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Simple AGC for radio receiver

The automatic Gian control circuit also AGC with audio signal is simplest for compress to signal in the Radio receiver. It is ideal for short wave radio receiver used in areas with weak signals.
You should adjust the master volume control dress until the desired signal intensity. While tuning the receiver to the station light, then gradually tuned to the power station and adjust the AGC pot until the pressure in the hearing as needed.

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Categories: Electronic Control, RF-Radio Frequency Tags: AGC circuit, gian control circuit, Short Wave Radio

A SHORT WAVE REGENERATIVE RECEIVER

Sensitivity and selectivity are the major concerns of a short wave enthusiast when he looks up for a receiver. Commercial communications models with superhet circuitry surely satisfy his requirements, but these are expensive. He would rather go for a homebrewed radio, being a regenerative receiver an affordable choice.

I’m also a short wave listener and for some time I used my family’s MW and SW tube radio, Philips brand. Then I switched to a Sony ICF-7600 with ceramic filters in the IF stages. High selectivity was attained with this radio receiver.
I then discovered how much fun it was to build radios in my spare time, having tested a variety of designs available in books and on the web. Finally, I managed to make my own designs. One of them is shown in Fig. 1. It is a nice performer and will tune from the 22 meter international broadcasting band down to the 11 meter band.

It is best that the 100 pF variable capacitor be a vernier type. Tuning will be easier this way.
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Read More Source:http://www.zen22142.zen.co.uk/Circuits/rf/swr.htm