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Old 19th Jan 2005, 6:51 am   #4
dave_n_t
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Join Date: Sep 2003
Location: Cheltenham, Gloucestershire, UK.
Posts: 220
Default Re: Super Regen receiver circa 1960's

Richard,


Are you sure it was a super-regen? I've only seen a handful of these for MW reception (OC44 wouldn't really get you into the realms of SW). I can remember one by Sir Douglas Hall in the Radio Constructor (which used far too many now unobtainable Repanco TT53 microphone +other transformers!); the other was either in the PW or RC (again) using a surface barrier transistor - I think written by someone living in the W. Indies.

One of the issues about MW super-regens is getting a low enough quench frequency to achieve reasonable super-regen gain (which is related to the RF:quench freq. ratio), whilst not being left with an audible whistle at quench frequency. Indeed, the Sir D.H. circuit was followed up with a suggested audio freq filter to put in the audio output stage. (I think the q. freq was about 10kc/s).

HTH

Dave
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