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Radio devices - list of circuit diagrams

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Automatic Retransmitting Makeshift Repeater circuit diagram
A self powered (audio derived) repeater circuit for receiving a signal and re-transmitting it via the other radio

author: Miroslav Adzic
visits: 12041
AM Transmitter circuit diagram
This circuit is deliberately limited in power output but will provide amplitude modulation (AM) of voice over the medium wave band.

visits: 9677
2SC1946A 30 Watt VHF Amplifier circuit diagram
The circuit is designed to cover 88-108MHz FM Broadcast Band. However, the circuit is very stable at my place and provides a clean-output through seven (7) element Butter-worth low-pass filter

author: David Celestin, Ghana, West Africa
visits: 7688
AM Receiver circuit diagram
A compact three transistor, regenerative receiver with fixed feedback

visits: 4025
Antenna Tuning Unit circuit diagram
A simple passive circuit to match an antenna to a radio receiver

author: Andy Collinson
visits: 3354
4 Band Double Tuned Preselector circuit diagram
The unit covers MW and Sw to 30MHz

author: David Sayles
visits: 2877
Medium Wave Active Antenna circuit diagram
Circuit designed to amplify the input from a telescopic whip antenna

author: David Sayles
visits: 2799
FM Receiver circuit diagram
An FM regenereative receiver using a single FET and one audio amplifier IC.

author: Patrick Cambre
visits: 2686
Low-Frequency Crystal Controlled Oscillator circuit diagram
A circuit that has been found to work at full satisfaction in the frequency range from 10 kHz to 500 kHz

author: Ramon Vargas - Lima, Peru
visits: 2459
TV Transmitter circuit diagram
A VHF band TV transmitter using negative sound modulation and PAL video modulation

author: David Kwaku Celestin - Ghana, West Africa
visits: 2357
page: 1 2 3 4