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Forum: Theory & Design

  1. Sticky Thread Sticky: making sure I understand OT secondary ground

    Started by dmartn149, 08-31-2019 09:08 PM
    • Replies: 7
    • Views: 2,338
    09-02-2019, 06:06 AM Go to last post
  1. Subbing a resistor for a speaker

    Started by Randall, 06-13-2019 10:16 PM
    • Replies: 11
    • Views: 942
    06-14-2019, 10:49 PM Go to last post
  2. How to determine fuse rating

    Started by Randall, 06-12-2019 11:28 PM
    • Replies: 16
    • Views: 1,256
    06-14-2019, 08:21 PM Go to last post
  3. Hammond power supply cap subs

    Started by Randall, 06-07-2019 12:33 AM
    • Replies: 7
    • Views: 768
    06-11-2019, 10:50 PM Go to last post
  4. Output tube impedance

    Started by DaBreeze, 11-16-2009 12:38 PM
    2 Pages
    1 2
    • Replies: 59
    • Views: 23,956
    06-10-2019, 04:43 AM Go to last post
  5. Marshall origin series 20w....why 20?

    Started by daz, 06-09-2019 08:41 PM
    • Replies: 5
    • Views: 722
    06-10-2019, 04:24 AM Go to last post
  6. Dumb series/12.6V heater questions

    Started by Zozobra, 06-04-2019 11:18 AM
    • Replies: 5
    • Views: 669
    06-06-2019, 02:15 PM Go to last post
  7. Effects loop. why?

    Started by Sea Chief, 05-26-2019 02:55 PM
    3 Pages
    1 2 3
    • Replies: 83
    • Views: 3,473
    06-06-2019, 01:34 PM Go to last post
  8. low voltage single ended el84

    Started by cminor9, 05-29-2019 04:25 AM
    • Replies: 34
    • Views: 2,256
    06-05-2019, 02:52 PM Go to last post
  9. Ghost Notes - Use Scope to Track down ?

    Started by HaroldBrooks, 05-24-2019 12:41 AM
    • Replies: 16
    • Views: 1,043
    05-24-2019, 05:19 AM Go to last post
  10. Power supply variation

    Started by nsubulysses, 05-18-2019 08:58 AM
    • Replies: 24
    • Views: 1,665
    05-23-2019, 08:32 PM Go to last post
  11. PI drive for 6 power tube amp

    Started by nsubulysses, 05-20-2019 08:03 PM
    • Replies: 5
    • Views: 677
    05-21-2019, 10:17 PM Go to last post
  12. Ever wonder about the Sprague Atom controversy?

    Started by Randall, 05-17-2019 10:35 PM
    • Replies: 22
    • Views: 1,696
    05-20-2019, 12:53 PM Go to last post
    • Replies: 13
    • Views: 1,183
    05-19-2019, 05:09 PM Go to last post
  13. Maximum DC voltage on output of amp?

    Started by Axtman, 05-14-2019 04:57 AM
    • Replies: 2
    • Views: 562
    05-14-2019, 03:25 PM Go to last post
  14. cabinet shielding question

    Started by Randall, 05-06-2019 02:07 AM
    • Replies: 18
    • Views: 1,464
    05-12-2019, 02:50 AM Go to last post
  15. Pentode Triode Switch

    Started by überfuzz, 05-09-2019 01:45 PM
    • Replies: 5
    • Views: 906
    05-11-2019, 02:03 AM Go to last post
  16. 12DW7 Reverb

    Started by Natman, 12-02-2010 05:52 PM
    • Replies: 25
    • Views: 9,326
    05-09-2019, 03:09 AM Go to last post
  17. Tube reverb driver circuits

    Started by Rhodesplyr, 04-17-2010 01:58 AM
    • Replies: 18
    • Views: 12,843
    05-08-2019, 11:00 AM Go to last post
  18. Considerations For Replacing Power Transistors

    Started by TomCarlos, 05-02-2019 06:16 PM
    • Replies: 3
    • Views: 618
    05-03-2019, 04:08 PM Go to last post
  19. 5T4 sub for 5Y3 ?

    Started by HaroldBrooks, 05-02-2019 07:31 AM
    • Replies: 6
    • Views: 651
    05-03-2019, 04:31 AM Go to last post
    • Replies: 7
    • Views: 829
    05-01-2019, 11:15 PM Go to last post
  20. Uneven Cathode Bias Resistance

    Started by HaroldBrooks, 04-05-2019 07:22 PM
    • Replies: 13
    • Views: 1,345
    05-01-2019, 02:05 AM Go to last post
  21. 100 watts with two 6L6GC tubes?!

    Started by Axtman, 04-29-2019 02:17 AM
    • Replies: 11
    • Views: 1,139
    04-29-2019, 02:25 PM Go to last post
    • Replies: 10
    • Views: 1,119
    04-27-2019, 03:48 PM Go to last post
  22. Preamp tubes 12V heater

    Started by überfuzz, 04-24-2019 10:36 AM
    • Replies: 1
    • Views: 573
    04-24-2019, 08:45 PM Go to last post
    • Replies: 23
    • Views: 1,731
    04-24-2019, 04:37 PM Go to last post

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