedure
Procedure •••••.••.••..••••••.•.•.••••.
Ac Test
tage and
............. 3-10
Test Vol
Voltage
and Current Measurements
Measurements.••••••••.•.•
Appl
ication of Superi
mposed Di
rect Current •..••.••••.••
Application
Superimposed
Direct
.............33-11
.11
Inductance
3-12
................... 3-12
Inductance Standardizing Technique
Technique •••.••.••••.•••••••
General
Geneml
Section
1 V -. Maintenance
Maintenance
Section 1V
4-1
4- 1
4-2
4-2
4-3
4-3
4-11
4-
.................................... 4-1
Voltage
•• . •• •• • •. •• •• .• •. • ••• •• . •• 4-1
Voltage Measurements...
Measurements ..............................
Cal
ibration and
lIator and
Calibration
and Adjustment
Adjustment of Osci
Oscillator
and Tuned
Tuned
........................................
Detector
..
4-4
Detector
4-4
Bridge
Bridge Section
Section Adjustments
Adjustments ••••..•••......•••.••.•••
.......................... 4-5
4-5
CircuitChecks
Circuit Checks .................•.•............... o
0
4-4
4-4
•••••••••••••••••
0
••••••••••••••••••
0
0
LIST
LIST OF
OF FIGURES,
FIGURES. TABLES,
TABLES. AND CHARTS
CHARTS
.
Figure
Figure 11•
.
Figure 3.
3.
Figure
Figure
Figure 2.
2
.
Table 11•
Table
.
Table
Table 2.
2
.
Chart 2.
2.
Chart
Chart 11•
Chart
.
Chart 3.
3
Chart
.
Chart 5.
5.
Chart
Chart 4.
4
Chart
.................
Range of
of Inductance
Inductance Measurement
Measurement ys.
vs . Frequency.......
Frequency ....... 2-2
Range
Circuit for
for Applying
Applying Superimposed
Superimposed DC.
DC ................
Circuit
• • • . • •• • • • • . • •• 3-12
Multiply L/R
L/R Setting
Setting for
for Various
Various Ranges
Ranges of
Multiply
Inductance Measurement...
Measurement ..........................
Inductance
• • •• • • • • • • • • • . • . . • ••••• 3-2
..................3-11
Maximum Dc
Dc Current
Current for
for each
each Range
Range ••...•..•..•••.•••
Maximum
............. 3-5
Maximum J:.c
Ac Test
Test Current,
Current. XO.OOl
XO.OO1 Range
Range ••••.•••
Maximum
.............. 3-6
Maximum Ac
Ac Test
Test Current,
Current. XO.Ol
XO.O1 Range
Range •••..•••
Maximum
................ 3-7
Maximum Ac
Ac Test
Test Current,
Current. XO.l
XO.l Range
Range •••.•••••.•••••.
Maximum
3-8
................. 3-8
Maximum
Ac Test
Test Current,
Current. Xl
X1 Range
Range ••••••••.••.•••••
Maxi
mum Ac
................ 3-9
Maximum
Ac Test
Test Current,
Current. Xl0
XI0 Range
Range •••...••.•••...•
Maxi
mum Ac
...........................PL-l
Table of
of Replaceable
Replaceable Parts
Parts ••••••.••••.••••
PL-1
Table
Simplified Diagram
Diagram of
of the
the Model
Model 63H
63H • ••• . • . •. • •••• • .• 2-2
Simplified
0
0
0
63H
0-169
-1-
••
0
••••
•••••
•••
0
•••
SECTION 1
SPECIFICATIONS
SPEC1FlCATlONS
0.0002 IJH
pH to 11
110
mH in
i n 5 steps
steps as follows:
0.0002
0 mH
Inductance
Inductance Measuring
Measuring Range:
Range :
Multiplier
.
Inductance Range
Range
o to 110 mH
11 mH
o to 1100 IJH
10.0
1.0
o to
0.1
0.01
0.001
o to
o to
110 IJH
11 IJH
Resolution
Resol
uti on of
Inductance
Inductance Reading
Reading
0.01%
0.01%
0.01%
0.01%
0.01%
+ 2.0 IJH
+ 0.2 IJH
+ 0.02 IJH
+ 0.002 IJH
+ 0.0002 IJH
(0.25%
300/C)% + 0.0002
0.0002 IJH
pH
(0.25% + 300/C)%
Inductance
Inductance Measuring
Measuring Accuracy:
Where,
Where,
C
i s the
the resonating
resonating capacitance
capacitance in
i n pF
pF of the
the
C is
test inductor
inductor at
a t the
the freqJency
frecpency of test.
test
0.0002 ohm
ohm to
to 11
11K
K ohms
ohms in
i n 55 ranges
ranges as
as follows:
follows:
0.0002
Series
Series Resistance
Resistance Measuring
Measuring Range:
Range:
Multiplier
Multiplier
10.0
1.0
0.1
0.01
0.001
Series
Series Resistance
Resistance
Range
Range
o to 11 K Q
o to 1100 Q
o to 110 Q
o to
o to
11 Q
1.1 Q
Accuracy
Accuracy
3%
3%
3%
3%
3%
+ 0/25%
+ Q/25%
+ 0/25%
+ 0/25%
+ Q/25%
+ 5.0 Q
+ 0.5 Q
+ 0.05 Q
+ 0.005 Q
+ 0.001 Q
Frequency
Frequency Range:
Range:
55 kHz
Ilator
kHz to
to 500
500 kHz
kHz with
with internal
internal osci
oscillator
and detector.
detector.
and
Frequency
Frequency Accuracy:
Accuracy:
+ 3%
±3%
NOTE :
NOTE:
The accuracy
accuracy of
of the
the test
test frequency
frequency has
has
The
negligible effect
effect on
on the
the accuracy
accuracy of
of the
the
negligible
inductance measurement.
measurement
inductance
.
Approximately 0.5%
0.5% after
after 30
30 minute
minute warm-up.
warm-up.
Approximately
Frequency
Frequency Stability:
Stability:
63H
a-169
1-1
-
.
Maximum AC Test Level:
Level:
Maximum
Approximately 3.0V,
3. OV, rrns,
circuit
rms, open circuit.
Tube Complement:
Quantity
1
1
1
2
1
22
1
1
Power Requirements:
Requi rernents:
Used
In
Used In
Type
Oscillator
Pre-Amplifier
Pre-Ampli fier
Tuned
Tuned Amplifier
Amplifier
Rectifier
Voltage Regulator
Emitter-Follower
Emitter-Fol
Iower
Emitter-Fol
Iower
Emi
tter- Follower
Emitter-Follower
Emi tter-Fol Iower
12AT7
6AK5
6U8
6AU6
6BW4
OA2
2N404A
2N1605A
2N1046
105
105 to 125V,
1 25V, 50-60 Hz,
Hz, 60 watts,
watts, or 210
210
to 250V,
250V, 50-60
50-60 Hz
Hz as specified.
specified.
Size:
10-3/4" h x 11-1/4"
11-1/4" d;
19-1/4" w x 10-3/4"
19-1/4"
case mounted.
d
Mounting:
i s standard.
Case
Case mounting is
for 19-inch rack mounting.
mounting.
Weight:
63H
0-169
.
Approximately
Approxi ma tel y 35 lb.
Ib
1-2
Also available
available
SECTION 11
11
SECTION
GENERAL DESCRIPTION
DESCRIPTION
GENERAL
2-1
2-1
GENERAL
GENERAL
2-1-1
2-1-1
The
Model 63H is a highly advanced bridge which provides direct reading
TheModel63Hisahighlyadvancedbridgewhichprovidesdirectreading
measurements
measurements of
of series
series inductance
inductance down
down to
to low
low values
values with
with fractional
fractional percentage
percentage accuracy,
accuracy,
and
and under
under an
an unusually
unusually broad
broad range
range of
of test
test conditions.
conditions. The
The instrument
instrument also
also provides
provides direct
direct
i s shown
shown
reading measurement
measurement of
of series
series resistance.
resistance. The
The operational
operational range
range of
of the
the Model
Model 63H
63H is
reading
in
i n the
the diagram
diagram on
on page
page 2-2.
2-2.
Inductance
Inductance and
and resistance
resistance ranges
ranges are
are covered
covered in
i n five
five steps;
steps;
i s covered
covered in
i n two
two decades.
decades.
the freq
frequency
range is
the
uency range
2-1-2
2-1 -2
The
The instrument
instrument is
i s completely
completely self-contained,
self-contained, including
including bridge
bridge circuitry,
circuitry,
variable frequency
frequency test
test oscillator
oscillator and
and detector,
detector, null
null indicator,
indicator, and
and power
power supplies.
supplies. It
I t is
is
variable
packaged as
as aa single,
single, compact
compact bench
bench cabinet.
cabinet. The
The Model
Model 63H
63H may
may be
be installed
installed in
i n aa standard
standard
packaged
relay
relay rack
rack when
when the
the cabinet
cabinet is
i s removed.
removed.
2-2
2-2
BRIDGE
BRIDGE CIRCUIT
CIRCUIT
2-2-1
2-2-1
The
The Model
Model 63H
63H embodies
embodies aa modified
modified Maxwell
Maxwell circuit
circuit (see
(see simplified
simplified schematic
schematic
on
on page
page 2-2).
2-2). The
The test
test signal
signal generator
generator and
and null
null detection
detection circuit
circuit are
are coupled
coupled to
to the
the bridge
bridge
by
by aa technique
technique which
which constitutes
constitutes aa particularly
particularly practical
practical approach
approach to
to the
the design
design of
of aa
Maxwell
Maxwell bridge
bridge capable
capable of
of precision
precision measurements
measurements over
over wide
wide ranges
ranges of
of inductance
inductance and
and test
test
frequencies.
frequencies. The
The two
two sides
sides of
of the
the bridge
bridge are
are driven
driven 180
180 degrees
degrees out
out of
of phase
phase by
by aa well
well balanced
balanced
low
This permits
permits detection
detection of
of the
the balance
balance condition
condition by
by coupling
coupling the
the
low impedance
impedance transformer.
transformer. This
detector
detector to
to the
the high
high corners
corners of
of the
the bridge
bridge through
through two
two small,
small, carefully
carefully balanced
balanced capacitors.
capacitors.
2-2-2
2-2-2
i s characteristic
characteristic of
of this
this bridge
bridge circuit
circuit that
that the
the inductance
inductance and
and resistance
resistance
ItI t is
arms
arms act
act independently
independently of
of each
each other.
other. By
By eliminating
eliminating interaction
interaction between
between the
the two
two arms,
arms, the
the
annoyance
i s avoided.
avoided.
annoyance and
and ambiguity
ambiguity of
of false
false or
or sliding
sliding nulls
nulls is
2-2-3
2-2-3
i s of
of the
the non-resonant
non-resonant type,
type, the
the precision
precision of
of frequency
frequency
Since the
the bridge
bridge is
Since
setting
i s not
not critical
critical to
to the
the accuracy
accuracy of
of measurement.
measurement. Bridge
Bridge accuracy
accuracy is
i s determined
determined
setting is
primarily by
by the
the balancing
balancing controls,
controls, the
the precision
precision resistors
resistors in
i n the
the range
range selector,
selector, plus
plus the
the
primarily
63H
a-169
2-1
AC OUTPUT
1
w
VAR OSC.
~ O S C LEVEL
.
4
Figure 11 •.
Figure
Simplified Diagram
Diagram of
of the
the Model
Model 63H
63H
Simplified
10POO
~
2
Ii
1
I--P'::<'''------t----t---7<El----1
X.OOI
.0001 '---~-"'---"......." - - ' - - - - - ' - - - - - '
so
100
ZOo
000
'0
•
Figure 2.
2.
Figure
63H
a-169
KILOCltU5
Range of
of Inductance
Inductance Measurement
Measurement vs.
vs. Frequency
Frequency
Range
2-2
silvered
silvered mica
mica and
and variable
variable air
air capacitors
capacitors comprising
comprising the
the inductance
inductance decades.
decades. All
A l l of
of
0.1%
accuracy.
these components
components are
are adj
adjusted
to better
better than
than O.
these
usted to
1% accuracy.
2-2-4
2-2-4
Great
Great care
care has
has been
been taken
taken in
i n both
both the
the electrical
electrical and
and mechanical
mechanical design
design
of
of the
the Model
Model 63H
63H to
to compensate
compensate or
or eliminate
eliminate the
the sources
sources of
of residual
residual error
error that
that commonly
commonly
restri
ct the
dges operati
ng at
ies.
restrict
the accuracy
accuracy of
of measurement
measurement of
of bri
bridges
operating
at these
these frequenc
frequencies.
2-2-5
2-2-5
The excellent
excel lent scale
scale readability
readability of
of the
the Model
Model 63H
63H allows
allows full
full advantage
advantage
The
to
to be
be taken
taken of
of the
the instrument's
instrument's capability
capability for
for high
high precision
precision and
and resolution.
resolution. The
The
combination
combination of
of the
the outer
outer "counter
"counter dial"
dial" and
and inner
inner 2O-to-:-1
20-to-1 vernier
vernier displays
displays the
the total
total
inductance
This
inductance measuring
measuring range
range across
across aa scale
scale effectively
effectively more
more than
than 200
200 inches
inches long.
long. This
dial
dial arrangement
arrangement also
also assures
assures convenient
convenient rapid
rapid scanning
scanning to
to locate
locate the
the null,
null, as
as well
well as
as
accurate final
final adjustment.
adjustment.
accurate
2-3
2-3
NULL DETECTOR
DETECTOR
NULL
2-3-1
2-3-1
As
As shown
shown in
i n the
the simplified
simplified schematic
schematic diagram
diagram on
on page
page 2-2,the
2-2,the null
nu1l
detector
detector is
i s coupled
coupled to
to the
the bridge
bridge at
a t the
the high
high corners
corners through
through two
two balanced
balanced capacitors.
capacitors.
The
prevents bridge
bridge loading
loading and
and contributes
contributes to
to the
the
The untuned
untuned high
high impedance
impedance preamplifier
preamp1ifier prevents
overall
overall system
system sensitivity.
sensitivity. Adjustment
Adjustment of
o f the
the tuned
tuned detector
detector is
i s independent
independent of
of the
the test
test
signal
signal generator
generator control
control so
so that
that the
the amplifier
amplifier may
may be
be critically
critically tuned
tuned without
without altering
altering the
the
test frequency.
frequency.
test
2-3-2
2-3-2
Frequency
Frequency response
response of
of the
the final
final wide
wide band
band detector
detector amplifier is
i s essentially
essentially
flat
flat over
over the
the total
total frequency
frequency range
range of
of the
the instrument.
instrument. It
I t has
has aa maximum
maximum gain
gain of
of 65
65 dB
dB
for
for aa total
total detector
detector system
system gain
gain of
of approximately
approximately 105
105 dB.
dB.
2-3-3
2-3-3
Output from
from the
the wide
wide band
band amplifier
amplifier is
i s passed
passed through
through aa half-wave
half-wave
Output
detector,
i s further
further enhanced
enhanced by
by use
use
detector, compressed,
compressed, and
and then
then metered.
metered. System
System sensitivity
sensitivity is
of aa 50
50 microampere
microampere taut band
band meter
meter for
for null
null indication.
2-3-4
2-3-4
The
The ac
ac component
component of the
the rectified
rectified output
output from
from the
the wide
wide band
band amplifier
is
i s also
also available
available at
a t aa rear
rear jack for
for connection
connection of
o f an
an oscilloscope
oscilloscope or
or other remote
remote
indicator.
63H
a-169
2-3
2-4
2-4
OSCILLATOR
TEST SIGNAL OSCILLATOR
2-4-1
2-4-1
internal test signal oscillator is
i s continuously adjustable in
i n frequency
The internal
from 5 kHz to 500 kHz. Accuracy of frequency setting
3%. As stated above,
from
setting iiss 3%.
above, iinn this
bridge circuit precision of test frequency setting
i s not directly related to the accuracy of
setting is
measurement.
However, in
more accurate frequency
i n the rare
rare circumstance
circumstance in
i n which more
i s required,
required, the test signal
signal may be
be monitored
monitored with aa counter and set more
more precisely.
adjustment is
precisely.
i s better than 0.5%.
Stability of the test frequency is
005%.
2-4-2
2-4-2
level is
i s continuously adjustable by means
means of aa front panel
The test signal level
panel
and may be
monitored at the test terminals with aa high
high impedance
control and
be monitored
impedance electronic
voltmeter. Maximum
i s 3 volts.
volts. Test current may also be monitored
Maximum open
open circuit level
level is
monitored by
means of aa "clamp-on"
"clamp-on" type
and aa sensitive ac voltmeter.
(See Paragraph
Paragraph 3-4-4)
means
type probe
probe and
voltmeter. (See
3-4-4)
2-4-3
2-4-3
bridge, aa
The test current is
i s independent of the balance condition of the bridge,
fact of considerable importance iinn applications involving
involving such
such components
components as ferrite cores,
cores,
since their permeability varies with the level
level of excitation
excitation current.
current. Were the test current
change from
from the known
level during
during balancing,
meaningful measurements
measurements would be
to change
known level
balancing, meaningful
be impossible.
,
2-4-4
2-4-4
superimposed on the test signal if
i f desired
desired.0 However,
A direct current may
may be
be superimposed
since the dc also flows through the bridge circuit,
circuit, the maximum
maximum levels
indicated for each
levels indicated
range in
i n Tabl
Table
on page
3-1 1 shou
should
exceeded.0 Th
This
exceeding
range
e 2 on
page 3-11
Id not be
be exceeded
is prevents
prevents exceedi
ng the power
imits of
o f the bridge components.
components.
dissipation lIimits
NOTE:
NOTE:
Models having
numbers 634 or higher are equipped
equipped with
having serial numbers
dual-primary power transformer
i s wired either for 117V
aa dual-primary
transformer that is
ac or for 234V ac operation. The
The dual-primary
dual-primary transformer
replaces
replaces two power transformers
transformers (T201
(T201 and T202) used
used in
i n earlier
is
0.6A fuse
fuse iiss supplied when the transformer is
models. A 0.6A
wired for 234V ac operatie>n,
and aa 1 .2A
fuse is
operation, and
..2A fuse
i s supplied when
wheni s wired for 117V
1 17V ac operati
operation.
the transformer
transformer is
on •
./
63H
a-169
2-4
SECTION 111
11 1
SECTION
OPERATI
PROCEDURE
TI NG
NG PROCEDURE
OPERA
3-1
GENERAL
GENERAL
3-1-1
3-1 -1
This section describes
Model 63H
63H
describes in
i n detai
detailI the operating procedure of the Model
Inductance Bridge. All
A l l information required
required for safe and
and proper operation of the instrument
i s included. BE SECTION BEFORE
BEFORE PLACING
PLACING INSTRUMENT INTO
INTO
is
BE
SURE
READ
THIS SECTION
THE INSTRUMENT
-TO
-READ
- THIS
--- - ----
OPERATION.
3-2
3-2
TURN-ON
TURN-ON PROCEDURE
PROCEDURE
Step ~.
a.
Step
-
Before
an appropriate
Before plugging the instrument into an
outlet, make
outlet,
make sure the power source is
i s 105-125
1 05-1 25 volts,
volts,
50-60 Hz,
Hz, unless
unless otherwise specified
specified on
on the
plate.
instrument's identification plate.
Stepb.
-•
Step!:
Plug
the instrument into the power outlet.
Plugtheinstrumentintothepoweroutlet.
c.
Step ~.
ON and
and allow aa warm-up
warm-up period
Set toggle switch to ON
period
of approximately two minutes
minutes (one
(one hour or more
more
after high
high humidity exposure
exposure or after long
long exposure
exposure
.
temperature)
to low temperature).
3-3
3-3
MEASUREMENT
MEASUREMENT PROCEDURE
PROCEDURE
a.
Step
Step ~.
Connect the short circuit plug
plug (or strap) supplied with
the instrument across the TEST binding
binding posts.
PRECAUTION
PRECAUTION
When using
using the XO.OOl
position of the MULTIPLY L
XO.OO1 position
AND
AND R
R BY
BY switch,
switch, the shorting link
l i n k supplied with
used for zeroing
zeroing the bridge;
on
the bridge must be used
. ~he
bric;!ge; on
-
all
plug may
be used.
a l l other ranges
ranges the shorting plug
may be
the shorting plug
plug is
i s used
used for the XO.OOl
XO.OO1 range it
it
may not be
be possible to zero the bridge.
bridge.
63H
0-169
3-1
If
If
Step ~.
Step
b.
X1 or Xl0
XI 0
oscillator
range swi
switch
either
Set osci
"ator range
tch to ei
ther Xl
position, depending upon
required test
position,
upon the required
frequency.
frequency. UJ,;
Use Xl
XI if
i f frequency is
i s below 50 kHz;
otherwise use
Xl00 ~
position.
use XI
o stion.
i
NOTE:
This "Range Selector" also selects
desired range
selects desired
range
Detector. Refer
Refer to page
for the Tuned
Tuned Detector.
page 2-2
2-2 to
determine that both
both frequency and
and inductance
area shown.
fall
boundary area
fa1 l within boundary
For greater
accuracy, refer to accuracy statement
accuracy,
statement on
on
page 1-1
page
1-1.•
Step c.
Step
~.
MUL T1PLY LAND
Set MULTIPLY
L AND R
R BY switch to range
range
recommended
recommended in
i n table for inductance
inductance under test.
(See Table 1 below)
Table 1
Table
r
t
Ii
INDUCTANCE
INDUCTANCE
0.0 to 11
11 fJH
pH
0.0
11.0
110 'fJH
pH
11
.0 to 110
It
1 0
11
0 mH
11 .0
.O to 11
110
,,,,,
-
0.001
I
0.01
I
0.1
j
1
1.0
1 .o
i
110.0
l l 0 0 pfJ H '
110
•0 to 1100
1 .l to 11
11 mH
mH
1•1
,
MULTIPLY
MULTIPLY
LAND
L AND R
R BY
1
10.0
10.0
I
Step ~.
d.
Set both
both SERIES IINDUCTANCE
NDUCTANCE dials to read
read zero and
and
both SERIES RESISTANCE
read zero.
RESISTANCE dials to read
both
Step~.
e.
Step
/
63H
a-169
Set OSC
OSC
LEVEL control
LINE" position.
LEVEL
control to the "RED L1NE"
3-2
NOTE:
NOTE:
The red
red line
line on
on the
the oscillator level
level control
control indicates
indicates
The
approximately one-half
one-half of its
its rotation. This
This is
approximately
is
adequate
adequate for
for most
most measurements.
measurements. If
I f aa higher
higher test
test level
level
is
except
i s desired, it
i t may
may be
be used
used at
at full
full rotation
rotation -except on
on
the
RED LI
NE" position
the XO.OOl
XO.OO1 range
range where
where the"
the "RED
LINE"
position
should
should not
not be
be exceeded.
---
Operating
Operating with
with aa higher
higher
level
level on
on this
this range
range may
may cause
cause overheating of the
the
bridge
bridge resistors
resistors with
with resultant
resultant change
change in
i n bridge
bridge
aC,curacy
accuracy and possible
possible damage
damage to
to components.
Step £..
Step
-f
.
0
Step
Step ,go
g.
-
Set SENSITIVITY
SENSITIVITY control
control to
to maximum.
Set
DETECTOR TUNE
TUNE control
control until
until null
null indicator
Adjust DETECTOR
deflection
deflection is
i s at
a t maximum. To
To avoid
avoid tuning
tuning the
the detector
detector
to
to aa harmonic
harmonic of the
the test
test frequency, the
the detector should
should
be
be tuned
tuned to
to the
the peak
peak which
which occurs
occurs in
i n the
the FARTHEST
FARTHEST
COUNTERCLOCKWISE
POSITION of the
the detector
COUNTERCLOCKWISE POSITION
tuning
tuning knob
knob (the
(the low-frequency
low-frequency end
end of the
the multi-turn
control)
control).•
Step
Step ~
h.
0
Alternately adjust the
the ZERO
ZERO ADJUST
ADJUST (L)
(L) control
control and
and
Alternately
the
the ZERO
ZERO ADJUST
ADJUST (R) controls
controls until
until the
the nuq
null, indicator
deflection
i s at
a t aa minimum
minimum point
point.
deflection is
0
NOTE:
NOTE:
The
The "L
" L ZERO" isi s aa dual
dual ratio
ratio control
control having
having aa full
ful l traverse
traverse
of
o f approximately
approximately 3-1/2
3-1/2 turns. It
It will
w i l l be
be noted
noted that
that for
for
.
about
about 270
270°0 of rotation,
rotation, this
this control
control turns
turns very
very easily.
easily
Beyond
Beyond these
these limits
limits the
the torque
torque requirement
requirement increases
increases
abruptly,
abruptly, indicating
indicating aa shift
shift from
from the
the 36
36 to
to 11 "FINE"
"FINE"
adjustment
When
adjustment to
to the
the 66 to
to 11 "COARSE"
"COARSE" adjustment.
adjustment. When
the
the control
control reaches
reaches the
the end
end of
of its
its full
full traverse, the
the
operator
sense another
another increase
increase in
i n torque
torque requireoperator will
wi II sense
ments;
i s friction
friction driven,
driven, no
no damage
damage
ments; since
since this
this control
control is
will
w i l l be
be sustained
sustained if
i f the
the operator
operator attempts
attempts to
to turn
turn it
it
beyond
beyond the
the end
end of
of its
its range.
range.
63H
a-169
3-3
The"
The " R
R ZERO"
ZERO" adjustment
adjustment consists
consists of
of two
two separate
separate
II
controls;
FI NEil
controls; "COARSE
"COARSE" for
for rapid
rapid scanning,
scanning, and
and II"FINE"
for
for precise
precise adjustment
adjustment in
i n locating
locating the
the null.
null.
.!-..
i
Step Step
After
After obtaining
obtaining minimum
minimum deflection
deflection of
of the
the null
null indicator,
indicator,
iti t isi s usually
usually desirable
desirable to
to adjust
adjust the
the sensitivity
sensitivity control
control
to
to reduce
reduce the
the residual
residual noise
noise level.
level. Leaving
Leaving all
a l l other
other
controls
controls undisturbed,
undisturbed, adjust
adjust the
the sensitivity
sensitivity control
control
until
(1 -1/2) meter
meter
until aa reading
reading of
of one
one and
and one-half
one-half (1-1/2)
divisions
divisions isi s obtained.
obtained. This
This sensitivity
sensitivity level
level is
is
adequate
adequate for
for the
the vast
vast majority
majority of
of applications.
applications.
ItI t
minimizes
minimizes the
the effects
effects of
of the
the total
total system
system noise;
noise;
in
i n addition,
addition, experience
experience has
has shown
show;? that
that iti t is
i s more
more
convenient
convenient to
to locate
locate aa null
nu1l with
with low
low meter
meter readings
readings
rather
rather than
than at
at half
half scale
scale or
or above.
above.
-.
i
Step 1.
Step
Remove the
the short
short circuit
circuit from
from across
across the
the TEST
TEST binding
binding
Remove
posts
posts and
and connect
connect the
the test
test specimen.
specimen.
Step ~.
k.
Step
Adjust
Adjust the
the SERIES
SERIES INDUCTANCE
INDUCTANCE 111000
"1 000 pHil
pH" decade
decade
switch
switch for
for minimum
minimum deflection
deflection of
of the
the null
nu1l indicator.
indicator.
Adjust
Adjust the
the MICROHENRIES
MICROHENRIES dial
dial to
to obtain
obtain aa lower
lower null
null
indication.
I f null
null deflection
deflection is
i s not
not reduced,
reduced, then
then
indication. If
set
set this
this decade
decade switch
switch to
to next
next lower
lower position
position and
and
readjust
readjust MICROHENRIES
MICROHENRIES dial
dial for
for minimum
minimum deflection.
deflection.
.
Step ~.
-I
Step
Now
Now adjust
adjust th~:SERIES
the SERIES RESISTANCE
RESISTANCE control
control for
for further
further
reduction
"100 nil
S2" decade
decade switch
switch
reduction of
o f null
null indication. Use
Use 11100
i f necessary.
if
-
Step
Step m.
m.
Now
NDUCTANCE and
SERIES IINDUCTANCE
and
Now alternately
alternately adjust
adjust the
the SERIES
SERIES
SERIES RESISTANCE
RESISTANCE controls
controls until
until null
null indicator
indicator
deflection
i s an
an absolute
absolute minimum.
minimum.
deflection is
Step~.
n.
Step -
To
To obtain
obtain the
the value
value of inductance
inductance under
under test, add
add the
the
readings
SERIES INDUCTANCE
INDUCTANCE dials
dials and
and
readings on
on the
the two
two SERIES
multiply
Y L
by the
the factor
factor indicated
indicated on
on the
the MULT1PL
MULTIPLY
multiply by
AND
BY dial.
dial.
A N D R BY
8H
a-169
3~
l
I
280
oI
0W
...... I
$
260
--
240
()
c;;:0 220
;;:0
m
Z
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~
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200
180
I
m
<
m
160
I
---............
~
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I
Z
100
60
l>
X
~
C
~
\
l>
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\
m
til
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20
o
FREQUENCY kHz
kHz
FREQUENCY
;;:0
;;:0
m'
Z
-I
0
0
0
.....
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;;:0
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40
C
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...... ......
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01
500
500 kHz
kHz
50
50 kHz
kHz
kHz
55 kHz
m
()
:r
0
..,....
Chart 22
Chart
XO.O1 RANGE
RANGE
63H
63H MAXIMUM
MAXIMUM AC
AC TEST
TEST CURRENT
CURRENT XO.Ol
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CURRENT MA.
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CURRENT
63H
63 H
a-169
a-1 69
3-6
3-6
0
d
o0
-------------------------
Chart
Chart33
XO.l RANGE
RANGE
63H
MAXIMUMAC
ACTEST
TESTCURRENT
CURRENT XO.1
63HMAXIMUM
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a-169
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CURRENT
CURRENT
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Chart
Chart
--.44
XI RANGE
RANGE
63HMAXIMUM
MAXIMUMAC
AC TEST
TESTCURRENT
CURRENT Xl
63H
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63H
0-169
33-8
-8
Chart
Chart 55
6 3 MAXIMUM
MAXIMUM
~
AC TEST
TESTCURRENT
CURRENT X10
XIO RANGE
RANGE
63H
AC
.
1
I
I
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0-169
NN
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-
9
.
CURRENT MA.
MA.
CURRENT
3-9
o0
Example:
Example:
Reading on
on 1000
1000 tJH
pH dial
dial
Reading
== 3000.0
3000.0 tJH
pH
Reading
NDUCTANCE dial
Reading on
on SERIES
SERIES IINDUCTANCE
dial
== 437.5
437.5 pH
pH
Sum
Sum
== 3437.5
3437.5 tJH
pH
MUL
TIPLY LAND
MULTIPLY
L AND R BY
BY dial
dial = 0.1
0.1
= 343.75
343.75
Inductance of coi
coilI under
under test
test
Inductance
Stepo.
Step
~.
tJH
pH
To
obtain the value of series resistance under test,
Toobtainthevalueofseriesresistanceundertest,
add
add the
the readings
readings on
on the two SERIES
SERIES RESISTANCE
RESISTANCE
dials
dials and
and multiply by
by the factor indicated
indicated on
on the
the
MULTIPLY
MULTIPLY LAND
L AND R BY
BY dial.
Example:
Example:
Reading on 1000
100R dial
Reading
Reading
NCE dial
RESISTANCE
dial
Reading on
on SERIES RESISTA
Sum
Sum
= 0.00
0.0~
=
= 64.00
64.OR
=
= 64.00
64.00
MUL
TIPLY LAND
R BY dial = 0.1
MULTIPLY
L AND R
Resistance of coil under test
Resistance
3-4
3-4
= 6.40
=
6.4R
AC TEST VOLTAGE AND CURRENT MEASUREMENTS
MEASUREMENTS
3-4-1
3-4-1
The ac voltage across the test specimen or the alternating current passing
through the test can be adjusted from nearly zero to maximum
maximum by means of the OSC
LEVEL control.
ll
control. Maximum open-circuit
open-circuit test voltage iiss approximately 3.0
3.0 volts rms on a
all
ranges except on the XO.OO1
XO.OOl range,
range, where iitt iiss approximately 1.5
1 .5 V.
V.
3-4-2
3-4-2
XO.OOl range,
range, the oscillator level
PRECAUTION: When operating on the XO.OO1
control should not be set beyond approximately
n order to avoid
approximately the "RED LINE"
LI NE" position iin
possible distortion of the test signal,
signal, and also to prevent heating of
of resistors iin
bridge
possible
n the bridge
which might cause drift iin
n null
null indication.
indication.
3-4-3
3-4-3
voltage appearing across the test
test at balance
balance can be
be measured
measured by
by aa high
high
The voltage
impedance
impedance vacuum
vacuum tube
tube voltmeter.
voltmeter.
63H
a-169
3-10
3-4-4
3-4-4
The current
current through
through the
the test
test may
may be
be determined
determined with
with aa clip-on
clip-on type
type
The
ac
ac milliammeter.
milliammeter. It
It may
may also
also be
be determined
determined by
by measuring
measuring the
the voltage
voltage drop
drop across
across aa one
one
ohm
N D terminal
ohm resistor-connected
resistor connected between
between the
the G
GND
terminal and
and the
the specimen
specimen under
under test.
test. The
The current
current
milliamperes can
can thus
thus be
be read
read directly
directly iin
terms of
of millivolts across
across the
the one
one ohm
ohm resistor.
resistor.
iin
n milliamperes
n terms
However, iiff the
the latter method
method iiss used,
used, the
the one
one ohm
ohm of
of resistance
resistance must
must be subtracted
subtracted from
from the
However,
indicated Series Resistance
Resistance to obtain the correct value.
value.
3-4-5
3-4-5
Maximum ac test current values versus frequency for each range are shown
3-5 to 3-9.
3-9.
iin
n the charts on pages 3-5
3-5
3-5
SUPERIMPOSED DIRECT
DIRECT CURRENT
APPLICATION OF SUPERIMPOSED
3-5-1
3-5-1
Superimposed direct current may be applied to the coil under test within
maximum limits indicated iinn the following table.
table.
the maximum
NOTE:
NOTE:
shown iinn this table are the maximum
maximum dc levels that may
may
Values shown
full ac level without overheating the
be superimposed
superimposed on the full
bridge resistors.
resistors,
Exceeding
range could
Exceeding the value for any given range
cause heating
drift,
heating of the bridge
bridge resistors,
resistors, with resultant null
nu1l drift,
or altered bridge
bridge calibration
calibration.
0
If
i s prolonged or is
is
I f the overload is
substantially
substantial ly beyond
beyond specified limits,
limits, extensive damage
damage to
It.
bri
dge components
bridge
components may
may resu
result.
Table
2
Table 2
MULTIPLY
L/R
MUL
TIPLY L/R
RANGE
RANGE
MAX. DIRECT
DIRECT CURRE
CURRENT
NT
Mi Iliamperes
Milliamperes
300
300
150
150
0.001
0.01
70
70
70
70
0.1
1.0
1 .O
10.0
10.0
50
50
I
L
63H
a-169
3-11
3-5-2
3-5-2
The direct
direct current
current source
source and
and milliammeter
milliammeter should
should be
be connected
connected between
between
The
GND binding
binding post
post and
and the
the low
low side
side of
of the
the test.
test. (See
(See accompanying
accompanying diagram).
diagram). A
A highhighthe GND
the
capacitance electrolytic
electrolytic capacitor*
capacitor* of
of adequate
adequate voltage
voltage rating
rating should
should be
be connected
connected across
across
capacitance
the dc
dc source
source and
and milliammeter
milliammeter to
to minimize
minimize errors
errors resulting
resulting from
from this
this series
series impedance.
impedance. This
the
This
impedance may
may also
also be
be measured
measured and
and the
the values
values subtracted
subtracted from
from the
the final
final measurement.
measurement.
impedance
Electrolytic capacitors
capacitors with
with high
high effective
effective series
series resistance
resistance should
should not
not be
be used.
used.
** Electrolytic
f
TEST
TEST
SAMPLE
DC
MILLIAMMETER
MILLIAMMETER
Figure3.
Figure 3.
3-6
3-6
DC
SOURCE
SOURCE
Circuit for applying superimposed dc.
Circuitforapplyingsuperimposeddc.
INDUCTANCE STANDARDIZING TECHNIQUE
Inductance may be standardized by a series resonant method
method using precision
lnductance
capacitors and frequency standards.
standards. The Model 63H lnductance
Inductance Bridge may be utilized
capacitors
to
to determine
determine the
the series
series resonant condition.
condition.
3-6-1
3-6-1
Connect
Connect aa stable
stable external
external oscillator
osci Ilator to
to the
the bridge
bridge transformer.
transformer. Adjust
Adjust
the external
external signal
signal source
source to
to the
the desired
desired frequency
frequency using
using aa precision
precision electronic
electronic counter
counter
the
(0.01%).
(0001%).
3-6-2
3-6-2
Select aa high
high Q,
Q, stable,
stable, mica
mica capacitor
capacitor having
having aa capacitance
capacitance slightly
slightly
Select
greater (not
(not more
more than
than 5%)
5%) than
than that
that required
required to
to resonate
resonate the
the inductor
inductor to
to be
be standardized.
standardized.
greater
This capacitance
capacitance must
must be
be greater
greater than
than the
the required
required value
value so
so that
that the
the final
final effective
effective
This
inductance
i l l read
inductance w
will
read up-scale
up-scale on
on the
the dial.
dial.
63H
a-169
3-12
3-6-3
3-6-3
Using aa precision
precision capacitance
capacitance bridge,
bridge, determine
determine the
the absolute
absolute capacitance
capacitance
Using
A BEC
BEC Model
Model 74D
74D 100
100 kHz
kHz Capacitance
Capacitance Bridge
Bridge may
may be
be used
used for
for
of the
the standard
standard capacitor.
capacitor. A
of
this purpose.
purpose. If
I f aa frequency
frequency other
other than
than 100
100 kHz
kHz isi s to
to be
be used
used for
for the
the calibration
calibration of
of the
the
this
75C may
may be
be substituted.
substituted.
standard inductor,
inductor, aa Model
Model 75C
standard
Determine also
also the
the shunt
shunt conductance
conductance of
of the
the capacitor.
capacitor. The
The measurement
measurement
Determine
of conductance
conductance should
should be
be made
made at
at the
the test
test frequency.
frequency. This
This may
may be
be accomplished
accomplished with
with aa
of
variable
variable frequency
frequency capacitance
capacitance bridge
bridge such
such as
as the
the BEC
BEC Model
Model 75C.
75C.
Calculate
Calculate the
the equivalent
equivalent series
series resistance
resistance of
of the
the standard
standard capacitor
capacitor using
using
the
the relationship:
relationship:
=R
RC =
=
Series Resistance
Resistance =
Series
C
G
2G
w 2c2
W
C2
Where
Where
G == the
the shunt
shunt conductance
conductance of
of the
the capacitor
capacitor in
i n mhos,
mhos,
G
measured
measured at
at the
the test
test frequency.
frequency.
CC == the
the capacitance
capacitance of
of the
the standard
standard capacitor
capacitor in
in
farads
farads
and
and
w == 2nf
2lTf
c.)
3-6-4
3-6-4
Adjust the
the bridge
bridge at
a t the
the test
test frequency
frequency for
for zero
zero balance
balance of
~f both
both Land
L and R
R on
on
Adjust
aa suitable
suitable L/R
L/R range.
range. The
The MULTIPLY
MULTIPLYLAND
L AND RR BY
BYswitch
switch may
may be
be set
set one
one step
step lower
lower than
than
would
would normally
normally be
be used
used to
to measure
measure the
the inductor
inductor to
to obtain
obtain aa better
better readout
readout for
for resistance.
resistance.
3-6-5
Connect
Connect the
the test
test inductor
inductor and
and standard
standardcapacitor
capacitor in
i n series
seriesacross
across the
the TEST
TEST
3-6-5
binding
bindingpost
post of
of the
the bridge.
bridge. Connect
Connect the
the low
low side
side of
of the
the inductor
inductor to
to ground
ground and
and the
the standard
standard
capacitor
capacitor to
to the
the high
high side
side of
of the
the coil
c o i l and
and test
test terminal
terminal of
of the
the bridge.
bridge.
3-6-6
3-6-6
Balance
Balance the
the bridge
bridge and
and read
read the
the inductance
inductance and
and resistance
resistance values
values as
as well
well as
as
the
the exact
exact frequency
frequency of
of the
the external
external oscillator.
oscillator.
Record
Recordthe
the inductance
inductance reading
reading
(A
(AL)L)
Record
ng
Recordthe
the resistance
resistance readi
reading
)
(R
(R1
1)
((f f) j
Record
Recordthe
the frequency
frequency
63H
a-169
3-13
3-6-7
3-6-7
Compute the
the equivalent
equivalent negative
negative inductance
inductance of
of the
the standard
standard capacitor.
capacitor.
Compute
=
L
N
1
W 2C
= LN
L ++ 6A LL
True inductance
inductance of
of standard
standard =
True
True resistance
resistance of
of standard
standard =
=R
R11 -- R
RCC
True
3-6-8
3-6-8
Check
Check the
the accuracy
accuracy of
of the
the bridge
bridge resistance
resistance reading
reading by
by substituting
substituting aa decade
decade
resistance box
box such
such as
as aa General
General Radio
Radio No. 1432
1432 across
across the
the test
test terminals
terminals and
and adjusting
adjusting the
the
resistance
resistance box
box and
and reactive
reactive bridge
bridge controls
controls for
for aa null. Do
resistance
Do not
not adjust
adjust the
the resistance
resistance dial.
3-6-9
3-6-9
The
The accuracy of this
this technique
technique depends
depends largely
largely upon
upon the
the care
care in
i n measuring
measuring
the standard
standard capacitor and
and frequency in
i n Steps
Steps 3-6-3
3-6-3 and
and 3-6-6.
3-6-6. Precautions
Precautions should
should be
be
taken to avoid
avoid introducing
introducing stray capacitance across
across the test terminals as
as well
well as
as using
using short
taken
leads with aa minimum
minimum of contact resistance
resistance while measuring
measuring the resistance
resistance in
i n Step
Step 3-6-8.
3-6-8.
leads
63H
a-169
3-14
1V
SECTION 1V
MAINTENANCE
MA1NTE NANCE
4-1
CHECKS
CIRCUIT CHECKS
given to aid
aid in
in trouble shooting the various circuits of
The following information iiss given
the bridge as well as to determine if
i f all
all circuits are operating properly.
Voltage measurements
made from
from the indicated point to chassis
measurements were made
chassis ground
ground with aa
multitester such
such as aa Simpson
Simpson No. 260 or equivalent.
equivalent. The voltages are nominal
nominal and
and may
units due to component
component tolerances. Voltage
Vol tage measurements
measurements are made
made
between units
vary slightly between
at nominal
line voltage and
nominal line
and under full load
load conditions.
conditions.
4-2
4-2
VOLTAGE MEASUREMENTS
MEASUREMENTS
4-2-1
4-2-1
Power Supply
V201 6BW4 -- Rectifier tube voltage readings.
V201
Pin No.
Pin No.
No.11
380V ac
Pin
No.77
Pin
Pin
No.4
Pin No.
4
6.3V
6.3V
380V ac
Pin No.
Pin
No.99 +425V dc
ac
Junction of L201,
L201, C202b
C202b and
and R202
R202
+415V ac
5.5V
5.5V ac
5.5V ac
5.5V
Junction
0206
Junction of 0205
D205 and
and D206
Junction
Junction of 0207
D207 and
and 0208
D208
Junction
Junction of 0201
D201 and
and 0202
D202
Junction
Junction of 0203
D203 and
and 0204
D204
Junction
D203 and
and C20l
C201
Junction of D201,
0201, 0203
15
15 V ac
15
15 V ac
-34
-34 V ac
Voltage measurements
pin connector,
measurements made
made at the 12
12 pin
connector, J201,
J201, are as
follows:
fol lows:
Pin No.
Pin
No.33
Pin No.
4
Pin
No.4
Pin
Pin No.
No.55
Pin
Pin No.
No.66
Pin
No.88
Pin No.
6.3V
6.3V ac
-6.6V
-6.6V dc
Pin
Pin No. 99
+6.6V
+6.6V de
dc
Pin
No.7
Pin No.
7
+300V dc
+300V dc
dc
+150V de
6.3V
6~3V ac
Pin
11 -11.5V
-1 1.5V dc
Pin No. 11
The total power from
from the ac line,
line, with aa nominal
nominal line
line voltage of
120
120 volts,
volts, should
should be 60 watts
watts as measured
measured with a Sensitive Research,
Research,
Model
Model Univ. Wattmeter.
63H
0-169
4-1
4-2-2
4-2-2
Oscillator
Oscillator
~--
Osci Ilator tube
tube voltage
voltage readings
readings VlOl
Vl01
Oscillator
Pin No.
No. 1
Pin
Pin No.2
No. 2
Pin
+200V de
dc
+200V
+2.9V de
dc
+2.9V
Pin No.6
No. 6
Pin
+156V dc
dc
+156V
Pin No.8
No. 8
Pin
OV
OV
+1.7V
+1.7V dc
dc
Pin No.9
No. 9
Pin
6.3V
6.3V ac
ac
Pin No.7
No. 7
Pin
OV
OV
No. 3
Pin No.3
Pin
1 2AT7
12AT7
The
The total
total current drawn
drawn by
by the
the oscillator under
under normal
normal conditions
conditions
mA.
should be
be 77 mAo
should
The
The following
following are
are nominal
nominal ac
ac voltages taken
taken at
a t the
the junction
iunction of Rl07
R107
and Rl08
R108 with
with aa Ballantine 314
314 VTVM:
and
XI Range:
Xl
V l 0 Range:
Range:
Vl
4-2-3
4-2-3
5 kHz
6.6V
6.6V
10 kHz
10
6.4V
6.4V
50 kHz
6.4V
6.4V
100 kHz
100
6.4V
6.4V
25 kHz
kHz
50
kHz
50kHz
6.2V
6.2V
6.2V
6.2V
250 kHz
500
500 kHz
6.2V
6.2V
6.2V
6.2V
Emitter Follower
The following are nominal dc voltages throughout the emitter follower
circuit. CAUTfON:
CAUnON: In
In making
making voltage measurements
measurements iitt iiss absolutely necessary circuit.
notto short
the test lead to ground from any point being measured.
Q
l 01
0101
22N404A
N404A
Emitter
Emi
tter
Base
Collector
Q102
0102
2N404A
Emitter
Base
Base
Collector
Collector
Q103
0103
2Nl605
2N1605
Emitter
Emi
tter
Base
Base
Collector
Collector
Q104
Ql04
22Nl046
N1046
Emitter
Emi
tter
Base
Base
Collector
Col
lector
63H
a-169
4-2
.5
-21 .5
-21.0
-21
.O
-34
-34
volts
volts
-21.5
-21.5
-21.5
-21.5
-34
-34
volts
volts
volts
volts
Supply
Supply
volts
volts
volts
volts
Supply
Supply
-21 .5 volts
volts
-21.5
vol ts
-21 .5 volts
-21.5
-18.0 volts
volts
-18.0
-21 .0
.0 volts
vol ts
-21
-21.5
volts
-21
.5 volts
-34
-34
Supply
Supply
4-2-4
4-2-4
Tuned
Tuned Detector
Tuned
Tuned detector tube
tube voltage readings.
4-2-5
4-2-5
Pin
Pin No.1
No. 1
+130V de
dc
Pin
Pin No.2
No. 2
OV
OV
Pin
Pin No.3
No. 3
+
+ 90V
90V de
dc
Pin
Pin No.4
No.4
+6.6V
+6.6V de
dc
Pin
Pin No.5
No. 5
Ground
Ground
V501
V501 6U8
6U8
Pin
Pin No.6
No. 6
Pin
Pin No.7
No.7
Pin
Pin No.8
No.8
Pin
Pin No.9
No. 9
+85V
+85V de
dc
+1.3V
+1.3V de
dc
+6.2V
+6.2V de
dc
OV
OV
Preamplifier
Preamplifier tube
tube voltage
voltage readings.
Pin
Pin No.1
No. 1
OV
OV
Pin
Pin No.2
No. 2
No
N o pin
pin
Pin
Pin No.3
No. 3
Ground
Ground
Pin
Pin No.4
No. 4
+6.6V
+6.6V de
dc
V401
V401 6AK5
6AK5
Pin
No.5
Pin N
o. 5
Pin
Pin No. 66
Pin
Pin No.7
No.7
+21
+21 V de*
dc*
+60V de*
dc*
+1.5V
+1.5V de*
dc*
* These
These voltages
voltages are
are with
with no
no signal
signal input
input and
and will
w i l l vary widely
widely with
with
signal
signal input.
4-2-6
4-2-6
Wideband
Wideband Amplifier
The
SE NSITIVI
NSITIVlTV
TY control
control at
at
The following
following voltage readings
readings are
are made
made with
with SE
maximum
maximum gain
gain and
and no
no i·nput
i-nputsignal.
V601
V60 1
Pin
P i n No.6
No.6
Pin
Pin No.7
No. 7
+178V
+178V de
dc
+2.5V
+2.5V de
dc
Pin No.1
No. 1
Pin
6AU6
6AU6
OV
OV
Pin No.6
No. 6
Pin
+150V
+150V de
dc
Pin
Pin No.4
No. 4
6.3V
6.3V ae
ac
Pin No.7
No. 7
Pin
+4V
Pin
P i n No.5
No.5
+208V de
dc
Pin
Pin No.1
No. 1
Pin
Pin No.4
No. 4
Pin
Pin No.5
No. 5
V602
V602
63H
a-169
6AU6
6AU6
OV
OV
6.3V
6.3V ae
ac
+185V
+185V de
dc
4-3
de
dc
/
/
Wideband amplifier
amplifier gain vs.
vs. frequency.
frequency.
lnput
Input Level - 0.001V
0.001 V
Gain Controls -- Maximum
-
Frequency
Input Level
Output Level
Gain iinn dB
5 kHz
10 kHz
0.001V
0.001 V
0.001
0.001 V
V
1.9V
l.9V
1.9V
l.9V
65.5
65.5 dB
65.5
65.5 dB
50 kHz
100 kHz
0.001
0.001 V
0.001
0.001 V
1.9V
l.9V
1.9V
l.9V
SOO kHz
500
0.001V
0.001 V
1l.OV
.OV
65.5
65.5 dB
65.5
65.5 dB
60.0
60.0 dB
Input level measured
measured at J601.
J601 •
lnput
measured at C612,
C612, C613 and D601.
D601 •
Output level measured
4-3
4-3
N AND ADJUSTMENT OF OSCILLATOR
CALlBRATlO
CALIBRATION
OSCILLATOR AND TUNED DETECTOR
DETECTOR
4-3-1
4-3-1
The oscillator dial has one calibration of from
from 5.0
5.0 to 50 and
and with the use
of the XI
Xl and XI0
X10 multiplier the frequency iiss covered
covered iinn two ranges
ranges of from 5 kHz to 50 kHz
and 50 kHz to 500 kHz. The accuracy of calibration iiss ~
3 %
and should
and
±3%
and
should be maintained.
Errors iinn low frequency
Rl02, Rl03
Errors
frequency calibration may be due
due to changes in
in the resistors
resistors R101,
R101, R102,
R103
.
and R104.
High frequency
calibration may be adjusted
adiusted by Cl04
C104 adjustment
adjustment No.
1
and
Rl04. High
frequency calibration
No.1.
4-3-2
4-3-2
Tuned Detector Adjustment
Tuned
Before
oscillator-detector
Before adjustment
adjustment of the tuned
tuned detector,
detector, the cover over the oscillator-detector
chassis
be in
in place and
chassis as well as the preamplifier must be
and all
all screws
screws tightened.
tightened.
Disconnect
Disconnect the power plugs J602
5602 and
and P602
P602 to the wideband
wideband amplifier,
amplifier, also
also
101 and
lIator secti
on.
JJlOl
and P101
P l O l to the osci
oscillator
section.
Use
Use aa coaxial "T"
" T" connector at J601,
J601, the input to the wideband
wideband amplifier,
amplifier,
vtvm such
such as aa Ballantine
Ballantine 314 and
and on
an oscilloscope. Long
Long coaxial leads
leads
for connecting aa vtvm
should
should not be
be used
used because
because of the added
added capacitance. The
The input of the wideband
wideband amplifier
should
should not be
be disconnected.
Set the
the MULTIPLY
MULTIPLY LAND
L AND R
R BY switch S303
S303 to the
the XO.l
XO.l range.
Connect aa 55 kHz
MHz oscillator to
to the bridge
bridge TEST terminals through
through on
an
kHz to 1 MHz
attenuator. The
The input
input at the
the TEST terminals should
should be
be monitored
monitored and
and kept
kept at 0.01 volt,
volt, with
with
aa Ballantine 314
314 voltmeter or equivalent.
63H
0-169
4-4
Set the
the frequency
frequency multiply
multiply switch
switch S501
S501 to
to the
the Xl
X I position,
position, set
set the
the
Set
oscillator to
to 55 kHz
kHz and
and alternately
alternately adjust
adjust DETECTOR
DETECTOR TUNE
TUNE control
control and
and adjustment
adjustment No.
No.
oscillator
so that
that the
the discrimination
discrimination at
at 10
10 kHz
kHz will
w i l l be
be 25
25 to
to 30
30 dB.
dB.
66 so
Set
Set oscillator
oscillator to
to 50
50 kHz
kHz maintaining
maintaining 0.01
0.01 V
V into
into the
the bridge
bridge test
test terminals,
terminals,
and alternately
alternately adjust
adjust the
the DETECTOR
DETECTOR TUNE
TUNE control
control and
and adjustment
adjustment No.3
No. 3 so
so that
that the
the
and
discrimination at
a t 100
100 kHz
kHz wi
w iIIl l be
be 25
25 to
to 30
30 dB.
dB.
discrimination
Now
and No.3
No. 3 until
until
Now recheck
recheck between
between 55 and
and 50
50 kHz
kHz and
and readjust
readjust No.6
No. 6 and
these readings
readings are
are obtained
obtained with
with no
no oscillations.
osci Ilations.
these
Set
Set the
the frequency
frequency multiply
multiply switch
switch S501
S501 to
to the
the X10
X I 0 position,
position, and
and set
set the
the
oscillator
oscillator to
to 50
50 kHz
kHz at
a t 0.01
0.01 volt
volt input.
input.
TUNE control
control
Alternately adjust
adjust the
the DETECTOR
DETECTOR TUNE
Alternately
and adjustment
adjustment No.5
No. 5 so
so that
that the
the discrimination
discrimination at
at 100
100 kHz
kHz wi
w iIIl l be
be 25
25 to
to 30
30 dB.
dB.
and
.
Set frequency
frequency to
to 500
500 kHz
kHz with
with input
input level
level maintained
maintained at
at 0.01
0.01 volt.
volt
Set
Alternately
Alternately adjust
adjust the
the DETECTOR
DETECTOR TUNE
TUNE control
control and
and adjustment
adjustment No.2
No. 2 so
so that
that the
the
discrimination at
a t 11 MHz
MHz wi
w iIIl l be
be 25
25 to
to 30
30 dB.
dB.
discrimination
Now
Now recheck
recheck between
between 50
50 and
and 500
500 kHz
kHz and
and readjust
readjust No.2
No. 2 and
and No.5
No. 5 unti
untilI
these
these readings
readings are
are obtained
obtained with
with no
no oscillations.
oscillations. It
I t may
may be
be necessary
necessary to
to remove
remove the
the
cover
at 500
500 kHz
kHz in
i n order
order to
to obtain
obtain only
only one
one tuning
tuning point
point with
with no
no
cover to
to adjust
adjust C504
C504 No.4
No. 4 at
oscillation.
oscillation.
4-4
4-4
BRIDGE SECTION
SECTION ADJUSTMENTS
ADJUSTMENTS
BRIDGE
CAUTION:
CAUTION:
Adjustments
section and MULTIPLY
Adjustments to
t o tthe
h e bridge
bridgesectionand
MULTIPLY LAND
L A N D R BY
BY
switch
switch should
should not
not be
be made
made if
i f at
at all
a l l possible.
possible. Such
Such adjustments
adjustments are
are preferably
preferably factory
factory made.
made.
The
The following
following information
information is
i s primarily
primarily for
for determining
determining 'the
the proper
proper functioning
functioning of
of the
the bridge.
bridge.
Replacement
Replacement and
and movement
movement of
of components
components in
i n the
the bridge
bridge section
section may
may result
result in
i n bridge
bridge
inaccuracies.
inaccuracies.
4-4-1
4-4-1
Variable
Variable Capacitor
C a ~ a ctor
i Calibration
Cali bration (C302)
(C302)
The
The variable
variable capacitor should
should be
be checked
checked with
with aa 20
20 kHz
kHz capacitance
capacitance bridge.
The
The bridge
bridge circuit should
should be
be opened
opened at
a t A'
A ' which
which is
i s the
the wire
wire braid
braid to
to the
the ceramic standoff
in
i n the
the bridge
bridge section.
section. Also
Also the
the lead
lead to
to the
the bridge
bridge input
input transformer
transformer T301
T301 should
should be
be opened
opened
at
The resistor
resistor R302
R302 should
should be
be opened
opened where
where it
i t connects
connects to
to R301. (Reference
(Reference schematic
schematic
at B. The
Switch S302
5302 (Inductance
(Inductance Decade)
Decade) should
should be
be set
set on
on zero. The
The leads
leads to
to the
the L
830183).
830183). Switch
and
and R
R zero
zero controls
controls need
need not
not be
be opened. C301
C301 should
should be
be set
set at
a t minimum
minimum capacitance
capacitance and
and R304
R304
63H
a-169
4-5
set at maximum
maximum resistance.
resistance. R306
R306 should
should be
be set near
near maximum
maximum resistance
resistance but
but may
may be
be used
used
set
as aa fine
fine conductance
conductance adjustment, the same
same as
as the capacitance
capacitance bridge
bridge conductance zero
as
adjustment.
The first
first 200
200 (100
(100 pF)
pF) dial
dial divisions
divisions of
o f the
the capacitor should
should be
be calibrated
calibrated
The
every 10
10 divisions
divisions (5
(5 pF)
pF) and
and must
must be
be within
within .:to.
B.1
This should
should be
be done
done on
on the
the XO.l
XO.l
every
1 pF. This
range of the
the capacitance
capacitance bridge. The
The remaining
remaining 800
800 dial
dial divisions
divisions may
may be
be calibrated every
every
range
H.l%.
100 divisions
divisions (50
(50 pF)
pF) and
and may
may be
be done
done on
on the
the Xl
X1 range. All
A l l readings
readings must
must be
be within
within .:to.1%.
100
Care
Care should
should be
be taken
taken to
to keep
keep leads
leads as
as short
short as
as possible
possible when
when connecting
connecting the
the
capacitance bridge
bridge to
to the
the inductance
inductance bridge; all
a l l clip
c l i p leads
leads should
should be
be kept
kept as
as far from
from the
the
capacitance
i s complete,
complete, removing
removing the
the leads
leads
as possible, so
so when
when all
a l l calibration
calibration is
variable capacitor as
will
w i l l not
not affect
affect the
the calibration.
i t will
w i l l be
be necessary
necessary to
to return
return
In calibration
calibration of the
the first
first 200
200 dial
dial divisions,
divisions, it
In
to zero
zero and
and recheck
recheck after almost
almost every
every plate
plate adjustment
adjustment as
as the
the minimum
minimum capacitance will
will
to
be changed
changed considerably
considerably over the
the first
first part
part of the
the calibration.
be
4-4-2
4-4-2
Inductance
Inductance Decade
Decade Switch
Switch Cal
Calibration
ibration (5302)
(S302)
The arrangement
arrangement of leads
leads for
for calibration
calibration of the
the decade
decade switch
switch can
can be
be the
the
The
same
same as
as for
for the
the variable
variable capacitor calibration. However, aa bridge
bridge shield
shield cover, with
with
holes for
for adjustment
adjustment purposes
purposes should
should be
be used
used to
to insure
insure the
the best
best accuracy. The
The variable
variable
holes
capacitor
capacitor should
should be
be set
set on
on zero.
In
%
In position
position No.1
No. 1 (1000
(1000 fJH),
pH), the
the capacitance
capacitance should
should be
be 500
500 pF
pF ±O.l
B.1%
and
and adjusted
adjusted by
by No. 10
10 (C304).
Position
Position No.2
No. 2 (2000
(2000 fJH)
pH) should
should be
be 1000
1000 pF
pF ±O.l%
B. 1% and
and adjusted
adjusted by
by
No. 13
13 (C311).
1%
and
Position
Position No.3
No. 3 (3000
(3000 fJH)
pH) should
should be
be 1500
1500 pF
pF .:to.
B.1
%
and adjusted
adjusted by
by
No.9
No. 9 (C303). This
This position
position is
i s aa combination
combination of capacitors
capacitors C304, C305
C305 and
and C310, C311.
If
i s indicated
indicated on
on this
this position,
position, read
read the
the value
value of
o f error and
and reset
reset
I f an
an error is
the
the capacitance
capacitance bridge
bridge to
to zero
zero offset
offset by
by the
the amount
amount of error and
and in
i n the
the opposite
opposite direction;
direction;
that
is, if
i f the
the capacitance
capacitance if
i f 22 pF
pF high,
high, set
set the
the bridge
bridge at
a t minus
minus 22 pF
pF from
from zero
zero and
and adjust
adjust
that is,
No.9
(C303) for
for zero.
zero. Return
Return bridge
bridge to
to zero,
zero, rebalance
rebalance and
and recheck
recheck positions
positions 1,
1 ,22 and
and 3.
3.
No. 9 (C303)
Repeat
Repeat this
this procedure
procedure until
until each
each position
position is
i s within
within .:to.
H.1%
1% of
of nominal.
nominal.
63H
0-169
4-6
Position No.4
No. 4 (4000
(4000 jJH) should
Position
M . l % and
and adjusted
adjusted by
by
should be
be 2000
2000 pF
pF 29.1%
No. 12
1 2 (C309).
Position
.±O. 1% and
Position No.5
No. 5 (5000
(5000 jJH)
pH) should
should be
be 2500
2500 pF
pFfl.l%
and adjusted
adjusted by
by
No. 11
1 1 (C306).
The
The remaining
remaining positions
positions are
are each
each an
an increase
increase of 500
500 pF
pF and
and have
have no
no
adjustments. If
I f each
each capacitor is
i s properly
properly adjusted
adjusted from
from position
position 1 to
to 5,
5, each
each remaining
remaining
position
position should
should check as
as follows:
No. 66
3000
3000 pF
pF
+0.1%
±O.l%
No. 7
7
3500
3500 pF
pF
No.8
No. 8
4000
4000 pF
pF
*.I% 1%
.±O.
B.1
%
. .±O.
1%
No. 9
4500
4500 pF
pF
+0.1%
±O.l%
No. 10
10
5000
5000 pF
pF
-+0.1%
±O.
1%
Restore all
a l l connections within
within the
the bridge
bridge section.
Restore
4-4-3
4-4-3
Balance
Balance Capacitor Adjustment
Adiustment (C315)
(C315)
It
It is
i s necessary
necessary to
to balance
balance the
the circuitry associated
associated with
with the
the balance
balance capacitor
C315
ibration procedures. The
C315 to
to obtain
obtain correct
correct adjustment
adiustment during
during the
the further
further cal
calibration
The MULTIPLY
MULTIPLY
L A N D R BY
BY switch
switch should
should be
be set
set on
on the
the XO.Ol
XO.O1 position,
position, and
and the
the bridge
bridge should
should be
be tuned
tuned and
and
LAND
operating at
at 10
10 kHz. The
The bridge
bridge circuit
circuit should
should be
be opened
opened at
a t point
point D, also
also the
the bridge
bridge test
test
operating
must be
be open. The
The rotor
rotor of the
the variable
variable capacitor (C302)
(C302) should
should be
be shorted
shorted to
to
terminals must
the stator
stator with
with aa short
short lead. Then
Then by
by alternately
alternately adjusting
adjusting No. 19
19 and
and No.
No, 20
the
20 on
on the
the
minimum meter
meter reading
reading will
w i l l be
be obtained. The
balance capacitor, aa minimum
balance
The meter
meter will
w i l l not
not indicate
indicate
zero at
at the
the null
null but
but there
there will
w i l l be
be aa definite
definite null
null condition. Care
Care in
i n making
making this
this adjustment
adjustment
zero
wi
make further
further adjustments
adjustments unnecessary.
w i IIl l make
4-4-4
4-4-4
Resistance
Resistance Decade
Decade Check
Check and
and Resistance
Resistance Dial
Dial (5301
(S301 and
and R301)
R301)
Set
Set the
the MULTIPLY
MULTIPLY LAND
L A N D R BY
BY switch
switch to
to Xl
X I .0
.0 with
with the
the resistance
resistance dial
dial set
set
on
on zero
zero and
and aa General
General Radio
Radio 1432T
1432T Decade
Decade Resistance
Resistance Box
Box connected
connected to
to the
the bridge
bridge test
test
terminals.
terminals. Check
Check each
each lOOn
100R position
position of
of the
the resistance
resistance decade
decade switch
switch from
from one
one hundred
hundred to
to
one
this procedure
procedure with
with resistance
resistance
Repeat this
one thousand
thousand ohms. Each
Each position
position must
must be
be within
within 0.5%.
0.5%. Repeat
dial.
dial.
63H
a-169
4-7
4-4-5
4-4-5
Product
Product Arm
Arm Adjustment (MULTIPLY
(MULTIPLY LAND
L AND R
R BY
BY switch)
switch)
The adjustment
adjustment of
o f the
the product arm
arm is
i s made
made on
on aa dc resistance
resistance measurement
measurement
The
resistance bridge
bridge accurate
accurate to
to five
five places
places is
i s required. The
The three
three leads
leads to
to the
the
basis. A resistance
resistance bridge
bridge should
should all
a l l be
be the
the same
same length. The
The resistance
resistance of the
the leads
leads should
should be
be
resistance
measured and
and used
used as
as aa correction
correction factor. One
One lead
lead should
should be
be connected
connected between
between the
the
measured
ground
ground side
side of the
the resistance
resistance bridge
bridge and
and aa ground
ground on
on the
the inductance
inductance bridge
bridge preferably
preferably
where the
the rear
rear section
section of the
the MULTIPLY
MULTIPLY LAND
L A N D R BY
BY switch
switch is
i s connected
connected to
to ground.
where
The
The other two
two leads
leads should
should be
be each
each of aa different
different color to
to identify
identify them
them and
and one
one should
should
on the
the rear
rear of the
the MUL
MULTIPLY
L A N D R BY
BY switch; the
the other
be connected
connected to
to point
point A on
be
T1PLY LAND
lead
BY switch
switch or at
at
lead wi
w i IIl l be
be connected
connected to
to point
point C
C either in
i n the
the MULTIPLY
MULTIPLY LAND
L A N D R BY
the
the balance
balance capacitor. The
The lead
lead from
from Alto
A'to the
the bridge
bridge section
section should
should be
be opened
opened where
where
it
TIPLY LAND
BY switch. The
The bridge
bridge test
test terminals must
must also
also be
be
i t leaves
leaves the
the MUL
MULTIPLY
L A N D R BY
open; that
that is,
is, no
no shorting
shorting plug
plug should
should be
be connected.
Now it
i t will
w i l l be
be possible
possible by
by connecting
connecting
Now
C lead
lead to
to the
the high
high post
post of the
the resistance
resistance bridge
bridge to
to measure
measure the
the dc
dc
the A or C
either the
to D or
or C
C to
to D. All
A l l solder
solder connections must
must be
be carefully made
made to
to insure
insure
resistance from
from A to
resistance
no high
high resistance
resistance connections
connections which
which could
could cause
cause considerable
considerable error in
i n the
the measurements.
measurements.
no
Extreme care
care should
should be
be used
used in
i n making
making the
the measurements, as
as well
well as
as reading
reading the
the values
values on
on
Extreme
the bridge
bridge and
and making
making the
the necessary
necessary calculations
calculations to
to insure
insure the
the best
best possible
possible accuracy
the
in
XO.OO1 down
down to
to the
the XI0
X I 0 range
range should
should be
be
i n these
these measurements. The
The rotation
rotation of
o f the
the XO.OOl
The XO.OOl
XO.OO1 and
and XI0
X I 0 ranges
ranges have
have separate
separate resistors
resistors which
which are
are not
not dependent
dependent upon
upon
followed. The
the XO.Ol
XO.O1 to
to the
the Xl
XI range
range should
should be
be adjusted
adjusted in
i n that order as
as
another range; however, the
each
each is
i s dependent
dependent on
on the
the value
value of the
the other.
The
The procedure
procedure to
to be
be followed,
followed, for
for example,
example, on
on the
the XO.OOl
XO.OO1 range
range is
i s as
as
follows.
First
First the
the resistance
resistance is
i s measured
measured from
from CD
CD which
which will
w i l l be
be in
i n the
the order
order of 55 ohms.
The
i s the
the resistance
resistance of the
the leads
leads will
w i l l be
be subtracted
subtracted from
from this
this value.
The correction
correction factor
factor which
which is
This
XO.OO1 range
range the
the product
product of the
the bridge
bridge arms
arms
O n the
the XO.OOl
This gives
gives aa corrected
corrected value
value for
for CD. On
3
3 should
CD
i s 22 x 10
lo3.• The
The value
value of 22 x 10
103
should be
be divided
divided by
by the
the corrected
corrected value
value of
CD x AD
AD is
CD
To this
this value
value is
i s added
added the
the correction
correction factor
factor (lead
(lead resistance)
resistance) to
to obtain
obtain
CD to
to obtain
obtain AD. To
aa value
i s then
then set
set up
up on
on the
the resistance
resistance bridge
bridge with
with the
the appropriate
appropriate leads
leads and
and
value of AD,
AD, which
which is
adjustment
adjustment 14
14 is
i s varied
varied to
to obtain
obtain this
this reading.
reading. This
This procedure
procedure should
should then
then be
be followed
followed
for
for the
the remaining
remaining four
four ranges.
ranges.
63H
a-169
4-8
4-4-6
4-4-6
Adjustment of Zeroing Controls
be capable of being
being zeroed on every range
range at every
The bridge should
should be
useable
frequency.
useable frequency.
any frequency,
The XO.OOl,
XO.OO1, XO.O1
and XO.l
X0.1 range
range should
should be
XO.Ol and
be able to be
be zeroed at
X I .0 range
range should
should be
zeroed to at least 250 kHz and
and the
the Xl.O
be able to be
be zeroed
w i l l not zero on any particular
X10
be zeroed
zeroed up
bridge will
X I 0 range
range should
should be
up to 100
100 kHz. If the bridge
range, a
should be
made to determine if
i f the proper shorting connector iiss being
range,
a check should
be made
being
On the XO.OOl
XO.OO1 range
range it
i t is
i s necessary
necessary to use
use the shorting link supplied; on the
used. On
other ranges,
ranges, the shorting
should be
shorting plug
plug supplied should
be used.
Using the proper shorting
shorting
Using
connectors, the bridge should
range given above. To locate
locate
connectors,
should zero over the frequency range
i n zeroing,
main controls may
w i l l show the
troubles in
zeroing, the main
may be
be used
used to zero the bridge which will
i s due to inductance
inductance or resistance.
approximate magnitude and
and iiff the fault is
approximate
4-4-7
4-4-7
Bridge
and Noise
Noise Level
Bridge Sensitivity and
Level
panel SENSITIVITY
SE NSITIVITY control at maximum
With the front panel
maximum gain,
gain, the noise
noise
level should
level
should not exceed 10
10 fJA at any frequency.
Any higher noise
indicates either
noise level
level indicates
a noisy 6AK5 (V40l)
i s adjusted near
near aa point of
o f oscillation thereby
a
(V401) or the tuned
tuned detector is
increasing the noise.
nominal sensitivity checks:
The following are nominal
/
SENSITIVITY control
control =
= Maximum
Maximum
Xl .0 OSC
LEVEL = Maximum
Range
Range X1.O
OSC LEVEL
Maximum
0.2 fJH
pH unbalance
unbalance == 20 fJA
pA
50 kHz 0.2
When checking sensitivity,
sensitivity, aa check should
be made
should be
made to make
make sure the meter
M601
M601 does
does not read
read offscale at maximum
maximum unbalance
unbalance (which
(which iiss with
with open
open circuit test
and with detector tuned.
tuned. This adjustment is
terminals) and
No.88 on
i s No.
on the rear of the meter, which
can
be set for just under
under full
unbalance, with maximum
can be
full scale reading
reading at maximum
maximum unbalance,
maximum level.
It
should be
be noted
It should
noted that this adjustment will
w i l l probably require readjustment
readjustment
each
circuit.
each time aa new tube V401
V401 (6AK5) iiss put iinn the circuit.
4-4-8
4-4-8
Readi
ng of Inductance
Reading
Inductance and
and Resistance
Resistance Standards
Standards
basic inductance
bridge is
3~0 where C isi s
The basic
inductance accuracy of the bridge
i s ±0.25%
9.25% +
+-where
300
C
att the test frequency.
the resonating capacitance of the coil
coil a
63H
a-169
4-9
The
The accuracy of the resistance
resistance measurements
measurements should
should be
be within the bridge
bridge
n
.
Li
specification
+3%
+
•
specification of ~
3 %
+ -.9...
25
25
In
In making
maki ng inductance
inductance measurements
measurements where the resonating
resonating capacitance
capacitance is
is
small and
and series
series resistance
resistance measurements
measurements where
where the Q
Q is
i s high, the
the full
full basic
basic accuracy
accuracy
small
statement must
must be
be used. Also,
Also, consult
consult the reactance
reactance chart,
chart, page
page 2-2,
2-2, to
to determine
determine if
if
statement
i s being
being made
made within the recommended
recommended range.
measurement is
the measurement
4-4-9
4-4-9
Level
AC Test Level
The
The maximum
maximum open
open circuit test level
level on
on the XO.Ol
XO.O1 to X10
X I 0 range
range should
should be
be
3,O volts rms
rms ±10%
+0%
I over the frequency range. The
The maximum
maximum test level
level on
on the XO.OOl
XO.OO1
3.0
range should
should be
be 11.5
rrns with
with the osci
oscillator
level control
control set at red
red line. The
The level
level
range
.5 volts rms
Ilator level
control should
should never be
be used
used at maximum
maximum on
on the XO.OOl
XO.OO1 range.
control
63H
0-169
4-10
SECTION
SECTION V
V
REPLACEABLE PARTS
PARTS LIST
LIST
REPLACEABLE
NOTE:
NOTE:
Component parts
parts in
in the
the bridge
bridge section
section are
are not
not listed
listed because
because
Component
their replacement
replacement usually
usually must
must be
be followed
followed by
by adjustments
adjustments
their
that require
require specialized
specialized equipment
equipment and
and techniques.
techniques.
that
Power
Power Supply
Supply Section
Section
C20l
C202
C203
C204
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
3200 ~F at 40V
30/1 0 ~F at 475V
00 1 ~F at 400V
1000/1 000 ~F at 15V
283,155
283,154
236,001
283,131
D20l
D202
D203
D204
D205
D206
D207
D208
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
1 N538
1 N538
1 N538
1 N538
1N538
1N538
1N538
1 N538
532,008
532,008
532,008
532,008
532,008
532,008
532,008
532,008
F20l
F201
Fuse
Fuse (234Vac
(234V ac models)
models)
Fuse (117V
(117V ac
ac models)
models)
Fuse
0.6A,
V Buss MDL
0.6A1 250
250V.Buss
MDL 0.6
0.6
11.2A,
.2A, 125V
1 25V Buss
Buss MDL
MDL 11..2
:2
545,512
545,509
1201
Lamp
Lamp
6V,
6V, No. 47
47
545,101
J20l
Socket
Socket
12
12 Pin
Pin
474,106
L201
Choke
Choke
7H
440,001
P201
P202
Connector
Connector
Line
Line Cord
Cord
Plug
Plug
568,101
477,137
R20l
R202
R203
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
10KQ
3 05KQ
22Q
S201
Switch
Switch
SPST
SPST Toggle
Toggle
63H
a-169
PL-l
5%
5%
5%
1/2W
10 W
2 W
301,111
312,102
303,622
465,105
T202
T202
*T201
*T201
*T202
-
V201
V201
V202
V202
V203
Transformer, Power
Power
Transformer,
Power
Transformer, Power
Power
Transformer, Power
Tube
Tube
Tube
Tube
Tube
Tube
446,038
446,026
446,020
526,6BW4
526,OA2
526,OA2
6BW4
OA2
OA2
Section
Oscillator
Osci Ilator Emitter-Follower Section
**
Cl0l
Cl02
Cl03
Cl04
Cl05
Cl06
Cl07
Cl08
Cl09
CllO
Clll
C112
Cl13
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Variable,
Variable, 2 Sec. 10-410 pF/sec.
p~/sec.
0.022 ~FF at 400V
0.022
% Ceramic
Ceramic
22 pF
pF %
4.5-25 pF
Trimmer 4.5-25
pF Ceramic
Ceramic
0.056
0.056 tJF
pF at 200V
pF at 400V
0.01 tJF
0.5 tJF
pF at 100V
lOOV
0.5
pF at 350V
8 tJF
0.056 tJF
pF at 200V
0.056
0.056 pF
0.056
tJF at 200V
68 pF 5%
1.0 pF
1.0
tJF at 100V
100 pFat
100
tJF at 25V
275,131
234,033
220,113
281,000
236,006
234,021
234,034
283,126
236,006
236,006
200,031
236,007
283,105
JJ101
l 01
J102
Jl02
Connector
Connector
Plug
Plug
Coaxial
477,166
479,123
P l 01
Pl0l
PI02
Pl02
Connector
Connector
Receptacle
Receptacle
Coaxial
477,145
477,121
Q101
Q
lOl
Ql02
Q102
Q103
0104
0104
Transistor
Transistor
Transistor
Transistor
2N404A
2N404A
2N1605A
2Nl046
528,002
528,002
528,005
528,010
R
l 01
Rl0l
R102
Rl02
R103
Rl03
R104
Rl04
R105
Rl05
R106
Rl06
R107
R108
Rl08
R109
Rl09
RR110
llO
RRlll
l 11
R112
R1l2
R113
R1l3
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor,
Resistor, Var.
Var.
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
7.87KR
7.87KQ
78.7KQ
78.7KQ
7.87KQ
7.87KR
78.7KQ
78.7KR
1.5KQ
1.5KR
47KQ
25KQ
25
KR
10KQ
1
OKR
330Q
330R
330Q
330R
300KQ
300
KR
1 MegQ
KQ
1 KR
!
Usedonlyonserial
numbers below 634.
Used only on serial numbersbelow634.
63H
a-169
PL-2
0.5%
0.5%
0.5%
0.5%
5%
5%
5%.
5%
5%
5%
5%
5%
1!2W
1/2W
2 W
1!2W
1!4W
l!m
l/m
1/4W
1/2W
321,278
321,277
321,278
321,277
301,091
301,127
311 ,155
301,111
300,070
301,075
301,146
300,154
301,087
/
R114
R115
R116
R117
R118
R119
R120
R121
R122
R123
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
39KQ
39KR
4.7KQ
4.7KR
2.7KQ
2.7KR
10KQ
1 OKR
10KQ
1OKR
330Q
330R
47Q
47R
10Q
1OR
50Q
50R
1KQ
1KR
S101
Switch
Switch
4P DT
4PDT
466,128
THI01
Thermistor
Thermistor
65A 1
65Al
325,001
VI01
Tube
12AT7
1 2AT7
526,12AT7
5%
5%
5%
5%
5%
5%
5%
5%
5%
1/4W
1/4W
1/4W
1/4W
1/4W
2 W
l/m
2 W
lOW
1/2W
300,120
300,098
300,092
300,106
300,106
303,626
301 ,055
303,614
312,117
301 ,087
Pre-Am~lifierSection
Pre-Amplifier
0.22~F100V
10 ~F 6V
0.1 ~F 200V
0.1 ~F 200V
0.005 ~F 200V
C401
C402
C403
C404
C405
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
J401
Connector
477,167
P401
Connector
479,168
R401
R402
R403
R404
R405
Resistor
Resistor
Resistor
Resistor
Resistor
MegQ
22 MegR
MegQ
22 MegR
2.2KQ
2.2KR
470KQ
470KR
220KQ
220KR
V401
Tube
6AK5W
5%
5%
5%
5%
5%
236,005
283,130
230,116
230,116
230,121
1/2W
l/m
1/2W
1/2W
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
301,191
301 , 191
300,090
300,146
300,138
525,004
Tuned Detector Section
C501
C502
C503
C504
C506
C507
C508
C509
C510
C511
63H
a-169
.
Capacitor,
Capaci tor, Var
Var.
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
10/410 pF/sec.
pF/sec.
2 sec 10/410
Trimmer 7-45
7-45 pF
Trimmer 7-45
7-45 pF
Tri
mmer 5.5-1
Trimmer
5.5-18
8 pF
0.1
0.1 pF
~F 20ov
200V
0
.O1 pF
0.01
~F 200V
10 pF
V
~F 6
6V
0.1
0.1 pF
~F 200v
200V
0.1
0.1 pF
~F 200v
200V
8 pF
~F 350V
PL-3
275,131
275,114
275,114
281,001
230,116
234,027
283,130
230,116
230,116
283,126
J501
J502
J503
Connector
Connector
Connector
Coaxial
Coaxial
Coaxial
479,123
477,166
479,123
P501
P502
P503
Connector
Connector
Connector
Coaxial
Coaxial
Coaxial
477,121
477,145
477,121
R501
R502
R503
R504
R505
R506
R507
R508
R509
R510
R511
R512
R513
R514
R515
R516
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor, Var.
Var.
Resistor,
Resistor,
Resistor, Var.
Var.
Resistor
Resistor
7.87KQ
7.87KR
78.7KQ
78.7KR
7.87KQ
7.87KR
78.7KQ
78.7KR
47Q
47R
8.25KQ
8.25KR
15KQ
15KR
110KQ
OKR
1150Q
50R
MegQ
1 MegR
24KQ
24
KR
16.5KQ
16.5KR
5KQ
5KR
5KQ
5KR
1lKQ
KR
100KQ
1 OOKR
5501
Switch
4PDT
466,128
V501
Tube
6U8
526,6U8
0.5%
0.5%
0.5%
0.5%
5%
1%
5%
5%
5%
5%
5%
1%
5%
5%
11m
11m
1!2W
1!2W
11m
·l/m
11m
1/1 OW
1/1 OW
11m
1/4W
312,278
321,277
321,278
321,277
301,055
306,350
301,115
301, 111
301,067
301,159
301,120
306,385
311 ,169
311 ,169
301 ,087
300,130
Band Amplifier
Wide Band
C601
C602
C603
C604
C605
C606
C607
C608
C609
C610
C611
C612
C613
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
1000 pF
1000 pF
50 fJF 6V
0.1 fJF 200V
8 fJF 350V
0.1 fJF 400V
1000 pF
0.1 fJF 400V
10 fJF 6V
0.1 fJF 400V
0.1 fJF 200V
0.1 fJF400V
0.1 fJF400V
201,117
201,117
283,145
230,116
283,126
236,001
201,117
236,001
283,130
236,001
230,116
236,001
236,001
D601
D602
Diode
Diode
Diode
Diode
1 N58A
SG-3113
530,021
530,009
J601
J602
J603
Connector
Connector
Jack
Coaxial
479,123
477,166
479,114
63H
a-169
PL-4
LOO1
Coil
Coil
2.5 mH
400,014
M601
Meter
0-50 jJA
554,140
P601
Connector
Coaxial
Coaxial
477,121
ROO1
ROO2
R603
R604
R605
R606
R607
R608
R609
R610
R611
R612
R613
R614
R615
R616
R617
R618
R619
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resi
stor
Resistor
Resistor
Resistor
Resistor
Resistor,
Resistor
Resistor
Resistor
Resistor
Resistor,
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor,
470KQ
470KR
2.2
2,2 MegQ
MegR
470KQ
470KR
1 KQ
KR
18
18 KQ
KR
47
47 KQ
KC2
330Q
33022
470Q
470R
2.5 KQ
KR
470KQ
470K R
470KQ
470 K R
5KQ
5 KC?
1 MegQ
MegR
22KR
22KO
1 OOKR
100KO
470KQ
470 KC?
47KR
47KO
47KQ
47KR
50KQ
50 KR
63H
0-169
.
Var
Var.
Var.
Var.
Var.
PL-5
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
11m
11m
1!2W
l!m
1/2W
1/2W
11m
1!2W
1!10W
l!m
1!2W
2 W
11m
1
W
1/2W
11m
1/2W
11m
1/1 OW
301,151
301,167
301 ,151
301,087
301,117
301,127
301 ,075
301 ,151
311 ,128
301,151
301 ,151
311 ,200
301,159
302,133
301,135
301 ,151
301 ,127
301 ,127
311,120
INDUCTANCE
INDUCTANCE BRIDGE
BRIDGE REACTANCE
REACTANCE CHART
CHART
100Kn
,i"
10Kn
/0
.0,
cP~
"
IKn
/00
.0,
,0~
loon
/0
°0
.0,
,:r
(f)
~
::I:
Ion
0
'0
0
~,
~
00
"
In
q/N,
o.ln
o.orn
o.ooln
100e
I Kc
IKe
laKe
10 Kc
FREQUENCY
FREQUENCY
100Ke
100Kc
IMe
IMc
9,
4
Q
L
1000
h -Jln.}
Jlh mn.
mh-n.
(
h Kn.
Rs
Q Nomograph
Nomograph for
Q
700
INDUCTANCE BRIDGES
BRIDGES
INDUCTANCE
2
500
500
3
300
200
300
L
5
7
Rs
WHEN INDUCTANCE
INDUCTANCE
WHEN
SCALE IS
IS IN
IN
SCALE
USE RESISTANCE
RESlSfANCE
USE
SCALE IN
IN
SCALE
nh
NANOHENRIES, nh
MICROHMS, jln.
MICROHMS,
MICROHENRIES, jlh
MILLIOHMS.
MILLIHENRIES, mh
mh
MILLIHENRIES,
OHMS,
HENRIES,
KILOHMS, Kn.
K n
KILOHMS,
200
10
100
mn.
70
50
hh
n
n.
I
30
20
EXAMPLE
EXAMPLE·
IOKc
ff -= 10
Kc
L = 88 mh
mh
L'
10
R = 17SZ
R=17n.
CONNECT STRAIGHT
STRAIGHT EDGE
EDGE BETWEEN
BETWEEN 10
IOKc
AND
CONNECT
Kc AND
7
MEASURED INDUCTANCE
INDUCTANCE OF
OF 88mh.
MEASURED
mh,
POINT ON
ON PIVOT
PIVOT LINE.
LINE.
POINT
5
NOTE REFERENCE
REFERENCE
NOTE
CONNECT STRAIGHT
STRAIGHT EDGE
EDGE
CONNECT
BETWEEN REFERENCE
REFERENCE POINT
POINT AND
AND MEASURED
MEASURED SERIES
SERIES
BETWEEN
RESISTANCE OF
OF 17n..
17n.
RESISTANCE
AS 30.
30.
READ QQ AS
READ
3
10
2
7
500
700
1000
5
0.7
2000
0.5
3
IN AA FEW
FEW CASES
CASES AA MULTIPLYING
MULTIPLYING FACTOR
FACTOR FOR
FOR R.,
R,
IN
OTHER THAN
THAN THAT
THAT GIVEN
GIVEN IN
IN THE
THE ABOVE
ABOVE TABLE,
TABLE,
OTHER
WILL BE
BE NEEDED.
NEEDED.
WILL
3000
THlS MAY
MAY BE
BE DONE
DONE PROVIDED
PROVIDED
THIS
Q IS
IS DIVIDED
DIVIDED BY
BY THE
THE RATIO
RATIO OF
OF THE
THE MULTIPLIER
MULTIPLIER
THE Q
THE
USED, TO
TO THAT
THAT SUGGESTED
SUGGESTED IN
IN THE
THE TABLE.
TABLE.
USED,
0.3
5000
IN MICROHENRIES
MICROHENRIES AND
AND THE
THE R.
R, SCALE
SCALE IN
IN OHMS,
OHMS,
IN
INSTEAD OF
OF MILLIOHMS.
MILLIOHMS.
INSTEAD
7000
--l- I
EXAMPLE*
EXAMPLE'
L =159jlh,
159yh, and
and R.
Ra=50SZ.
USE THE
THE LL SCALE
SCALE
IOOKc,
ff == 100
Kc, L- SOn.. USE
2
10000
THE RATIO
RATIO OF
OF OHMS
OHMS TO
TO
THE
MILLIOHMS IS
IS 10~
10' AND
AND THE
THE INDICATE·D
IND1CATE.D QQ 0OFF 2X
2x10'
MILLIOHMS
10~
MUST BE
BE DIVIDED
DIVIDED BY
BY THIS
THlS FACTOR,
FACTOR, OR,
OR, Q.
0.2.2.
MUST
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Schematic
Schematic Diagram
Diagram Model
Model 63H
63H
til,
Drawing
83F
Drawing No.
No. 8301
830183f
(Serial number
(Serial
number 634
634 and
and above)
ab~ve)
Warranty
Boonton Electronics warrants its devices against defects in material and workmanship for a period of one (1) year from date of shipment provided they are used
under normal operating conditions as specified in Boonton Electronics installation
and maintenance instructions. This warranty shall not apply to any item which
shall have been repaired or altered by anyone, not authorized by the Seller, in any
way so as, in the judgment of the Seller, to affect its stability and reliability. This
warranty applies to all components, assemblies and material, except vacuum
tubes, panel lamps, fuses, batteries, and sealed assemblies which have been
opened. This warranty is made to the oliginal Purchaser only. In the event of any
breach of this warranty, the Purchaser shall give immediate notice thereof to the
Seller, stating in what manner an item is defective, and reasonable time shall be
given to the Seller to send a competent person to the Purchaser's premises to
remedy the difficulty or to remedy the difficulty at the Seller's premises. Failure
to give such notice shall be conclusive evidence of due fulfillment of the warranty on the part of the Seller and that an item is satisfactory to the Purchaser,
and in such event the Seller shall be released from. all liability under the warranty.
SHIPPING INSTRUCTIONS
If it becomes necessary to ship the instrument, the following steps should be
followed:
a. Wrap the instrument with heavy wrapping paper and seal the seams with gummed tape. Place in fibreboard carton large enough to permit three inches of
soft packing material between instrument and sides of box.
IMPORTANT NOTICE
Be sure to remove the shorting bar from the test terminals before packing.
Packing the instrument with the shorting bar in place can result in severe
damage to the test terminal assembly during shipment.
b.
Alternatively Boonton Electronics will provide an appropriate shipping con-
tainer and packing materials at nominal cost. These may be obtained by writing
to the Sales Department, Boonton Electronics Corporation, Route 287 at Smith
Road, Parsippany, New Jersey 07054.