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Forum: Tubes (Valves)

  1. Visual signs of a bad tube?

    Started by Axtman, 08-12-2018 03:09 AM
    • Replies: 2
    • Views: 196
    08-15-2018, 12:06 AM Go to last post
  2. Tube rattle?

    Started by tubedood, 08-06-2018 11:21 PM
    • Replies: 3
    • Views: 173
    08-07-2018, 04:49 AM Go to last post
    • Replies: 9
    • Views: 392
    08-03-2018, 06:53 PM Go to last post
  3. 6SQ7? In a Gibson GA-20...

    Started by Justin Thomas, 10-03-2017 10:38 PM
    • Replies: 3
    • Views: 504
    08-02-2018, 01:01 AM Go to last post
  4. 6L6GC or 5881?

    Started by Randall, 07-02-2018 03:27 AM
    • Replies: 15
    • Views: 638
    07-22-2018, 02:20 PM Go to last post
  5. JJ EL34 II

    Started by Mick Bailey, 05-13-2018 06:52 PM
    • Replies: 6
    • Views: 620
    07-20-2018, 03:01 AM Go to last post
  6. telling unmarked preamp tubes apart

    Started by Randall, 06-30-2018 06:31 PM
    • Replies: 7
    • Views: 312
    07-01-2018, 05:34 PM Go to last post
  7. Original Sovtek 5881 (coin/wafer based)

    Started by Gtr0, 06-26-2018 02:23 PM
    • Replies: 5
    • Views: 265
    06-27-2018, 12:14 PM Go to last post
  8. KT55 Tubes

    Started by kpsta, 06-07-2018 08:23 PM
    • Replies: 1
    • Views: 381
    06-08-2018, 12:08 AM Go to last post
  9. Sovtek 6SL7

    Started by Mick Bailey, 03-19-2018 01:47 PM
    • Replies: 2
    • Views: 708
    04-01-2018, 09:24 AM Go to last post
  10. Modern 6550?

    Started by Randall, 03-22-2018 09:05 PM
    • Replies: 4
    • Views: 566
    03-23-2018, 05:49 PM Go to last post
  11. RCA JAN 83 rectifier tube flakes

    Started by Randall, 02-22-2018 05:58 AM
    • Replies: 9
    • Views: 718
    02-22-2018, 09:46 PM Go to last post
  12. Modern 5y3s

    Started by bluzmn, 12-23-2016 04:05 PM
    • Replies: 9
    • Views: 1,018
    02-03-2018, 08:07 PM Go to last post
  13. Mod'ing a tube circuit (from early 60's stereo turntable)

    Started by TubeNoob, 10-17-2016 01:06 PM
    3 Pages
    1 2 3
    • Replies: 97
    • Views: 5,482
    01-28-2018, 04:18 PM Go to last post
  14. JJ6V6

    Started by uneumann, 12-30-2017 08:52 PM
    • Replies: 31
    • Views: 1,694
    01-10-2018, 05:36 AM Go to last post
  15. New TAD tube

    Started by nosaj, 01-08-2018 11:13 PM
    • Replies: 13
    • Views: 640
    01-09-2018, 10:53 PM Go to last post
  16. Getter flash spots changing over time

    Started by KRKozBassman, 11-29-2017 03:05 PM
    • Replies: 4
    • Views: 577
    12-29-2017, 04:34 AM Go to last post
  17. Sovtek EL84m tests poor in Orange valve tester??

    Started by 1ampman, 09-19-2017 12:13 AM
    • Replies: 9
    • Views: 868
    10-20-2017, 01:45 AM Go to last post
  18. 6ak6-tone-experience?

    Started by Chuck H, 10-06-2017 02:31 AM
    2 Pages
    1 2
    • Replies: 52
    • Views: 1,578
    10-16-2017, 01:59 AM Go to last post
  19. Marshall Branded Tubes

    Started by LesterPTelestrat, 10-09-2017 09:01 PM
    • Replies: 8
    • Views: 948
    10-12-2017, 06:55 PM Go to last post
  20. Ultra Linear Tap percentage

    Started by mpegjohn, 10-05-2017 01:11 PM
    • Replies: 2
    • Views: 409
    10-05-2017, 02:24 PM Go to last post
  21. Is a halo the sign of a bad tube?

    Started by Axtman, 09-04-2017 07:19 PM
    • Replies: 2
    • Views: 643
    09-05-2017, 11:26 AM Go to last post
    • Replies: 7
    • Views: 830
    08-10-2017, 07:24 AM Go to last post
    • Replies: 4
    • Views: 523
    08-04-2017, 10:14 AM Go to last post
  22. Anybody looked at tube perveance values?

    Started by Old Tele man, 12-03-2013 08:50 PM
    • Replies: 15
    • Views: 1,841
    07-27-2017, 02:39 AM Go to last post
    • Replies: 17
    • Views: 2,013
    07-20-2017, 01:52 AM Go to last post
  23. Tube ID?

    Started by Axtman, 07-10-2017 04:52 AM
    • Replies: 8
    • Views: 634
    07-11-2017, 10:50 PM Go to last post
  24. Found this old schematic

    Started by Peregrine, 07-03-2017 11:03 PM
    • Replies: 17
    • Views: 903
    07-07-2017, 04:48 PM Go to last post

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