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hf gendet – Circuit Schematic
hf gendet
I was lucky to use an HP33290A wave generator for my radio building projects, a fantastic instrument for generating all kind of signals up to 15MHz. Since I cou...
gcr – Circuit Schematic
gcr
An 5 pole elliptic low pass filter (impedance: 50Ohm, -6dB cut off frequency 33MHz) connects the antenna signal to the diode ring mixer, a traditional SBL-1, wh...
preamp HF VHF UHF SHF wideband MAR6 – Circuit Schematic
preamp HF VHF UHF SHF wideband MAR6
The MAR6 (MSA-0686, 0685, 0885) is a high performance silicon bipolar Monolithic Microwave Integrated Circuit (MMIC) housed in a low cost, surface mount plastic...
6 meter vertical antenna – Circuit Schematic
6 meter vertical antenna
easy to build home made 50 Mhz (6-metres band) vertical half wave antenna! Omnidirectional, high gain, low SWR!.....
OIRT Tuner – Circuit Schematic
OIRT Tuner
For the long-distance listener (dx-er) it is a treat to listen on a band 8MHz wide which normally is completely empty, but which is capable of providing periods...
NOVA1 Radio Data Downlink – Circuit Schematic
NOVA1 Radio Data Downlink
The whole system was built in a package that was about 70mm x 96mm x 30mm which contained the TNC, transmitter, interface circuitry and a lithium battery suffic...
1962 circuit diagram tech data philips l3go3t radio – Circuit Schematic
1962 circuit diagram tech data philips l3go3t radio
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two stage fm transmitter bug more tank circuits – Circuit Schematic
two stage fm transmitter bug more tank circuits
These two tank circuits seem to expand that operating spectrum. Maybe The information sheet that came with the bug states that When both circuit stages are osci...
phase lock loop frequency synthesizer – Circuit Schematic
phase lock loop frequency synthesizer
Major role in the PLL phase detector is held by the duty comparing the input phase of the VCO signal with a reference signal and the output is a different phase...
ZN414 portable am receiver – Circuit Schematic
ZN414 portable am receiver
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Quality fm transmitter circuit – Circuit Schematic
Quality fm transmitter circuit
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uhf tv booster preamplifier with – Circuit Schematic
uhf tv booster preamplifier with
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how to assemble radio transmitter – Circuit Schematic
how to assemble radio transmitter
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simple rf id reader module design – Circuit Schematic
simple rf id reader module design
Used a coil of about 1mH for both sides. Since my chosen frequency was 125 KHz, my capacitor should be 1. 62nF according to the following equation; I picked 1n5...
tv transmitter circuit 17 – Circuit Schematic
tv transmitter circuit 17
A very simple and high quality TV transmitter circuit based on IC MC374 is shown in this article. MC1374 is an integrated TV modulator circuit that can be used ...
gigahertz signal detector circuit – Circuit Schematic
gigahertz signal detector circuit
This circuit is useful to detect microwave (gigahertz signal) sources like microwave oven, satellite communication devices, Mobile phones etc. It gives audio vi...
drm down converter for 455khz if – Circuit Schematic
drm down converter for 455khz if
This project came about due to my interest in a new form of radio transmission called DRM, which stands for "Digital Radio Mondiale" (see This is a new form of ...
Modern Homodyne reciever circuit – Circuit Schematic
Modern Homodyne reciever circuit
This is the complete circuit of the modern homodyne receiver. This receiver can receive AM CW and SSB transmissions....
rc1 – Circuit Schematic
rc1
An Instruction and Reference Book on Radio and Television, Coyne Electrical and Television-Radio School, 1951...
Amazing all band receiver circuit – Circuit Schematic
Amazing all band receiver circuit
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