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Function generators, 5 MHz with integral feedback voltage
Function generators, 5 MHz with integral feedback voltage

... low-cost signal sources designed to meet everyday practical requirements. The outstanding feature of these instruments is the frequency counter with LED for measuring both internal and external signal frequencies. The high output voltage of max. Vpp = 30 V will satisfy the requirements of most gener ...
IF Alignment - Canadian Vintage Radio Society
IF Alignment - Canadian Vintage Radio Society

... • Ok, so this circuit is solid-state (argh!), so just imagine these are triodes… ...
Local Oscillator / Harmonic Mixer Frequency Measurement System
Local Oscillator / Harmonic Mixer Frequency Measurement System

... frequency counter. Realize that this system cannot distinguish whether the microwaves input are below or above 140 Ghz. This can be determined, however, by increasing or decreasing the frequency of the microwaves (using the mechanical bellows on the EIO) and observing the effect this has on the meas ...
Radio astronomy receiver overview
Radio astronomy receiver overview

... In Equation 7 we have converted to the units, dBm, which is dB above or below one milliWatt. This is a very common unit in receiver design, and it is convenient in that ampli er gains in dB can be added to input signal levels to get output levels. The conversion to dBm is 10 log(PA ) + 30, where 30 ...
10m 10 100G 1u 1M 10f 1p 100 10M
10m 10 100G 1u 1M 10f 1p 100 10M

... 3b) You invent a new transistor, and find that the output current is given by  I​xy​ = K V​zy​3​ V​xy​1/2​     ;     ​I​z​ = 0  What are the formulas for the transconductance and the output resistance?  What is the intrinsic gain when the device is biased at V​zy​=V​xy​=1V? (give a numerical  answer ...
Power function generator with integral feedback voltage protection
Power function generator with integral feedback voltage protection

... will not destroy its output stage. Furthermore, all front-panel inputs and outputs are no-load and short-circuit proof. The frequency settings are made using a decade switch, the frequency dial and the frequency offset potentiometer. The latter allows frequency settings with a reproducibility of < 0 ...
Lab-in-a-Box
Lab-in-a-Box

... 1. Derive the transfer function for the circuit in Figure 1(b) of the text. 2. Calculate the values of R1 and C1 so that the gyrator matches the RL filter in Figure 1(a) of the text. Use only components in the parts list given in Appendix A of the text. Modeling: 3. Simulate the RL circuit in Figure ...
WM-UR802 8 Channel UHF Wireless Microphone
WM-UR802 8 Channel UHF Wireless Microphone

... UHF wireless technology to avoid any cable wiring and of easy portability system Supports up to 1600 individual channels to be used simultaneously No interference between two tabletop microphone Infrared frequency synchronization UHF band with PLL digital frequency synthesis High sensitivity to meet ...
Repeater cable version 2
Repeater cable version 2

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FTV-1000 - Fox Tango International
FTV-1000 - Fox Tango International

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WIR-TRAN - S.R. Smith
WIR-TRAN - S.R. Smith

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Download the Quiz
Download the Quiz

... C. Try the long path What should you do if another operator reports that D. Increase the antenna SWR your station’s 2 meter signals were strong just a moment ago, but now they are weak or distorted? A. Change the batteries in your radio to a different type B. Turn on the CTCSS tone C. Ask the other ...
Amateur Radio Technician Class Element 2 Course
Amateur Radio Technician Class Element 2 Course

... • No frequency will be assigned for the exclusive use of any station and neither has priority. This rule applies when two amateur stations want to use the same frequency. • If you hear a newly licensed operator that is having trouble with their station you should contact them and offer to help with ...
CHAPTE 2 LITERATURE REVIEW 2.1 Introduction I have performed
CHAPTE 2 LITERATURE REVIEW 2.1 Introduction I have performed

... Frequency Modulation (FM) is the method of varying a carrier wave's frequency proportionally to the frequency of another signal, in our case the human voice. This compares to the other most common transmission method, Amplitude Modulation (AM). AM broadcasts vary the amplitude of the carrier wave ac ...
Coupling Capacitors (Updated 5-15
Coupling Capacitors (Updated 5-15

... From Figure 1 again, we see we need to assure this degradation occurs within a half-cycle of frequency f, so we have RC * 0.1 = 1/(2*f) which can be solved: C = 5 / (f *R). Thus for a given frequency f (and R = 50) we can calculate the required minimum capacitance needed to assure at most a 10% degr ...
Exam-Prep Jepperdee: Technician Edition
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Short Wave receiver
Short Wave receiver

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Lecture 16
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... frequency. At 10x the corner frequency, the output is about 1/10 of the input.  An LC circuit reduces the signal in proportion to the square of the frequency. At 10x corner f, the output is about 1/100 of the input.  The corner frequency for an LC circuit is ...
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Ham Radio – General Exam – Study Notes
Ham Radio – General Exam – Study Notes

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Physics 517/617 HOMEWORK V Due Nov 24
Physics 517/617 HOMEWORK V Due Nov 24

... e) Remembering that the base-emitter junction of a transistor acts like a diode, use the results of part d) to describe how a high frequency AM signal gets demodulated (turned into high and audio frequencies) in the radio you will be building in lab. f) Again, considering the AM radio you are to bui ...
Physics 517/617 HOMEWORK V Due August 2
Physics 517/617 HOMEWORK V Due August 2

... e) Remembering that the base-emitter junction of a transistor acts like a diode, use the results of part d) to describe how a high frequency AM signal gets demodulated (turned into high and audio frequencies) in the radio you will be building in lab. f) Again, considering the AM radio you are to bui ...
Physics 4700 HOMEWORK V Due Nov 2
Physics 4700 HOMEWORK V Due Nov 2

... e) Remembering that the base-emitter junction of a transistor acts like a diode, use the results of part d) to describe how a high frequency AM signal gets demodulated (turned into high and audio frequencies) in the radio you will be building in lab. f) Again, considering the AM radio you are to bui ...
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Amateur radio repeater



An amateur radio repeater is an electronic device that receives a weak or low-level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. Many repeaters are located on hilltops or on tall buildings as the higher location increases their coverage area, sometimes referred to as the radio horizon, or ""footprint."" Amateur radio repeaters are similar in concept to those used by public safety entities (police, fire department, etc.), businesses, government, military, and more. Amateur radio repeaters may even use commercially packaged repeater systems that have been adjusted to operate within amateur radio frequency bands, but more often amateur repeaters are assembled from receivers, transmitters, controllers, power supplies, antennas, and other components, from various sources.
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