Message-ID: <3C357837.66351614@virgin.net>
Date: Fri, 04 Jan 2002 09:39:03 +0000
From: "Stewart Bryant" <stewart.bryant@virgin.net>
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To: rsgb_lf_group@blacksheep.org
Cc: "API \(E-mail 2\)" <jfell@crydom.com>, 
 "JVL \(E-mail\)" <'mh__emwalters@26fernhurst.freeserve.co.uk'>,
 "WDG \(E-mail\)" <csuckling@nhlab.demon.co.uk>, 
 "YGF \(E-mail\)" <julian.gannaway@roke.co.uk>
Subject: Re: LF: Request to any (relative) OTs out there 	!
References: <7D653C9C42F5D411A27C00508BF8803D55C685@pdw-mail-r1.dstl.gov.uk>
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Andy

Presumably you have seen this:

http://www.hanssummers.com/radio/huffpuff/contents.htm

Stewart G3YSX

Talbot Andrew wrote:

> A request for anyone out there who was receiving RadCom or any other
> magazine,  before I joined in 1975......
>
> I'm looking for the reference to the Huff-Puff stabilisation scheme, and in
> particular the improved Mark 2 modified version that, seem to recall,
> employed a counter rather than a simple flip-flop.  It almost certainly
> appeared in Radio Communication in the 1970s, and from what I remember of
> talk in my local radio club in those days, was probably around 1973 - 74.
>
> Have a feeling I'm in the process of 're-inventing' it for a high stability
> GPS locked source for low data rate signalling, and don't want to claim the
> credit for an idea that appeared over a quarter of a centuary ago!
>
> With a PIC instead of all the control logic, it should certainly be a lot
> easier and simpler than the original concept!
>
> Andy G4JNT
>
> --
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