Best sounding power pentode/tetrode in triode for SE?

Posted by andy evans (A) on October 3, 2020 at 02:14:02

For the last 12 years I've been using either SE 300b outputs or PSE 4P1L outputs (a pair). This sets a very high level of sound quality. I'm wondering if there's an indirectly heated tube that can approach this level of sound. I'm only interested in triode operation here. Looking for 15W to 18W dissipation, something like 60mA and 250v-300v a-k as a minimum, but that would be enough.

Contenders in PSE for a pair of tubes could be 6V6, EL84 or a lot of older tubes like KT61 and its variants.

Contenders in SE are EL34, 6L6-GC, 5881, 6550, KT88, GU50, 6CB5A etc. From what I read the EL34 has the best triode curves, though others like 6CB5A and GU50 have fans.

It may be the case that none of these can match a 300b or PSE 4P1L. Just want to know what comes close.

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Topic - Best sounding power pentode/tetrode in triode for SE? - andy evans 02:14:02 10/03/20 (17)

RE: Best sounding power pentode/tetrode in triode for SE? - Cleantimestream 10:11:25 10/27/20 (0)

How about PT 15 valve - bouncy ball 09:16:49 10/06/20 (3)

RE: How about PT 15 valve - andy evans 07:44:09 10/07/20 (2)

sorry, i don't have that informaion(nt) - bouncy ball 06:30:17 10/08/20 (1)

RE: sorry, i don't have that informaion(nt) - kobasa@xs4all.nl 11:49:14 10/10/20 (0)

RE: 6CB5A - good power in triode mode - deathtube 667 03:09:40 10/06/20 (1)

RE: 6CB5A - good power in triode mode - PakProtector 08:50:07 10/06/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - Boli46 01:52:39 10/06/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - PakProtector 06:21:08 10/04/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - dhsettim 16:47:38 10/03/20 (4)

RE: Best sounding power pentode/tetrode in triode for SE? - hahax@verizon.net 20:19:37 10/04/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - Tre' 10:56:58 10/04/20 (2)

There's a reason for that.., - Steve O 20:58:41 10/04/20 (1)

Thanks nt - Tre' 11:10:27 10/05/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - FlaCharlie 08:22:16 10/03/20 (0)

RE: Best sounding power pentode/tetrode in triode for SE? - Eli Duttman 04:32:26 10/03/20 (1)

Is GU50 a contender? - andy evans 06:45:25 10/03/20 (0)

Best sounding power pentode/tetrode in triode for SE?

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