Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
I have an older version of the MA-1 Amplifier with 5 6sn7 driver tubes and 12 6As7 output tubes (serial # 065). I can not find any information on Bias and DC offset adjustments. Please help. Ken
Here are some pictures.
-As a result the Bias is automatic. You only adjust the DC Offset.
Depress the Test button on the rear panel, adjust the DC Offset control for a zero ('0') reading on the meter. Do not do this when signal is applied as the meter can be easily damaged.
Check it again after 1 hour of operation.
That's it- pretty easy.
From what you can see, could you tell me the history of this amplifier? Has it been updated? Thanks. Ken
Its a MkIII; beyond that I can't speculate without seeing what's inside.
Thank you for the instructions on setting dc offset. The amps are working well. I have another picture inside the amp for you to look at. Hopefully you can give me more info on the amps. ken
Ralph should be here shortlty with the information you need...
They're way different than my MA-1's.
Post a Followup:
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: