Shift of center image

[borism]

Hi,

I have been enjoying my Stereomour but recently have noticed the center image shifting towards one side and the loudspeaker away from the center image seemingly not playing as loudly as the other. There is no noise that I have noticed. I have been using matched JJ 2A3-40 tubes from Eurotubes. So, I switched the two 2A3s and the center image shifted the other way.
Does that mean that one of the tubes, presumably the one playing softer, has gone bad? I've had them for less than 6 months and Eurotubes has a 6 month warranty, so I'll probably contact them. Just wanted to see what people here think.
Finally, could this in any way be an issue with the amplifier itself?

Thanks,
Boris

[M42]

Hi Boris,

Do you still have the stock Sovtek's that came with the amp? You could swap them with the JJ's to see if the same problem presents itself. I think this would help isolate the issue to either the tubes or the amp.

Regards,

Jeff

[borism]

Hi Jeff,

Good idea! I still have the Sovteks.

Thanks,
Boris

[borism]

Just an update. The Sovteks work great and the image is solidly in the center between the speakers. So, the amplifier is clearly working fine and it's one of the JJ 2A3 tubes causing the shift.
I called Eurotubes and they said to just ship the JJ pair back and they will send a replacement since they are still under warranty.
Great service!

[M42]

An excellent result!

Jeff

[galyons]

...
I called Eurotubes and they said to just ship the JJ pair back and they will send a replacement since they are still under warranty.
Great service!

THE biggest reason to buy your JJ power tubes from Eurotubes!

Cheers,
Geary