I think I have a microphonic pre amp tube in my Laney AOR 50w combo.

I don't have enough to re tube the whole thing so only want one.

Can I just stick a new one in without re-biasing the amp?

Can the tubes be different from the ones I already have or do they have to be the same make etc?

I'm in the UK so could someone link me up with what I need.

I'm a noob with tubes!

Thanks...Something for like a tenner or under as I'm skint until payday!

Last edited by moominman2 at May 4, 2011,
For preamp tubes? Any 12A__ will work I believe. And no, you don't have to bias pre amp tubes.
Gibson SG Special Faded
Marshall JCM2000 DSL 401