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Radio devices - list of circuit diagrams

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Sensitive DX TRF Receiver circuit diagram
A perfect broadcast direct TRF receiver designed for the detection of AM signals in the 150kHz to 3MHz

author: Husnu Kokturk
visits: 308
Antenna Tuning Unit circuit diagram
A simple passive circuit to match an antenna to a radio receiver

author: Andy Collinson
visits: 280
2 Transistor Transmitter circuit diagram
A compact 2 transistor transmitter for use at VHF frequencies

author: Rob
visits: 271
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: 267
4 Transistor Transmitter circuit diagram
This circuit provides an FM modulated signal with an output power of around 500mW

author: Paul K. Sherby
visits: 262
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: 236
FM Transmitter circuit diagram
A portable FM transmitter that can be used to replace a FM microphone

author: David Celestin
visits: 233
6 x 6 Loop Antenna circuit diagram
The antenna uses one, six foot square, six turn loop, and is aperiodic in nature, covering the frequency range 50KHz - 5000KHz.

author: Graham Maynard and Andy Collinson
visits: 232
FM Transmitter Circuit circuit diagram
Simple FM Transmitter Circuit

author: Kamran Ahmed
visits: 207
Surveillance Transmitter Detector circuit diagram
This project has few components, can be made on veroboard and powered from a 9 volt battery for portability

author: Andy Collinson
visits: 206
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