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MART1 ELECTRONICS
P . Q . Box 6 6 1
Clebur;:e,
Texas 76031
645
-
4091
( A r e a 817)
INSTRUCTION MANUAL
RECEIVER
Model MR -30/150-170
P a g e 1.
Y
MR- 30/150-170 R E C E I V E R
MP.R T I -ELECTRONICS
C leburne, Texas
S P E C I F I C A THONS
Application
Sensitivity
.
F r e q u e n c y Range.
Selectivity
- .. .
Remote Pick-up
0 . 6 m i c r o v o l t s o r less f o r 20 db quieting.
. 150 - 172 m e g a c y c l e s .
- .. Minus 100 db a t p l u s o r m i n u s 32 kc; m i n u s 6 db o r
l e s s a t plus o r m i n u s 15 kc.
Spurious R e s p o n s e . * . k.11 s p u r i o u s and i m a g e r e s p o n s e s a t t e n u a t e d a t l e a s t
100 db.
P l u s o r m i n u s 2 db, 60 t o 7500 c y c l e s with matching
Overall Response .
t r ansmitter.
F r e q u e n c y Stability. . P l u s o r m i n u s 0 . 000570 with c r y s t a l oven.
T e m p e r a t u r e R a n g e . . Minus 40 d e g r e e C e n t i g r a d e t o p l u s 70 d e g r e e C e n t i g r a d e .
P l u s 8 VU a t 600 o h m s .
Audio Output.
* .
Signal s t r e n g t h and VU b r o u g h t out t o t e s t J a c k s . V i s u a l
...
Metering.
m e t e r i n g optional.
Tube Comp e m e n t . . . 15 r e q u i r e d . 8 tube t y p e s .
6BH6 - 1st L i m i t e r
6DS4 - 1st R F P.mp. ( N u v i s t o r )
6DS4 - 2nd R F 1-mp. ( N u v i s t o r ) - 6BH6 - 2nd L i m i t e r
6DS4 - 1st M i x e r ( N u v i s t o r )
6 k L 5 - Discriminator
6HS6 - 1st IF Amp.
12P-T7- N o i s e R e c t . &
6DS4 - H F O s c . T r i p . ( N u v i s t o r
R elay P.mp.
12P.T7 - 2nd M i x e r & LF O s c .
12AX7 - N o i s e Amp.
6HS6 - 2nd I F Amp.
6CG7 - 4-udio Amp.
OB2 - Voltage R e g .
6HS6 - 3 r d IF Amp.
10 -1/2" high, 19" wide; 9" deep.
Dimensions.
Panel Finish -Whammertone grey.
Weight ( n e t ) .
- . - .. 20 pounds.
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NOTE:
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Extended f r e q u e n c y r e s p o n s e t o 12,000 c y c l e s a v a i l a b l e upon s p e c i a l
o r d e r f o r $25. 00 additional.
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MARTI ELECTRONICS
INSTALLATION
OF
MR-30/150-170
RECEIVER
Clebnrne, Texas
Connect t e r m i n a l s 1 and 3 t o the r e m o t e input of your Console.
Connect t e r m i n a l 2
- t o a good ground.
Terminals 4 and 5 a r e u s e d only on two f r e q u e n c y m o d e l s .
6 and 7 m a y b e u s e d to o p e r a t e a n o t h e r ? d a y on a s i g n a l l a m p .
Terminals T h e s e t e r m i n a l s a r e connected t o the contacts of K-1 and a r e c l o s e d when
a s i g n a l is r e c e i v e d .
Connect t h e antenna to the coaxial connector m a r k e d "antenna."
connector i s a SO-239 and m a t e s with a PL-259.
The input
The r e c e i v e d should b e i n s t a l l e d i n a s t a n d a r d 19" r a c k t h a t is adequately
ventilated f o r b e s t o p e r a t i o n a n d tube life.
Connect the P o w e r C o r d t o a 117-123 Volt 50-60 cycle s o u r c e .
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MART1 ELECTRONICS
Cleburne, Texas
MR -30/150-170
R EC E I V E R
I n s t r u c t ion B o ok
The MR-30/150-170 VHF R e c e i v e r is a c r y s t a l c o n t r o l l e d dual
c o n v e r s i o n superhete'rodyne r e c e i v e r designed f o r o p e r a t i o n in the 150 - 172
m e g a c y c l e band.
E a c h r e c e i v e r i n c o r p o r a t e s 4 n u v i s t o r s , 10 tubes, and an OB2
The MR-30/150-170 R e c e i v e r h a s a p a s s band of plus o r minus
voltage r e g u l a t o r .
15 K c s and w i l l r e j e c t a l l s i g n a l s plus o r m i n u s 32 K c s . by at l e a s t m i n u s 100 db.
The r e c e i v e r f e a t u r e s two nuvistor R F s t a g e s , a 1st m i x e r , a 1st IF a m p l i f i e r ,
a 2nd m i x e r , two 2nd I F s t a g e s , two l i m i t e r s , a dual diode d i s c r i m i n a t o r , an
audio a m p l i f i e r , and a two tube squelch s y s t e m . The squelch s y s t e m o p e r a t e s
a s e n s i t i v e r e l a y f o r squelching t h e audio and a l s o p r o v i d e s a u x i l i a r y c o n t a c t s
f o r v i s u a l signaling of a r e c e i v e d signal.
C I R C U I T O P E R A T I O N - General
R F Amplifiers: The c a r r i e r s i g n a l s r e c e i v e d at the antenna a r e coupled through
a 52 ohm c o a x i a l t r a n s m i s s i o n line t o t h e Arltenna Input of the MR-30/150-170
R e c e i v e r . T h i s Antenna Input is fed to t h e cathode of the 1st R F Amplifier V-1,
a 6DS4 Nuvistor, operating a s a grounded g r i d a m p l i f i e r . T h e f i r s t R F A m p l i f i e r
p r o v i d e s s o m e amplification but p r i m a r i l y it p r o v i d e s an impedance matching
device and a s s o c i a t e d with L-1, L - 2 , and L - 3 p r o v i d e s a band p a s s f i l t e r s y s t e m .
The output of V-1 is c a p a c i t i v e coupled t o V - 2 , a 6DS4 Nuvistor, v i a t h e band
p a s s f i l t e r L-1, L-2, and L-3. L - 3 i s c a p a c i t i v e coupled a t a low-impedance
point and t h i s s i g n a l i s fed t o t h e cathode of V - 2 o p e r a t i n g a s a grounded g r i d
a m p l i f i e r . The output of V - 2 i s fed t o t h e m i x e r V-3 through a second band p a s s
f i l t e r consisting of L-4, L-5, and a s s o c i a t e d c a p a c i t o r s .
H F O s c i l l a t o r and T r i p l e r : T h e H F (high F r e q u e n c y ) o s c i l l a t o r V-4, a 6DS4
Nuvistor, is a c r y s t a l - c o n t r o l l e d t r i o d e o s c i l l a t o r utilizing the cathode and the
g r i d of the 6DS4 (V-4) a s an o s c i l l a t o r and the p l a t e load being tuned t o the
t h i r d h a r m o n i c of t h e c r y s t a l o s c i l l a t o r frequency. The c o n t r o l c r y s t a l f r e quency is between 45.6666 M c s and 55.6666 M c s . depending upon the exact c a r r i e r
frequency a s s i g n e d t o t h e r e c e i v e r . L - 5 and L - 6 and a s s o c i a t e d c a p a c i t o r s
provide a band p a s s f i l t e r in the p l a t e of V-4 and a r e coupled t o t h e 1st m i x e r
V-3 with a small c a p a c i t a n c e .
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F i r s t Mixer: The output of the 2nd R F a m p l i f i e r i s c a p a c i t i v e coupled t o the
g r i d of the 1st m i x e r (V-3) a 6DS4, a s well a s t o t h e output of the H F o s c i l l a t o r
V-4. Hetel'odyning o c c u r s within the f i r s t m i x e r and t h e d i f f e r e n c e between
t h e c a r r i e r f r e q u e n c y and t h e H F o s c i l l a t o r output f r e q u e n c y i s u s e d a s t h e
f i r s t m i x e r output. T h e 1st I F f r e q u e n c y i s 7. 0 m c s .
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MART1 ELECTRONICS
Cleburne, T e x a s
C r y s t a l and C a r r i e r F r e q u e n c y Determination: When t h e exact c a r r i e r frequency
a s s i g n e d t o t h e r e c e i v e r i s known, the high-frequency o s c i l l a t o r c a r r i e r
frequency c a n be c a l c u l a t e d a s follows:
= f
- 7 . 0 mc
f l
C
MR-30/15OPl7O
RECEIVER
3
where:
f
f
C
=
c r y s t a l frequency
=
c a r r i e r frequency
7. 0 m c . = 1st I F frequency
3
= multiplication
F i r s t IF Amplifier: The output of the f i r s t m i x e r is applied t o a high "Q"
F i l t e r consisting of L-8, L - 9 , then to t h e c o n t r o l g r i d of V-6, a 6HS6, then
L-10 t o the g r i d of t h e 2nd M i x e r . L-8, L-9, and L-10 f o r m a v e r y s e l e c t i v e
band p a s s f i l t e r at 7. 0 m c s .
L F O s c i l l a t o r : The L F (low frequency) o s c i l l a t o r , V - 7 A , i s a modified P i e r c e
c r y s t a l - c o n t r o l l e d o s c i l l a t o r . The frequency of t h i s o s c i l l a t o r is approximately
7. 455 M c s . T h e output of t h i s o s c i l l a t o r i s c a p a c i t i v e coupled to the 2nd M i x e r
G r i d , V-7B. V - 7 is a 12AT7, one half of which i s u t i l i z e d a s t h e L F O s c i l l a t o r
and t h e other t r i o d e s e c t i o n a s t h e 2nd M i x e r .
Second M i x e r : Both the 7 . 455 M c s . output of t h e LF O s c i l l a t o r and t h e 7 M c s .
output of t h e f i r s t IF Amplifier a r e applied t o the g r i d of the second m i x e r tube,
V - 7 B . Heterodyning o c c u r s within the second m i x e r and t h e d i f f e r e n c e (455Kcs)
i s u s e d a s t h e second m i x e r output. The output of t h e second m i x e r i s capacitive
coupled to F1-1, a v e r y s e l e c t i v e b a n d - p a s s f i l t e r , and then to the g r i d of V-8,
a 6HS6, the 2nd I F Amplifier. F1-1 i s a fixed tuned b a n d - p a s s f i l t e r , with the
c e n t e r frequency being 455 K c s . , and i s the p r i m e d e t e r m i n a t e of the p a s s band
of t h e MR-30/150-170 R e c e i v e r .
Second IF Amplifiers: The output of F i l t e r F1-1 i s applied t o t h e G r i d of V-8,
and 1st in a s e r i e s of two IF A m p l i f i e r s at 455 K c s . The output of V-8, a 6HS6,
i s fed to t h e g r i d of V - 9 , a 6HS6, v i a the f i l t e r c o n s i s t i n g of L-12, a doubletuned f i l t e r . T h e output of V - 9 , a 6HS6, i s fed t o t h e g r i d of the 1st l i m i t e r ,
V-10, v i a L-13, another b a n d - p a s s f i l t e r at 455 K c s .
L i m i t e r s and D i s c r i m i n a t o r s : The two l i m i t e r s t a g e s , V-10, and V-11 (both 6BH6)
clip t h e tops and the bottoms of the incoming s i g n a l s t h e r e b y eliminating n o i s e
peaks in the f o r m of amplitude modulation. The output of t h e s e l i m i t e r s a r e 455 Kcs.
T h e output of the second l i m i t e r , V-1, i s applied t o the d i s c r i m i n a t o r , V-12, a 6AL5
through T r a n s f o r m e r L-14 which i s tuned t o 455 K c s f o r plus o r m i n u s 15 Kcs.
acceptance. The d i s c r i m i n a t o r c i r c u i t r y t r a n s f o r m s t h e f r e q u e n c y deviations into
c o r r e s p o n d i n g amplitude v a r i a t i o n s , t h e r e b y detecting the audio signal.
0
MR -30/150-170
RECEIVER
Page 4
MARTI ELECTRONICS
Cleburne, Texas
L i m i t e r s & D i s c r i m i n a t o r s (continued): Following an isolation r e s i s t o r and
coupling c a p a c i t o r i s a d e - e m p h a s i s network which a t t e n u a t e s the high f r e q u e n c i e s
while emphasizing the low f r e q u e n c i e s ; t h i s attenuation of t h e high f r e q u e n c i e s i s
n e c e s s a r y b e c a u s e of the i n h e r e n t p r e - e m p h a s i s c h a r a c t e r i s t i c of t h e p h a s e
modulato'r i n the F M t r a n s m i t t e r being r e c e i v e d .
0
Audio Amplifier: The audio a m p l i f i e r tube V-13 ( a 6CG7) i s connected a s a two
s t a g e a m p l i f i e r with i n v e r s e feedback t o lower d i s t o r t i o n . The n o r m a l output
l e v e l i s plus 8 VU, into a 600 ohm line. The output p l a t e of V-13 i s connected
to Audio T r a n s f o r m e r T - 3 t o a 600 ohm output. T h e 600 ohm output i s connected
t o T e r m i n a l s 1 and 3 on the r e c e i v e r t e r m i n a l b o a r d v i a the 4. 5Kcs L P F i l t e r
Switch and the 20 DB P a d F i l t e r Switch. With the 4. 5Kcs. L P F i l t e r and t h e
20 DB pad switches in the "OFF" gosition, t h e f u l l plus 8 VU with a r e s p o n s e
up to 7. 5Kcs. i s available a t t e r m i n a l s 1 and 3 on the R e c e i v e r T e r m i n a l s t r i p .
If t h e output of the R e c e i v e r i s to be connected t o a l o c a l Audio Console, we
suggest placing the 20 DB P a d Switch in the pad i n "IN" position s o a s t o provide
the p r o p e r l e v e l f o r t h e console. T h i s w i l l provide a b e t t e r s i g n a l t o noise
r a t i o than would lowering the audio gain c o n t r o l . The audio output l e v e l of t h e
r e c e i v e r should always be between plus 4 VU and plus 8 VU and t h e n e c e s s a r y
l e v e l at the input t o the load ( s u c h a s an Audio Console) be by fixed pads.
When sigfials a r e being r e c e i v e d by the MR-30/150-170 R e c e i v e r below t h r e e (3)
m i c r o v o l t s , approximately 8 DB of s i g n a l - t o - n o i s e i m p r o v e m e n t c a n be obtained
by placing the 4. 5Kcs. L P F i l t e r Switch in the "IN" position. T h i s will attenuate
audio f r e q u e n c i e s above 4500 c y c l e s but will s t i l l be equal to a v e r y good c l a s s
telephone l i n e s and w i l l i m p r o v e r e c e p t i o n v e r y noticeably ( a p p r o x . 9 DB).
Squelch C i r c u i t : The squelch c i r c u i t is designed to o p e r a t e when a s i g n a l i s
r e c e i v e d . T h e squelch c i r c u i t c o n s i s t s of two n o i s e a m p l i f i e r s , V-14A and
V-l4B, a 12AX7, a n o i s e r e c t i f i e r , V-15A and a r e l a y a m p l i f i e r tube V-15B.
V-15A and V-15B a r e t h e two s e c t i o n s of a 12AT7. With no c a r r i e r r e c e i v e d ,
t h e n o i s e voltages appearing at t h e d i s c r i m i n a t o r a r e amplified by t h e n o i s e
a m p l i f i e r s and applied to the cathode of n o i s e r e c t i f i e r V-15A. The r e c t i f i e d
c u r r e n t flows through V-15A; develops a negative g r i d b i a s which cuts off r e l a y
a m p l i f i e r V-15B and thus p r e v e n t s the r e l a y in the p l a t e of V-15B f r o m
operating: The squelch c o n t r o l ( P - 3 ) a d j u s t s the b i a s on the cathode of n o i s e
a m p l i f i e r V-1433; t h e r e b y setting the l e v e l at which n o i s e peaks d r i v e V-14B
into conduction.
When a s i g n a l is r e c e i v e d , n o i s e quieting o c c u r s and t h e n o i s e a m p l i f i e r (V-14B)
d r o p s below t h e l e v e l r e q u i r e d t o d r i v e t h i s tube into conduction. With V-14B
cut off, noise r e c t i f i e r V-15A a l s o c e a s e s t o conduct; causing negative b i a s to
d i s a p p e a r at the g r i d of V-15B allowing t h e tube t o conduct and thus o p e r a t e t h e
squelch r e l a y in t h e plate of V-15B. A f i l t e r network in t h e g r i d c i r c u i t of
n o i s e a m p l i f i e r V-14A r e j e c t s voice f r e q u e n c i e s f r o m t h e n o i s e a m p l i f i e r c i r c u i t .
MR
- 30/150
-170
RECEIVER
P a g e 5.
MAR T I ELECTRONICS
Cleburne, Texas
R e c e i v e r Alignment P r o c e d u r e - General: The r e c e i v e r is shipped f r o m t h e
f a c t o r y with a l l tuning a d j u s t m e n t s p r e - s e t t o the exact frequency ( o r f r e q u e n c i e s )
f o r which i t w a s o r d e r e d and w i l l r e q u i r e no f u r t h e r alignment u n d e r n o r m a l
operating conditions. However, a p e r i o d i c check of t h e r e c e i v e r s e n s i t i v i t y
should b e m a d e using the p r o c e d u r e outlined in the r e c e i v e r alignment c h a r t .
A Change in operating frequency, m a j o r r e p a i r work, o r d a m a g e during
shipment m a y n e c e s s i t a t e r e - a l i g n m e n t of the e n t i r e r e c e i v e r . The following
p a r a g r a p h s and t h e r e c e i v e r alignment c h a r t p r e s e n t a c o m p l e t e alignment
p r o c edur e o
Tool and Equipment R e q u i r e d
1. Insulated tuning tool.
2 . Signal G e n e r a t o r M e a s u r e m e n t C o r p . Model 560-FM; o r equivalent.
3 . C a l i b r a t e d frequency indicator o r c r y s t a l - c o n t r o l l e d o s c i l l a t o r covering
455 K c s and 7. 0 m c with an a c c u r a c y of a t l e a s t 0. 005%.
4. AC VTVM o r Noise and b i s t o r t i o n Equipment.
5. VTVM - RCA Senior Voltohmist.
-
MR - 30/150
- 170 R E C E I V E R
ALIGNMENT
1.
MART1 ELECTRONICS
PROCEDURE
Remove c r y s t a l X - 2 . Then, connect a 455 K c s . Signal S o u r c e to t h e input
of F L B P , ( J u n c t i o n of F L B P and C-39). T h i s Signal S o u r c e should have
a n a c c u r a c y of a t l e a s t 005%0, T h e Signal S o u r c e should b e connected to
the F L B P input through a s m a l l c a p a c i t o r , ( A T y p i c a l value - - 47 uuf).
With a VTVM connected to the WHITE T e s t Point ( 1 s t L i m i t e r G r i d ) ,
a d j u s t t h e s i g n a l s o u r c e output s o t h e indicated voltage on t h e VTVM w i l l
be a t l e a s t 3 v o l t s . Now, a d j u s t L-12, top & bottom s l u g s , and L-13
T O P slug only, f o r m a x i m u m indicated voltage. In t h e tuning p r o c e s s
t h e output of t h e s i g n a l s o u r c e should be r e d u c e d t o k e e p t h e indicated
voltage within t h e 3 t o 5 volt l i m i t s . The bottom slug of L13 i s not u s e d
i n t h i s m o d e l r e c e i v e r . T h e a d j u s t m e n t of t h e bottom slug w i l l have v e r y
l i t t l e effect on the m e a s u r e d voltage on t h e WHITE T e s t P o i n t .
2.
Adjust t h e t.op slug of L-14 ( D i s c r i m i n a t o r Secondary) u n t i l it is n e a r t h e top
of t h e can. Then, with t h e VTVM connected to t h e GREEN T e s t Point
( D i s c r i m i n a t o r P r i m a r y ) a d j u s t t h e Bottom Slug of L14 for m a x i m u m indicat e d voltage. T h i s should b e between. 12 and 17 v o l t s .
3.
With t h e VTVM connected to t h e BLUE T e s t Point ( D i s c r i m i n a t o r Secondary)
a d j u s t t h e top slug of L-14 for z e r o voltage a s indicated on t h e VTVM. T h e
455 K C IF and the D i s c r i m i n a t o r a r e now p r o p e r l y a d j u s t e d f o r s e n s i t i v i t y .
4.
I n s t a l l c r y s t a l X - 2 i n t h e c r y s t a l socket. Then, connect a 7 . 0 M c . Signal
S o u r c e to t h e junction of L-5, C-19 and C-20 through a s m a l l c a p a c i t o r
with a t y p i c a l value of 5 uuf. With t h e VTVM connected t o t h e WHITE T e s t
Point, a d j u s t t h e s i g n a l s o u r c e output s o t h e indicated voltage w i l l b e between 3 and 5 volts. T h e frequency of t h e 7 . 0 Mc s o u r c e c a n b e checked
by connected t h e VTVM t o the BLUE T e s t Point. A l l a d j u s t m e n t s m a d e in
t h e alignment of t h e r e c e i v e r f r o m t h i s point on should always h a v e t h e
s i g n a l on exact f r e q u e n c y . The s i g n a l s o u r c e c a n always be checked by
checking t h e VTVM voltage on BLUE T e s t Point. It w i l l b e z e r o volts with
a n "ON" f r e q u e n c y signal. With t h e VTVM on t h e WHITE T e s t Point, a d j u s t L-8, L-9 a n d L-10 (both top a n d bottom s l u g s ) f o r m a x i m u m indicated
voltage, being c e r t a i n t o a d j u s t t h e s i g n a l s o u r c e output to m a i n t a i n t h e
indicated voltage between 3 and 5 v o l t s . T h e a d j u s t m e n t of L-8, L-9 and
L-10 should be r e p e a t e d a t l e a s t two t i m e s .
5.
Now, with t h e VTVM on the RED T e s t Point and t h e v a r i a b l e c a p a c i t o r
C-68 a d j u s t e d t o a p p r o x i m a t e l y 50% capacity, a d j u s t L-6 and L - 7 f o r m a x i m u m
indicated voltage. After L-6 and L-7 h a v e b e e n a d j u s t e d f o r m a x i m u m voltage,
then C-68 ( a 4 to 30 uuf t r i m m e r ) c a n b e a d j u s t e d f o r m a x i m u m voltage a s
indicated on VTVM. T h e indicated voltage on VTVM should be between . 6
Volts and 1 0 Volts.
0
a
a
MR
30/150-170
RECEIVER
MART1 ELECTRONICS
Cleburne, Texas
A L I G N M E N T P R O C E D U R E (continued)
Now connect a n "ON" f r e q u e n c y s i g n a l s o u r c e to t h e Antenna Input
6.
Connector J-1, a c o a x i a l connector SO-239. Then, with the VTVM connected
to the WHITE T e s t P o i n t , a d j u s t L-1, L - 2 , L-3, L - 4 and L - 5 f o r m a x i m u m
indicated voltage being c e r t a i n to a d j u s t t h e output of t h e "ON" frequency
s i g n a l s o u r c e t o m a i n t a i n between 3 and 5 v o l t s on VTVM and frequently
checking t h e Signal S o u r c e frequency by checking voltage on BLUE T e s t P o i n t .
With t h e "ON" f r e q u e n c y s i g n a l s o u r c e connected to J-1 and t h e VTVM on
WHITE T e s t P o i n t , now r e - c h e c k a d j u s t m e n t of L - 8 , L - 9 and L-10 f o r m a x i m u m indicated voltage on VTVM. Be c e r t a i n the s i g n a l s o u r c e is exactly on
frequency. Now P--1, a voltage c o n t r o l in the s c r e e n of V - 6 , c a n be a d j u s t e d
s o with a n input s i g n a l of . 5 m i c r o v o l t s the VTVM when connected t o the
WHITE T e s t P o i n t will indicate 3 v o l t s .
7.
The ORANGE T e s t P o i n t i s u s e d only i n t h e event of s t r o n g s i g n a l s .
T h i s t e s t point i s u s e d f o r s i g n a l l e v e l indication only. With a V T V M o r a
50 m i c r o a m p e r e m e t e r connected between ORANG& T e s t P o i n t and GROUND,
a convenient method of indication of s i g n a l s t r e n g t h i s a v a i l a b l e .
8.
Now apply a n "ON" frequency signal, within . 000.2% of d e s i r e d frequency,
f r o m a n e x t e r n a l s o u r c e s u c h a s a f r e q u e n c y m e t e r on a t r a n s m i t t e r with a
known f r e q u e n c y . T h e m e a s u r e d voltage with the VTVM on the BLUE T e s t
P o i n t should be within one volt. The r e c e i v e r c a n then be a d j u s t e d t o exact
frequerrcy by a slight a d j u s t m e n t of C - 6 8 ( a 4 -30 c e r a m i c t r i m m e r located
u n d e r c h a s s i s on the c r y s t a l socket f o r 0-1).
Then, apply a modulated s i g n a l f r o m the d e s i r e d t r a n s m i t t e r s u c h
a s a M a r t i E l e c t r o n i c s Model M-30B that i s a d j u s t e d f o r 7. 5 K c s . deviation
with a 1000 c y c l e tone, Then with n o i s e and d i s t o r t i o n equipment a c r o s s t h e
output of the MR30/150-170 t e r m i n a l s #1 & #3, a d j u s t the p r i m a r y and
s e c o n d a r y of L-14 f o r m i n i m u m d i s t o r t i o n , being c e r t a i n that t h e voltage!
indicated on t h e VTVM a t BLUE T e s t P o i n t i s z e r o voltage. B e c e r t a i n the
t r a n s m i t t e r i s on t h e exact d e s i r e d frequency b e f o r e any a d j u s t m e n t s a r e
attempted.
9.
Now, wi.th a s i g n a l s o u r c e such a s a n a d j u s t a b l e s i g n a l g e n e r a t o r ,
10
a d j u s t the squelch a d j u s t m e n t ( P - 3 ) s o the squelch w i l l o p e r a t e on . 4 m i c r o v o l t s .
Y
11.
All r e a d i n g s on t h e VTVM a r e m a d e with the c o m m o n p r o b e t o ground
12
and all r e a d i n g s a r e negative except on BLUE T e s t P o i n t and the voltage a t
t h i s point could be e i t h e r positive o r negative according to f r e q u e n c y of the
r e c e i v e d signal.
D
0
T h e r e c e i v e r is now p r o p e r l y aligned and a d j u s t e d for best o p e r a t i o n .
P A R T S LIST
MR
30/150-170
MARTI ELECTRONICS
Cleburne, Texas
RECEIVER
FILTERS
F i l t e r , B a n d - P a s s , fixed tuned, 455 k c s , Motorola SK-9484W.
BPI
CE
c2
C2A
c3
c4
c5
.
.
66
c7
C8
c9
.
c 10
c 11
c 12
C 13
C 14
c 15
C 16
C 17
C 18
c 19
c 20
621
c22
C23
c29
C30
C31
C32
c33
c34
c35
C36
c37
C38
c 39
C40
C41
C 42
.
.
.
c24
C25
C26
c 27
c 28
CAPACITORS
C a p a c i t o r , f i l t e r , 80-80-60mfd9 300 V.
C a p a c i t o r , d i s c a p , OOlmfd, 500V.
C a p a c i t o r , d i s c a p , 47mmfd, 600 V.
C a p a c i t o r , d i s c a p , . OOlmfd, 500 V.
C a p a c i t o r , f e e d - t h r u , OOlmfd, 500 V . , A e r o v o s #7523.
Same.
C a p a c i t o r , t u b u l a r , 3.9 mmfd, 5%, 500 V.
C a p a c i t o r , d i s c a p , 5mmfd, 570, 500 V.
C a p a c i t o r , t u b u l a r , 3.9mmfd, 5%, 500 V.
C a p a c i t o r , d i s c a p , lOmmfd, lo%, 500 V,
C a p a c i t o r , d i s c a p , OOlmfd, 500 V.
C a p a c i t o r , f e e d - t h r u , OOlmfd, 500 V . , Aerovox #7523.
Same.
C a p a c i t o r , t u b u l a r , 3. Smmfd, 57'0, 500 V.
C a p a c i t o r , t u b u l a r s , 7. 8mmfd, 570, (Two 3. 9mmfd i n p a r a l l e l . )
C a p a c i t o r , d i s c a p , OOlmfd, 500 V.
Same.
C a p a c i t o r , t u b u l a r , . 2 7 m m f d , 570, 500 V.
Same.
C a p a c i t o r , tubular, 12mmfd. 1070, 500 V.
C a p a c i t o r , t u b u l a r , 1. Ommfd, 570, 500 V.
C a p a c i t o r , d i s c a p , 22mmfd, 5%, 500 V.
C a p a c i t o r , t u b u l a r , 3. Smmfd, 57'0, 500 V.
C a p a c i t o r , d i s c a p , . OOlmfd, 500 V.
Not u s e d i n t h i s model.
c a p a c i t o r , t u b u l a r , 3.9mmfd9 57'0~500 V.
C a p a c i t o r , tubular, 12mmfd, 1070, 500 V.
C a p a c i t o r , d i s c a p , OOlmfd, 500 V.
C a p a c i t o r , d i s c a p , 5mmfd, 5%, 500 V.!
Capacitor, feed-thru,
OOlmfd, 500 V, Aerovox #7523.
Same.
C a p a c i t o r , d i s c a p , 005mfd, 1000 V.
C a p a c i t o r , discap, OOlmfd, 500 V.
Same.
C a p a c i t o r , d i s c a p , 22mmfd, 5%, 500 V.
C a p a c i t o r , t u b u l a r , 1. Ommfd, 570, 500 V.
C a p a c i t o r , d i s c a p , Olmfd, 1000 V.
C a p a c i t o r , d i s c a p , 47mmfd, 600 V.
Same.
C a p a c i t o r , d i s c a p , Olmfd, 1000 V.
S 'ame.
Same.
Same.
,
.
.
e
e
.
.
PARTS LIST
MR-30/150-170 R E C E I V E R
ec
43
c44
c45
C46
c47
C 48
c49
C 50
C51
C 52
c53
c 54
c55
C56
c 57
C58
c 59
C 60
C61
C 62
C63
C64
C65
C66
C67
C 68
C 69
C 70
C71
C72
c 73
c74
c75
C 76
c77
C78
c79
C80
C81
C 82
C83
C84
C 85
C86
MARTI ELECTRONICS
Cleburne, Texas
CAPACITORS (continued)
C a p a c i t o r , d i s c a p . 22mmfd, 570, 500 V.
C a p a c i t o r , d i s c a p , 47mmfd, 600 V.
C a p a c i t o r , d i s c a p , . 0 0 1 mfd, 500 V.
C a p a c i t o r , d i s c a p , . Olmfd, 1 0 0 0 V.
Same
C a p a c i t o r , d i s c a p , 47 m m f d , 600 V.
C a p a c i t o r , d i s c a p , . Olmfd, 1000 V.
C a p a c i t o r , d i s c a p , . 0 0 1 mfd, 600 V.
C a p a c i t o r , d i s c a p , . 01 mfd, 1000 V .
Same
C a p a c i t o r , d i s c a p , 22mmfd, 570, 500 V.
C a p a c i t o r , d i s c a p , . 01 mfd, 1000 V
Same
C a p a c i t o r , d i s c a p , 470 m m f d , 1070, 1 0 0 0 V.
Same
Same
C a p a c i t o r , d i s c a p , . 0 2 mfd, 2070, 1 0 0 0 V.
C a p a c i t o r , . 05 mfd, 400 V
Same
C a p a c i t o r , d i s c a p , . 0 0 5 mfd, 1000 V
C a p a c i t o r , 25 mfd, 15 V
C a p a c i t o r , d i s c a p , 10 mmfd, 500 V ( U s e d on d u a l f r e q u e n c y m o d e l only)
C a p a c i t o r , v a r i a b l e , 4-30mmfd, R e l i a n c e #TS2A ( U s e d on D. F. Model o
C a p a c i t o r , d i s c a p , 001 mfd, 500V ( U s e d on d u a l f r e q u e n c y m o d e l only)
Same
C a p a c i t o r , v a r i a b l e , 4-30mmfd, R e l i a n c e #TSZA
C a p a c i t o r , d i s c a p . , 005 mfd, 1 0 0 0 V
C a p a c i t o r , d i s c a p , lOmmfd, 570, 500 V
C a p a c i t o r , d i s c a p , 3.'9 m m f d , 570, 500V ( O m i t t e d on d u a l f r e q u e n c y mod
C a p a c i t o r , t u b u l a r , , 2 7 m m f d , 570, 500 V
C a p a c i t o r , discap, 3 . 9 m m f d , 570, 500 V
C a p a c i t o r , d i s c a p , . 0 0 1 mfd, 500 V
D i s t r i b u t i v e capacity a c r o s s c o i l i n L7
C a p a c i t o r , bmmfd, 500V ( O n e 5mmfd a n d one l m m f d i n p a r a l l e l )
Not u s e d i n t h i s m o d e l
Not u s e d in t h i s m o d e l
C a p a c i t o r , t u b u l a r , , 25mfd, 200 WVDC
C a p a c i t o r , f e e d - t h r u , OOlmfd, 500V, Aerovox #7523
Same
Same
Same
C a p a c i t o r , d i s c a p , 470 m m f d , 2570, 500 V
Same
C a p a c i t o r , d i s c a p , . 01 mfd, lOOOV
PARTS LIST
0
M A R T I E L E Z TR ONICS
Cleburne, Texas
M R 3 D / 1 5 @- 1 7 0 R E C E I V E R
CAPACITORS (cantinued)
C a p a c i t o r , d i s c a p , 47 mmfd, 600V.
C87
C a p a c i t o r , discap, 22mmfd. 5% 500V.
C88
C a p a c i t o r , discap, 470 m m f d , 5%, 500V.
C89
Same.
C90
C a p a c i t o r , . 05 mfd, 500V.
C91
Capacitor,
discap, . O O l mfd, 500V.
C92
C a p a c i t o r , Smfd, 25V, , APD-016.
c93
Capacitor,
d i s c a p , 001 mfd, 500V.
c94
Same.
c95
Same.
C96
C a p a c i t o r , feed-thsu,
001 mfd, 500V. , Aerovox #7523.
c97
S
a
m
e
.
C98
Same.
c99
ClOO
Same.
ClOl
Same.
DIODE ~ E C T I F I E R . ~ .
D1
R e c t i f i e r , silicon, 800 PIV, 500 ma., E r i e ED -3010
D2
Same.
FUSES
F1
F u s e , 3AG, 2. 5 Amp., sloAblow.
.
.
JACKS
J1
J a c k , #SO-239.
RELAYS
K1
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
0
Relay, 3.1 MADC, 10K o h m s , Cont. lA, 29
A2420 -408 - 4L.
VDC, A m e r i c a n Z e t t l e r
INDUCTORS
F i l t e r , b a n d - p a s s , 4 t u r n s #20 w i r e , double- s p a c e d on National C o i l
F o r m # P N C F - 2 - B with C809 slug.
Same.
S a m e , except with t a p at 3/4 t u r n f r o m ground s i d e .
S a m e as L1 and L2.
S a m e as L1 and L2,
S a m e as L1 and L2.
F i l t e r , band - p a s s , 3 t u r n s #20 w i r e , double-spaced on National C o i l
form #PNCF-Z-B with C809 slug.
F i l t e r , IF, 7 m c . , Radio I n d u s t r i e s &O-15382-1.
Same.
Same.
Not u s e d in this model.
PARTS LIST
MR
L2 0
L21.
L22
RECEIVER
INDUCTORS (continued)
F i l t e r , b a n d - p a s s , 455 k c s . , R a d i o I n d u s t r i e s #EO-15695.
Same.
F i l t e r , d i s c r i m i n a t o r , 455 k c s . R a d i o I n d u s t r i e s #EO-15694-RI.
F i l t e r , choke, 1. 8 uh. 1000 ma. O h m i t e #2-144.
F i l t e r , choke, 1 uh. 900 ma. , Dalevan #1840-10.
Same.
\
Same.
F i l t e r , choke, 3. 9 uh. , 1130 ma. , D e l e v a n #1840-20. ( U s e d on dualf r e q u e n c y only. )
F i l t e r , choke, 3. 9 u h . , 1130 ma. Delevan #1840-20.
F i l t e r , choke 3 h y . , 110 m a . #2COO.
Same.
01
OVENS
Oven, 12. 6 volt, O v e n a i r e #SA-2.
P2
P3
POTENTIOMETERS
P o t e n t i o m e t e r , 500K o h m s , ML-5545.
P o t e n t i o m e t e r , 25K o h m s , ML-5544.
PL1
Note:
PILOT LAMPS
P i l o t l a m p , 12 volt, D r a k e #5100-182.
U s e G E #756 r e p l a c e m e n t bulb.
L12
L13
L14
L15
L16
L17
L18
L19
R1
R2
R3
R4
R5
R6
R7
R8
R9
R 10
R 11
R 12
R 13
R 14
R 15
R 16
R 17
R 18
R 19
30/150-170
MAR TI E L E G TR ONIC S
Cleburne, Texas
RESISTORS
R e s i s t o r , 10K ohm, 1 watt, 570,
Same.
R e s i s t o r , lOOK ohm, 1/2 watt, 50/00.
R e s i s t o r , 470K ohm, 1/2 watt, 5 7 0 ~
R e s i s t o r , 47K ohm, 1/2'watt, 50/00.
R e s i s t o r , 27K ohm, 1/2 watt, lo%.
R e s i s t o r , 47K ohm, 1/2 watt, 5 7 0 ~
Same.
Same.
R e s i s t o r , 150K ohm, 1/2 watt, 1 0 ~ 0 .
R e s i s t o r , 47.00 o h m 1/2 watt, 5 7 0 ~
R e s i s t o r , 68 ohm, 1/2 watt, 1070.
R e s i s t o r , 27K ohm, 1/2 watt, 10%.
R e s i s t o r , 10K ohm, 1 watt, 5700
R e s i s t o r , 560 ohm, 1/2 watt, 5 7 0 ~
R e s i s t o r , 47K ohm, 1/2 watt, 570R e s i s t o r , 470K ohm, 1/2 watt, 570.
R e s i s t o r , 47K ohm, 1/2 watt, 570~
R e s i s t o r , 10K ohm, 1/2 watt, 570.
P A R T S LIST
MR
30/150-170
R20
R 21
R 22
R23
R24
R25
R26
R27
R28
R 29
R 30
R31
R 32
R 33
R34
R35
R 36
R 37
R38
R39
R 40
R41
R 42
R 43
R44
R 45
R 46
R 47
R48
R 49
R50
R51
R 52
R53
R 54
R55
R56
R57
R58
R59
R 60
R 61
R 62
R63
R64
R 65
Resistor,
Resistor,
R e sis t o r ,
Resistor,
R e sis t o r ,
Resistor,
R e si s t o r ,
R e s is t o r ,
Resistor,
R e sis t o r ,
R e s is t o r ,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Same.
Same.
Resistor ,
Resistor,
Same.
Resistor,
Resistor,
Resistor,
R esistor ,
Same.
Resistor,
Resistor,
Resistor,
Resistor,
Resistor;
Resistor,
R es i s t o r ,
R e sis t o r ,
R e s istor,
Same.
Resistor,
Resistor,
R esis t o r ,
Resistor,
R e s i st o r ,
Resistor,
R e s i st o r ,
Same.
MARTI ELECTRONICS
Cleburne, Texas
RECEIVER
R E S I S T 0 R S (continued)
@
I
2200 ohm, 1/2 watt, 570.
4700 ohm, 1/2 watt, 570.
470K ohm, 1/2 watt, 5y0.
lOOK ohm, 1/2 watt, 570.
68 ohm, 1/2 watt, 1070.
68K ohm, 1 watt, 10%.
1800 ohm, 1/2 watt, 10%.
22K ohm, 1/2 watt, 570.
47K ohm, 1/2 watt, 570.
150K ohm, 1/2 watt, 10%.
22K ohm, 1/2 watt, 5%.
68 ohm, 1/2 watt, 1070.
68K ohm, 1/2 watt, 10%.
22K ohm, 1/2 watt, 570.
1800 ohm, 1/2 watt, lo%,
47K ohm, 1/2 watt, 570.
lOOK ohm, 1/2 watt, 570.
27K ohm, 1/2 watt, 10%.
22K ohm, l,watt, 10%.
47K ohm, 1/2 watt, 570,
15K ohm, 1 watt, 570.
4700 ohm, 1/2 watt, 570.
470K ohm, 1/2 watt, 570.
lOOK ohm, 1/2 watt, 570.
470K ohm, 1/2 watt, 570.
lOOK ohm, 1/2 watt, 570.
470K ohm, 1/2 watt, 5%.
2200 ohm, 1/2 watt, 570.
47K ohm, 1/2 watt, 5‘10.
470K ohm, 1/2 watt, 570.
680 ohm, 1/2 watt, 570.
47K ohm, 1/2 watt, 5%.
27K ohm, 1/2 watt, 5%.
4700 ohm, 1/2 watt, 570.
2. 2 m e g . , 1/2 watt, 10%.
47K ohm, 1/2 watt, 570.
1 m e g . , 1/Z watt, 10%.
12K ohm, 1/2 watt, 10%.
470K ohm, 1/2 watt, 5%.
1 m e g . , 1/2 watt, lO’$o.
~
PARTS
LIST
MR-30/150-170
R 68
R 69
R70
R71
R72
R73 & R74
R75
R76
R77
R78
s1
s2 & s3
SWITCHES
Toggle, S P S T
3 a m p . , 125 V, DPDT
T3
TRANSFORMERS
P o w e r , p r i m a r y 117 volt, s e c o n d a r y 290 volt C. T. @ 250ma,
1 2 . 6 volt C. T. @ 5 a m p s . #P60328
Output, p r i m a r y 20K ohm, C. T . , s e c o n d a r y 150/600 ohms. #AT-141
TB1
TB2
TERMINAL
7-terminal
3 - t e rm in a 1
TPl
TP2
TP3
TP4
TP5
TEST
POINTS
Red, #119466-B
Orange, #119466-F
White, #119466-A
G r e e n , #119466-E
Blue, #119466-G
T2
0
RECEIVER
RESISTORS (continued]
270K ohm, 1/2 watt, 1070
470K ohm, 1/2 watt, 570
180K ohm, 1/2 watt, 1070
270K ohm, 1 watt, 1070 .
6800 ohm, 1/2 watt, 10%
1. 2 m e g . , 1/2 watt, 10%
150 ohm, 1/2 watt, 570
560 ohm, 1/2 watt, 570
150 ohm, 1/2 watt, 570
10 ohm, 2 watt, 10%
lOOK ohm, 1 watt, 570
1714 ohm, (One 12K, 1 W, 10% and one 2K, 5-8W. i n p a r a l l e l )
R66
R 67
a
MART1 E L E C T R O N I C
V1 t h r u V4
v5
V6
v7
V8 & V9
v10 & v11
v12
V13
V14
V15
V16
BOARDS
TUBES
Nuvistor, 6DS4
Nuvistor, 6DS4 ( U s e d on dual-frequency m o d e l s only)
6HS 6
12AT7
6HS6
6BH6
6AL5
6CG7
12AX7
12AT7
Voltage r e g u l a t o r , OB2
PARTS
LIST
MR-30/150-170
MART1 ELECTRONIC'
RECEIVER
CR Y S T A L S
x1
X P
x2
P i e z o type 2001. (Specify c h a n n e l f r e q u e n c y when o r d e r i n g )
P i e z o type 2001. ( U s e d on d u a l f r e q u e n c y m o d e l only)
I n t e r n a t i o n a l MXOl7G. (Specify channel f r e q u e n c y when o r d e r i n g )
TRANSFORMER CONNECTION DATA:
T3
Output t r a n s f o r m e r :
Primary
20K ohm - R e d and blue
C. T.
-White
S e c onda r y
600 ohm - Use G r e e n & Blue
White
T i e Black t o Red
-
-
White
150 ohm - U s e G r e e n & Black
T i e G r e e n to Red-White & Black to Blue-White
MART1 ELECTRONICS
Cleburne,
Texas
IIDUIJAIL, FREQUIJEN([;;’PP 0PE:HBBBTIION aff
M I R R - ~ ~1/1/ 5 m - n m REGEIIXTEI%L
-
Connect a single-pole, double-throw switch o r r e l a y to the r e c e i v e r t e r m i n a l s
2 , 4 and 5. Connect the c e n t e r l e g of the s w i t c h to t e r m i n a l n u m b e r 2 and
the o t h e r s e c t i o n s of the switch t o t e r m i n a l s 4 a n d 5 .
T h i s s w i t c h c a n be
mounted up to 40 f e e t f r o m the r e c e i v e r if a two-conductor, s h i e l d e d cable i s
Switch function i s t o ground the cathode of the o s c i l l a t o r of the d e s i r e d
used.
See d i a g r a m below and s c h e m a t i c d i a g r a m .
frequency.
Connect telephone l i n e to t e r m i n a l s n u m b e r e d 1 and 3 .
Connect t e r m i n a l n u m b e r 2 to a good e a r t h ground.
Connect telephone l i n e a t Studio to R e m o t e Input T e r m i n a l s .
1 and 2.
Connect telephone l i n e to t e r m i n a l s n u m b e r e d Connect t e r m i n a l n u m b e r 2 t o a good e a r t h g r o u n d .
2 to terminal number 6.
Connect a j u m p e r f r o m t e r m i n a l n u m b e r Remove the c e n t e r - t a p of T - 3 ( b l a c k & white w i r e s ) under c h a s s i s f r o m ground
a n d s o l d e r to t e r m i n a l n u m b e r 7 of r e c e i v e r t e r m i n a l s t r i p under c h a s s i s
Connect the telephone line to R e p e a t e r Coil a t Studio.
T h e output of the
r e p e a t e r coil should be connected to the Audio Input of the Console.
WHEN USING THE MR-30/150-170 RECEIVER I N REMOTE OPERATION,
20 DB P A D SHOULD BE IN THE “OUT“ POSITION.
REC.EIVEP L0C.P.T ION
STUDIO
THE
MARTI ELECTRONICS
Cleburne, Texas
THPJIGAIL, METElR lREBBDIIINGS
~
Series
of
Receivers:
Tube No. & Type
P i n N o . & Reading
Special Notes
V-1 6DS4
2
4
8
10
12
4 8 Volts
0 Volts
0 Volts
6 . 3 Volts A C
0 Volts
M e a s u r e d at terminal 1 of L- 1.
V-2 6DS4
2
4
8
10
12
4 8 Volts
0 Volts
0 Volts
6. 3 Volts A C
0 Volts
M e a s u r e d at terminal 3 of L-4.
V-3 6DS4
2
4
8
10
12
52 Volts
- 1 . 4 Volts
0 Volts
0 Volts
6 . 3 Volts AC
M e a s u r e d at t e r m i n a l 2 of L-8.
V a r i e s with c r y s t a l a c t i v i t y .
2
84 Volts
- 2 . 3 Volts
0 Volts
6 . 3 Volts AC
0 Volts.
M e a s u r e d at t e r m i n a l 2 of L-7.
V a r i e s with c r y s t a l a c t i v i t y .
v - 4 6DS4
4
8
10
12
V-5 6DS4
V-6 6HS6
Same as V - 4 when u s e d i n dual f r e q u e n c y m o d e l s .
1
2
3
4
5
6
7
V - 7 12AT7
~
MR-30
1
2
3
4
5
6
7
8
9
0 Volts
0 Volts
0 Volts
6 . 3 Volts AC
100 Volts
7 5 Volts
. 6 6 Volts
92 Volts
4 . 2 Volts
5. 8 Volts
0 Volts
1 2 . 6 V o l t s AC
72 Volts
0 Volts
1 . 5 Volts
6. 3 Volts AC
Page #2
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TYPlICAL IMIE'ITER BBEBBDIINGS
Tube No. &, Type
V-8 6HS6
P i n No.
1
I .
& Reading
Series
of R e c e i v e r s :
Special N o t e s
-
2. 0 Volts N o r m a l l y 0 V o l t s b u t w i t h a
s t r o n g s i g n a l - 2 . 0 Volts.
0 Volts
0 Volts
6 . 3 Volts AC
175 Volts
M e a s u r e d a t terminal 1 of L
70 to 86 Volts
Varies with signal.
. 4 2 t o . 50 Volts
V a r i e s with s i g n a l .
0 to
0 to - 6 . 5 Volts
V a r i e s with s i g n a l .
0 Volts
0 Volts
6 . 3 Volts A C
175 V o l t s
70 t o 100 Volts
V a r i e s with s i g n a l .
. 36 to . 50 Volts V a r i e s with s i g n a l .
V-9 6HS6
. 80
t o 1 5 Volts
0 Volts
0 Volts
6 . 3 V o l t s AC
100 V o l t s
75 Volts
0 Volts
V-10 6BH6
V a r i e s with s i g n a l .
-
. 4 5 Volts
0 Volts
0 Volts
6 . 3 Volts AC
110 V o l t s
92 Volts
0 Volts
V-11 6BH6
V-12 6 A L 5
MR-30
1
2
0 Volts
-9 t o - 17 Volts
0 Volts w h e n o n exact frequer.
Could v a r y t o r - 10 Volts.
V a r i e s w i t h a d j u s t m e n t of
P r i m a r y of L - 1 4 .
0 Volts
6 . 3 Volts AC
0 Volts
0 Volts
Same as P i n N u m b e r 2 .
. ? -
a
a
-
i
-t-
't
0
- - + -.
0
ru
r(
F:
z"
0
iz
U
C
z"
n
0
I
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0
4
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e,
.r(
d
&I
6(
Cd
'2:
i?
X
A
0-
-u
N
Page #3.
THPIIGBBL METER BEAllDJINGS
Tube N o . & Type
V-13 6CG7
MR-30
P i n No. & Reading
Series
of
Receivers:
S p e c i a l Notes
56 Volts
0 Volts
2 . 2 Volts
6 . 3 Volts AC
0 Volts
165 Volts
0 "Volts
4 . 7 Volts
0 Volts
V-14 12AX7
62 t o 170 Volts
0 t o - 4 . 0 Volts
0 t o 17 Volts
0 Volts
1 2 . 6 Volts AC
116 Volts
0 Volts
1 . 7 Volts
6 . 3 Volts AC
V a r i e s with s q u e l c h a n d s i g n a l .
V a r i e s with s q u e l c h a n d s i g n a l .
V a r i e s with squelch a d j u s t m e n t .
V - 1 5 12AT7
126 to 170 Volts
0 t o - 9. 0 Volts
0 to . a Volts
0 Volts
1 2 . 6 Volts AC
0 t o - 10 Volts
0 t o - 10 Volts
1 . 7 Volts
6. 3 V o l t s AC
V a r i e s with s q u e l c h a d j u s t m e n t .
V a r i e s with s q u e l c h and signal.
V a r i e s with s q u e l c h and s i g n a l .
V a r i e s with squelch a n d s i g n a l .
V a r i e s with squelch a n d s i g n a l .
All r e a d i n g s with a Vacuum Tube V o l t m e t e r e x c e p t AC Voltage R e a d i n g s .
AC Voltage Readings with AC Volt M e t e r .
\
All DC r e a d i n g s a r e considered n o r m a l i f within p l u s o r m i n u s 20% of
typical r e a d i n g s .
1
,-
'
're..
I
1
.
I
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4
.
.
I
. ..
1
. .-
.
_--
L- II
Pin I
V8
To
Of
Delete F L - B P
Add L-11
Same as L-12 R a d i o I n d u s t r i e s EO-15694-R1
Add C-105 Discap, 5. 0 mmfd, 57'0, 500 Volts.
Add C-106 Discap, 47 mmfd, 57'0, 500 V o l t s .
R e p l a c e F L - B P with L-11, C-105 & C-106.
Marti Electronics
Modification on
MR-30/150-170 DWG 102
t o b e c o m e MR-30/150-170
P a g e No. 2
X
MARTI 0-1A SOLID S T A T E OVEN
THIS EQUIPMENT IS S U P P L I E D WITH T H E MARTI 0 - 1 A SOLID
STATE PROPORTIONAL T E M P E R A T U R E CONTROLLED CRYSTAL
OVEN AND SPECIAL HIGH ACCURACY CRYSTAL.
THIS OVEN-
CRY STA L COMBINATION PROVIDES F R EQUENC Y STABILITY
O F .0005% F R O M -3OOC to t 60°C.
DO NOT USE THIS CRYSTAL
IN CONVENTIONAL HIGH T E M P E R A T U R E OVENS OR USE
VENTIONAL CRYSTALS IN THIS SOLID STA.TE OVEN.
CON-
T H E 0-1A
OVEN DOES NOT PRODUCE T E M P E R A T U R E S HIGH ENOUGH T O
D E T E C T B Y TOUCHING T H E ALUMINUM HOUSING.
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