tube synthsizer

[Magnus Danielson]

From: "Paul Maddox" <Paul.Maddox at unilever.com>
Subject: RE: Re: tube synthsizer
Date: Tue, 26 Oct 1999 09:05:36 +0100 (British Summer Time)

> Cal,
> 
>   For you sake I hope Eric is not reading this..
> check out his webpage, his tubes synth is more stable
> than ANY transistor synth Ive ever seen, like the man says
> squirt air spray onto your matched pair until they are covered
> in frost and watch the vco drift like mad, probably even stop..

The matched pair is used for exponential modulation where as I think I recall
that Eric's tube VCO had linear modulation. I do not think the comparision is
done in a fair way to make the point valid. I do not question Eric's VCO for
stability, just that spraying the expo-diff pair of a transistor VCO doesn't
say anything in comparision really, it's that apple and pear stuff.

I have nothing against tubes or anything, I have just not got around to
actually design with them, but that comparision is a bit unfair and make
Eric's tube VCO look much better than a more correct comparision would have it.

But sure, they really behave diffrent to temperature, especially extreme
temperature. However, I rarely play in Sahara, Gobi or Antarctica but maybe
it is just that I doesn't get to play the large arenas that take millions of
penguins...

BTW. I did enjoy Eric's article on tubes in IEEE Spectrum, I just reread it.

Cheers,
Magnus