There are many interesting and reasonably accurate tube emulation circuits but none that I have seen seem to address the variation of semiconductor parameters with temperature. Real tubes work so far from ambient temperature that they are largely unaffected by changes within the normal human range of endurance.

I would guess at 0C to 30C as a useful working range (32F to 86F) for an amp that is to sound the same in world wide ambient temperatures. Is this worrying unnecessarily?

Hello all,

I have been dabbling with emulating a triode stage but using BJTs rather than FETs, which I find to be too variable in their parameters.

I have put a report on my website at http://www.aquinaudio.co.uk/valve_em.html and I am posting here, where I hope it may be of use, rather than just being lost in the background noise of the www.

Arthur