[sdiy] low rbe tranies?

[Magnus Danielson]

From: Paul Perry <pfperry at melbpc.org.au>
Subject: Re: [sdiy] low rbe tranies?
Date: Mon, 15 Sep 2003 09:16:23 +1000

> The 'classic' exponetial circuits are based on the assumption that 
> matched low rbe pairs are available, an assumtion that while still
> true, is not as true as it was 40 years ago.
> Is it possible (at the price of some added trimmers) to make an
> 'unmatched' version?

Yeap! If you look around on old schematics, like the Buchla 200 series and
many others, you will find that there is indeed such methods. A simple one
consists of only a single diode and a resistor added to the brew...

Also, fellow friends here (Ian and René as I recall it) have been
investigating this and I think you will find stuff in the archives as well
as their webpages. There are perfections to the simple techniques available
and those still come for a low price.

> I can't see why it would be impossible.. impossible for ME, yes!
> but perhaps not impossible for some people here ;D

I think "some people" has allready done work on it. Don't you worry!

Cheers,
Magnus - been the wall to bounce the ball against for a tiny moment of time