RE: 6DJ8

RE: 6DJ8

Posted by JKT (A) on April 28, 2025 at 18:03:00

In Reply to: 6DJ8 posted by PakProtector on April 24, 2025 at 03:37:56:

I have a fully differential phono pre with a MOSFET/vacuum tube (6DJ8,6N23) cascode input stage. Recently I screened all the 6DJ8 family tubes in my stash for low noise, low microphonics, and balanced sections. Out of over two dozen tubes tested I found only one pair of Mullard ECC88s and four orange globe Amperex 7308s. The two 6N23s that I recently purchased from Kevin Deal's "Special Stash", for a pretty penny, passed for low noise and microphonics; but, one was not as balanced as I would like. All the Amperex white label PQ 6922s and Siemens didn't pass.

If you want to use 6DJ8s in a phono stage keep in mind finding low noise/low microphonic examples could be a challenge.

"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln

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Follow Ups Full Thread

Topic - What are the popular tubes for a phono preamp? - Leo loves music 05:34:17 04/19/25 (22)

6DJ8 - PakProtector 03:37:56 04/24/25 (2)

despite my partiality. to this tube overall circuit desgn gets the nod - Cleantimestream 16:38:42 05/03/25 (0)

RE: 6DJ8 - JKT 18:03:00 04/28/25 (0)

RE: What are the popular tubes for a phono preamp? - 6bq5 07:01:54 04/19/25 (18)

RE: What are the popular tubes for a phono preamp? - Leo loves music 07:13:56 04/19/25 (17)

RE: What are the popular tubes for a phono preamp? - Triode_Kingdom 14:47:42 04/19/25 (16)

Eli liked this Version of the RCA phono circuit - Chip647 12:43:15 04/21/25 (15)

Here's my version - Triode_Kingdom 08:42:30 04/22/25 (12)

RE: Here's my version - sideliner 17:46:05 04/22/25 (5)

RE: Here's my version - Triode_Kingdom 00:32:57 04/24/25 (4)

RE: Here's my version - deafbykhorns 06:02:30 04/29/25 (2)

RE: Here's my version - Triode_Kingdom 14:26:07 04/29/25 (1)

RE: Here's my version - deafbykhorns 10:24:21 04/30/25 (0)

RE: Here's my version - sideliner 12:53:28 04/24/25 (0)

appreciate it - Leo loves music 09:01:05 04/22/25 (5)

RE: appreciate it - Triode_Kingdom 00:22:25 04/24/25 (4)

Pet peeve - Tre' 07:07:34 04/24/25 (1)

OK, fixed it - Triode_Kingdom 08:21:16 04/24/25 (0)

thanks - Leo loves music 01:18:15 04/24/25 (1)

More than you know! - Triode_Kingdom 08:16:18 04/24/25 (0)

Not sure - Leo loves music 13:16:11 04/21/25 (1)

If you don't want to DIY (this is the tube DIY forum) then just buy something like this - Chip647 09:03:00 04/23/25 (0)

Follow Ups

RE: 6DJ8 - JKT 18:03:00 04/28/25 (0)

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