[sdiy] Moog ladder matching

[harrybissell]

IMHO the thermal coupling might not be that much of an issue... as the
self heating should be small (maybe 1mA max current)... and it will be matched.

IF they are not in a isothermal environment. Put one next to a power resistor
and
all bets are off...

H^) harry

Magnus Danielson wrote:

> From: Antti Huovilainen <ajhuovil at cc.hut.fi>
> Subject: [sdiy] Moog ladder matching
> Date: Sun, 13 Mar 2005 23:04:47 +0200 (EET)
> Message-ID: <Pine.OSF.4.61.0503132303310.191871 at kosh.hut.fi>
>
> > Hi
>
> Antti,
>
> > How well do the transistors in a Moog ladder have to be matched (each
> > pair, I know matching between pairs is not that important)?
> >
> > Do they have to be thermally coupled too or is it enough if I simply place
> > them close?
>
> The better matched and thermally coupled they are, the better supression of
> common mode to diffrential mode you get, which is the goal.
>
> Cheers,
> Magnus