Radio devices - list of circuit diagrams

This circuit is deliberately limited in power output but will provide amplitude modulation (AM) of voice over the medium wave band.

author:
visits: 5932

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: 4013

A compact three transistor, regenerative receiver with fixed feedback

author:
visits: 2129

An FM regenereative receiver using a single FET and one audio amplifier IC.

author: Patrick Cambre
visits: 1188

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

author: Miroslav Adzic
visits: 1119

A simple passive circuit to match an antenna to a radio receiver

author: Andy Collinson
visits: 1112

The unit covers MW and Sw to 30MHz

author: David Sayles
visits: 1076

Circuit designed to amplify the input from a telescopic whip antenna

author: David Sayles
visits: 1056

Although only low power this circuit may be tuned to operate over the range 87-108MHz with a range of 20 or 30 metres.

author:
visits: 936

An AM portable radio receiver made from the ZN414 IC

author: Andy Collinson
visits: 878