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Radio devices - list of circuit diagrams
A VHF band TV transmitter using negative sound modulation and PAL video modulation
author: David Kwaku Celestin - Ghana, West Africa visits: 862 
A perfect broadcast direct TRF receiver designed for the detection of AM signals in the 150kHz to 3MHz
author: Husnu Kokturk visits: 780 
A portable FM transmitter that can be used to replace a FM microphone
author: David Celestin visits: 737 
This circuit is designed to be used in conjunction with the standard 4 foot square loop used in MW for long distance reception
author: David Sayles visits: 731 
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: 689 
This is a nice performer and will tune from the 22 meter international broadcasting band down to the 11 meter band.
author: Ramón Vargas visits: 688 
A compact 2 transistor transmitter for use at VHF frequencies
author: Rob visits: 685 
A Short Wave Receiver based on the MK484 (formerly ZN414) that includes the tropical bands and 49 metre bands
author: Andy Collinson visits: 658 
This circuit provides an FM modulated signal with an output power of around 500mW
author: Paul K. Sherby visits: 657 |
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