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In Reply to: Art Audio Phono Stage Only Putting Out One Channel posted by AnalogJ on August 4, 2024 at 18:19:31:
That tube is probably a 6FQ7 [not GFQ7] and it's a twin triode. I'm not sure how it is being used in the high voltage power supply but possibly as a regulator. The main high voltage rectifier appears to be a solid-state bridge.
If the 6FQ7 tube is flashing during power-ON, don't you think you might start there? Swapping the other tubes (12AX7) might damage the good ones.
I see 6FQ7 tubes at thetubestore and tubedepot for around $30 - $40 ea.
I had a couple 6FQ7 in my ancient Conrad-Johnson Premier 11a tube amp. Ok, it wasn't THAT ancient but I replaced it with a pair of much better sounding (and much cheaper) AES/Cary SixPac EL34 monoblocks.
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Follow Ups
- That's probably a 6FQ7 twin triode - AbeCollins 08:19:33 08/05/24 (1)
- RE: That's probably a 6FQ7 twin triode - AnalogJ 08:57:52 08/05/24 (0)
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