volume differences in my 2:90

[legionsofchaos]

Another 2:90 question..., sorry if it has been asked before. I just bought a used 2:90 a while ago, and noticed that channel B is almost twice as loud as channel A. Is this normal or could there be a problem somewhere ? Both channels seem to work fine, right now I mainly use it in mono configuration so it isn't a huge deal. When I do want to use it in stereo I find it hard to adjust the volumes accordingly. Has anyone else had this problem, or is it how the power amp runs ? By the way it is the older blue light model.

 

[ando]

No, that's not normal. First port of all would be to replace the tubes, but for the purpose of diagnosis, switch the channel A and channel B tubes around. If the problem stays the same, it's in the amp circuitry. If it shifts to the other channel, it's just the tubes.

 

[zodiac272]

Could be tubes, or a bad resistor in the circuit. I had my A channel go out, and it was one resistor. I also put new tubes in it.

scott