Bias pots /trimmers

[aron]

Hi everyone,I just bought a few things from Hoffman and I have a question about bias pots,I have read that you should use cermet pots cause carbon may burn with DC.Are the fender bias pots cermet? I bought both trims and the larger pots,I'm recapping a traynor bassmaster YBA1A and also I'd like to make the bias adjustable,I have to pick up the package today so will likely start working on the amp tomorrow.
Thanks
Aharon

[sluckey]

Either of the bias pots that Hoffman sells will be fine. A typical bias circuit puts only a small current through the bias pot. I prefer a small chassis mount locking pot but if I ever have to buy a bias pot, I'll use one from Hoffman.

[aron]

Thanks sluckey.
Aharon

[PRR]

> carbon may burn with DC.

Anything "can" be burned.

I wasn't aware that cermet was better. Except that it can be a little tougher in very small sizes. If you are varying B+ in a helicopter radio, that might matter.

Guitar amp bias is too small to hurt any pot big enough to see.

[aron]

I read too many Weber books.
Aharon