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In Reply to: RE: Calling it Quits at ~150 hours posted by ACHiPo on October 24, 2021 at 08:40:43:
The RCA 5692 was once the "cat's pajamas" among 6SN7 substitutes, but it lost favor over time. I used them in my MFA Luminescence back in the 90s, and then in my MP1. I think I also used them as driver tubes in my MA240 amplifiers, once upon a time. I grew to prefer either the KenRad 6SN7GT/VT231 (black glass) or the RCA 6SN7GT gray glass type, over the 5692. But the 5692 may be less prone to microphonics than most 6SN7s, due to its special sturdier internal construction, as you experienced. In the circlotron output stage of my MP1, I use Brimars.
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Follow Ups
- RE: Calling it Quits at ~150 hours - Lew 09:41:47 11/10/21 (2)
- RE: Calling it Quits at ~150 hours - ACHiPo 11:21:02 11/10/21 (1)
- Tube inflation - Lew 10:31:20 11/14/21 (0)
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