Is my AD140TC a fixed bias amp?

Testa Duro · Post by **Testa Duro** » Fri Jul 05, 2002 4:42 pm

<font color=blue></font id=blue>Hello all, I own a 140tc and I am wondering if it is fixed bias? I installed a matched quad of Svetlana tubes OMEC sent me, the amp sounds and works fine, but I am concerned about bias current. Is there a provision for a bias trimmer pot on this thing or ist it fixed? should I worry about even checking it?Since this is such a new design amp I fell I should ask the source...Any help out there fellas?

Techno sucks. Electronica sucks. Synthesizers are tools of the DEVIL.

geertjacobs · Post by **geertjacobs** » Thu Jul 11, 2002 11:00 pm

Fixed bias doesn't mean that there can't be a pot.
http://www.aikenamps.com/AmpTerms.html

Your amp will most likely have a bias pot(as all push-pull amps except for Mesa Boogies). The pcb picture on www.proguitar.de isn't very clear, but I suspect to see at least one bias pot in there.

G.

http://www.geocities.com/geertjacobs/orange_page.htm

Testa Duro · Post by **Testa Duro** » Fri Jul 12, 2002 12:52 am

Thanks Geer, I really enjoy your website by the way! theres alot of great and usefull info.

Techno sucks. Electronica sucks. Synthesizers are tools of the DEVIL.

Is my AD140TC a fixed bias amp?

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