Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  
previous: Carlos deCastro I just had my amp rebiased with Sov... -- 10/22/1998 6:21 PM View Thread

Re: Biasing for Marshall 9005 power amp

10/23/1998 1:51 AM
Andy Ruhl
Re: Biasing for Marshall 9005 power amp
Don't try to bias it if you don't know what's going on. If I remember right, those things have a bias pot for each side. I don't remember, but I think there are 2 pots per side, one may be a balance but don't quote me on that. I only worked on one and I didn't take notes.  
I put Svetlana 6L6GC's in the one that I worked on, and it was great. It had Crap-Tek 5881's in it before. The guy was using it for big clean tones, so the 6L6GC's may have been a better choice for him than the EL34's.  
Don't try to bias it yourself unless you know what to do and what to look for. There are plenty of books available on the topic.