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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: 474
    09-02-2019, 06:06 AM Go to last post
  1. I want to build an amp selector (two amps a/b, one cab)

    Started by Gtr0, 10-05-2019 07:52 AM
    2 Pages
    1 2
    • Replies: 46
    • Views: 712
    Today, 12:35 PM Go to last post
  2. DC at both tone controls ?

    Started by HaroldBrooks, 10-13-2019 07:32 AM
    • Replies: 13
    • Views: 236
    Today, 01:17 AM Go to last post
  3. Current Ratings for amp and Power Transformers

    Started by Gtr0, 10-09-2019 08:30 AM
    • Replies: 20
    • Views: 293
    10-13-2019, 10:44 PM Go to last post
  4. Doofus-Proofing Bias Supply

    Started by Justin Thomas, 10-11-2019 07:21 PM
    • Replies: 15
    • Views: 211
    10-12-2019, 03:36 PM Go to last post
    • Replies: 27
    • Views: 391
    10-09-2019, 11:20 PM Go to last post
  5. Swap out different Preamp Tube Type ?

    Started by HaroldBrooks, 09-26-2019 04:18 AM
    • Replies: 16
    • Views: 468
    10-08-2019, 02:01 AM Go to last post
  6. Switchable Global NFB options

    Started by Gtr0, 10-04-2019 04:24 AM
    • Replies: 10
    • Views: 267
    10-06-2019, 10:55 AM Go to last post
  7. Fender 68 prri

    Started by clintronics, 09-19-2019 02:27 AM
    • Replies: 7
    • Views: 297
    09-30-2019, 04:08 PM Go to last post
    • Replies: 12
    • Views: 496
    09-29-2019, 06:45 AM Go to last post
  8. neg grid voltage limit

    Started by uneumann, 09-21-2019 09:21 PM
    • Replies: 7
    • Views: 312
    09-23-2019, 06:59 PM Go to last post
    • Replies: 15
    • Views: 586
    09-17-2019, 05:43 PM Go to last post
  9. Question Gain stage bypass - query

    Started by NoelW, 09-11-2019 03:22 AM
    • Replies: 18
    • Views: 468
    09-14-2019, 04:17 AM Go to last post
  10. Hiwatt dr201 PT

    Started by tepsamps, 09-08-2019 09:55 AM
    • Replies: 10
    • Views: 367
    09-13-2019, 04:28 PM Go to last post
  11. Physically determine speaker wattage?

    Started by Axtman, 09-10-2019 06:00 AM
    • Replies: 15
    • Views: 430
    09-13-2019, 02:58 PM Go to last post
    • Replies: 49
    • Views: 3,028
    09-13-2019, 08:11 AM Go to last post
  12. Bootstrapped Gain Stage Theory

    Started by SoulFetish, 07-15-2019 01:54 AM
    3 Pages
    1 2 3
    • Replies: 70
    • Views: 2,281
    09-12-2019, 10:46 PM Go to last post
  13. The Lion Tamer

    Started by Jazz P Bass, 09-10-2019 04:32 PM
    • Replies: 8
    • Views: 286
    09-12-2019, 07:36 PM Go to last post
  14. Paraphase inverter question

    Started by catalin gramada, 08-30-2019 10:00 AM
    5 Pages
    1 2 3 ... 5
    • Replies: 141
    • Views: 2,345
    09-11-2019, 03:54 PM Go to last post
  15. Test New Output Transformer

    Started by HaroldBrooks, 09-05-2019 09:08 PM
    • Replies: 9
    • Views: 255
    09-06-2019, 06:52 PM Go to last post
  16. KT150 push pull

    Started by tepsamps, 09-03-2019 11:09 PM
    • Replies: 7
    • Views: 318
    09-05-2019, 08:23 PM Go to last post
    • Replies: 138
    • Views: 6,577
    09-03-2019, 09:31 AM Go to last post
  17. Paraphase inverter question

    Started by catalin gramada, 08-30-2019 09:52 AM
    • Replies: 0
    • Views: 124
    08-30-2019, 09:52 AM Go to last post
  18. Weird OT issue ?

    Started by catalin gramada, 08-25-2019 09:56 AM
    • Replies: 15
    • Views: 474
    08-28-2019, 04:08 AM Go to last post
  19. Choke experiment

    Started by nsubulysses, 07-19-2019 06:13 PM
    • Replies: 9
    • Views: 641
    08-25-2019, 07:34 AM Go to last post
  20. PT and OT transformer core orientation

    Started by mikepukmel, 08-13-2019 12:35 AM
    • Replies: 21
    • Views: 787
    08-24-2019, 10:06 PM Go to last post
    • Replies: 38
    • Views: 1,657
    08-24-2019, 01:23 AM Go to last post
  21. adding line out to a speaker output

    Started by Randall, 08-08-2019 12:01 AM
    • Replies: 33
    • Views: 878
    08-11-2019, 01:09 AM Go to last post
  22. Selmer Treble and Bass 50W MkII

    Started by yeeshkul, 08-09-2019 06:43 PM
    • Replies: 6
    • Views: 425
    08-10-2019, 10:47 PM Go to last post

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