[Boatanchors] Speaking of re-gens

Richard Knoppow 1oldlens1 at ix.netcom.com
Tue Jan 31 19:18:47 EST 2012


----- Original Message ----- 
From: "Phil" <ko6bb1 at gmail.com>
To: "Boatanchor List" <boatanchors at mailman.qth.net>
Sent: Tuesday, January 31, 2012 2:54 PM
Subject: [Boatanchors] Speaking of re-gens


> Been following the SW3 threads.
>
> Way back when, perhaps around 1960 (I was in my teens), 
> give or take, I
> built an "FM broadcast tuner" that used a super-regen 
> detector.  I seem
> to recall that the circuit came from a magazine of the day 
> (Popular
> Electronics?) and was basically a 1 tube circuit.  I think 
> it may have
> used a 6C4 tube, but I don't remember for sure.  Actually, 
> 'my'  version
> used the 1 tube super-regen circuit from the article, 
> followed by a two
> stage audio amplifier to drive a speaker directly.   While 
> I had built
> MANY HF and BCB receivers prior to this, this was my first 
> venture into
> the world of VHF, and it performed surprisingly well.  We 
> lived in Grass
> Valley then, and I had no problem listening to the FM 
> Broadcast stations
> out of Sacramento. . .
>
> Anyone recall the circuit and/or the magazine article this 
> may have come
> from?

     There must have been lots of them. I found a Super 
regenerative VHF receiver in the 1948 edition of the ARRL 
handbook. Fairly complex version but one can make them with 
a single tube. The Hewlett-Packard 417-A Bridge Detector is 
a super regenerative receiver for VHF frequencies. I suspect 
a Google search would find a lot of hits including 
Armstrong's patent.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com 



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