I agree with Newbee . . . you need to determine if the problem is in the amp, or the tubes. I have had brand new tubes that wouldn't bias properly. Once you rule out tubes as the problem, you will want to have the amp looked at. It's important to have proper bias.
Can't get proper tube bias per manual
Hi All,
Regarding a MCIntosh MA-230,
How important is it to set the bias according to the manual?
Mac states set idle voltage to .7 v. Best I can get is .3 to .4
Considering it's age the amp sounds very exceptional, Does the amp have a problem that needs to be urgently addressed or am I just being overly cautious?
Looking at the schematics, I could drop the values on a set of 4 resistors to change the levels, but need to check with the experienced on this.
thanks..
Regarding a MCIntosh MA-230,
How important is it to set the bias according to the manual?
Mac states set idle voltage to .7 v. Best I can get is .3 to .4
Considering it's age the amp sounds very exceptional, Does the amp have a problem that needs to be urgently addressed or am I just being overly cautious?
Looking at the schematics, I could drop the values on a set of 4 resistors to change the levels, but need to check with the experienced on this.
thanks..