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In Reply to: "the venerable 6SN7" posted by 1973shovel on July 2, 2021 at 12:42:06:
Is the 6SN7 version still a single gain stage driving a long tailed pair, with all three sections being 'SN7? That's not enough gain to drive the EL34s to full output unless feedback is reduced to almost nothing. The same would be true of course if all sections were 12AU7s.
In any event, if an amplifier performs the same with 12AU7s as it does with 6SN7s, that might suggest to me that something is deficient elsewhere in the amplifier. These two tubes are really at opposite ends of the spectrum when it comes to audiophile-grade reproduction.
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Follow Ups
- RE: "the venerable 6SN7" - Triode_Kingdom 15:54:31 07/02/21 (8)
- "Is the 6SN7 version...?" - 1973shovel 18:34:55 07/02/21 (5)
- VTA Amplifiers - Triode_Kingdom 21:50:16 07/02/21 (4)
- RE: VTA Amplifiers - pictureguy 00:53:29 07/04/21 (1)
- RE: VTA Amplifiers - Palustris 07:51:27 07/05/21 (0)
- I agree 100% - 1973shovel 05:24:20 07/03/21 (1)
- RE: I agree 100% - pictureguy 16:02:03 07/07/21 (0)
- RE: "the venerable 6SN7" - airtime 16:02:59 07/02/21 (1)
- Schematic (I think) - Triode_Kingdom 20:52:44 07/02/21 (0)