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Radio devices - list of circuit diagrams
A perfect broadcast direct TRF receiver designed for the detection of AM signals in the 150kHz to 3MHz
author: Husnu Kokturk visits: 308 
A simple passive circuit to match an antenna to a radio receiver
author: Andy Collinson visits: 280 
A compact 2 transistor transmitter for use at VHF frequencies
author: Rob visits: 271 
A VHF band TV transmitter using negative sound modulation and PAL video modulation
author: David Kwaku Celestin - Ghana, West Africa visits: 267 
This circuit provides an FM modulated signal with an output power of around 500mW
author: Paul K. Sherby visits: 262 
A self powered (audio derived) repeater circuit for receiving a signal and re-transmitting it via the other radio
author: Miroslav Adzic visits: 236 
A portable FM transmitter that can be used to replace a FM microphone
author: David Celestin visits: 233 
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 
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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