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In Reply to: RE: strange problem with Cayin TA-30 posted by jealouse on April 27, 2014 at 22:45:18
Those original 12AX7 maybe ok. Could have been a bad contact issue between the tubes and sockets.
Follow Ups:
ok. so it's broken after all.
i tried two sets of 12ax7s so i know it's not the tubes that's shot.
here's the symptom
- i replace 12ax7s and power it up, and let it run for a few minutes.
- when i play music with volume at MIN, i hear very faint, almost inperceptible music that comes out of RIGHT speaker. from LEFT speaker, nothing.
- i let the amplifier for an hour or so and the volume still at the MIN, i hear music that comes out of RIGHT speaker, as if the volume is at 8 o'clock position.
- i let the amplifier run for few hours and the volume still at MIN, i hear music that comes out of RIGHT speaker, as if the volume is at 10 o'clock position. from LEFT speaker, no music comes out as it should be...
to sum it up, it seems that the RIGHT chennel is the problem. what kind of failure can cause these symptoms? can anyone help?
thanks
ps. let me know if u have additional questions about these symptoms. a pint of jack does wonders to my mood and pretty much ruins coherence to my writings...
Is this a new unit? Could be a cold solder point(s).
Or maybe a corroded volume pot that needs a good cleaning?
Aren't transistors alien technology?
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