• on Audio/Video/Photography
  • Published in issue 7/2008 on page 108
About the article

Detector with Amplification

A simple shortwave radio detector is neither very sensitive nor very selective. However, with a little extra amplification we can improve the reception performance significantly.
The additional circuit is designed to compensate for the losses in the resonant circuit. A transistor is used to amplify the RF signal and feed it back into the resonant circuit.
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