[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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