Series 1 100EL34 Questions

THE NEW #1. Series One Amplifiers.
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booger007
Posts: 1
Joined: Sun Feb 21, 2016 1:30 pm

Sun Feb 21, 2016 1:57 pm

Thinking about pulling the trigger on one of these. Would like a definitive answer as to whether it has bias trimpots or is fixed bias. I prefer to run my tubes a little warm.

Had issues with my beloved Marshall 6100 at practice last night so I need either a backup head that will cover my 6100 as my DSL50 will not. Maybe the Blackstar becomes my primary head

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thephantum
Posts: 1160
Joined: Wed Jan 29, 2014 7:42 pm
Location: Virginia, United States

Mon Feb 22, 2016 1:12 am

booger007 wrote:Would like a definitive answer as to whether it has bias trimpots or is fixed bias.
Yes. It is a fixed bias amp and thus it has trimpots. By definition, fixed bias means it's adjustable, in other words you "fix" the bias into place. So called self-biasing amps use cathode resistors to regulate the flow of bias current.

aqa
Posts: 6
Joined: Wed Aug 12, 2015 3:53 am
Location: Costa Rica

Fri Mar 04, 2016 4:28 am

Yes , it has trimpots, I have and S 50 and it should read 50mV, Iguess for a S100 would be 100mv, I read somewhere too in this forum

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