"Alan Varty" wrote:
> Hello Eero.
>
> I cannot remember which issues contained the schematics for the Matrix-H
> only variomatrix decoder, sorry.
This looks like the following Wireless World
two-page article:
Surround sound decoders - 5
Variomatrix adaptor for System 45J and
Matrix H
Phase shift circuit allows Variomatrix to
decode Matrix H and System 45J
by Michael A. Gerzon, M.A., Mathematical
Institute, Oxford
Unfortunately the date on my photocopy is
messed up. It is definitely May, and probably
1977
> Later, there were some simple mods to change from H to HJ.
I remember this article, but cannot find it in my
heap of stuff.
Regards,
Martin
--
Martin J Leese
E-mail: martin.leese stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
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