[sdiy] opto compressor project

[Magnus Danielson]

From: "JH." <jhaible at debitel.net>
Subject: [sdiy] opto compressor project
Date: Sat, 10 Jul 2004 22:56:26 +0200
Message-ID: <000501c466c0$5fd783d0$437fb9d9 at jhsilent>

> I've made some pictures of my opto compressor project.
> Schematics, too.
> 
> http://www.oldcrows.net/~jhaible/opto_compressor/jh_opto_comp.html
> 
> Don't laugh at the tube heater circuit - it was a cheap workaround to use
> the 26V supply that was intended for a transistor based output amplifier at
> first. So at least I didn't have to buy another power transformer with 6 or
> 12 Volts ...

Just the other day I showed a friend of mine (experienced professional power
supply designer) the VCS-3/Synthi-A Mk I PSU schematic and asked him find the
flaws, he spotted them almost all, but he wasn't paying attention to the
shunting action of the regulations. The mixed-mode loading in there helps to
confuse things. Your heater design is so much like the Mk I PSU design that
it is scary. You should know better... ;O)

But, how is the LDRs modulated? I can't see that from the schematics...

Cheers,
Magnus - with a blind spot too many?