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Forum: Theory & Design

  1. Weird OT issue ?

    Started by catalin gramada, Today 09:56 AM
    • Replies: 0
    • Views: 26
    Today, 09:56 AM Go to last post
  2. Choke experiment

    Started by nsubulysses, 07-19-2019 06:13 PM
    • Replies: 9
    • Views: 445
    Today, 07:34 AM Go to last post
  3. PT and OT transformer core orientation

    Started by mikepukmel, 08-13-2019 12:35 AM
    • Replies: 21
    • Views: 550
    Yesterday, 10:06 PM Go to last post
    • Replies: 38
    • Views: 1,383
    Yesterday, 01:23 AM Go to last post
  4. Bootstrapped Gain Stage Theory

    Started by SoulFetish, 07-15-2019 01:54 AM
    2 Pages
    1 2
    • Replies: 39
    • Views: 1,412
    08-11-2019, 11:21 PM Go to last post
  5. adding line out to a speaker output

    Started by Randall, 08-08-2019 12:01 AM
    • Replies: 33
    • Views: 717
    08-11-2019, 01:09 AM Go to last post
  6. Selmer Treble and Bass 50W MkII

    Started by yeeshkul, 08-09-2019 06:43 PM
    • Replies: 6
    • Views: 272
    08-10-2019, 10:47 PM Go to last post
  7. DC filaments (ECC803) on a dedicated winding

    Started by Gtr0, 07-28-2019 10:21 AM
    • Replies: 24
    • Views: 812
    08-08-2019, 05:46 AM Go to last post
    • Replies: 20
    • Views: 763
    08-07-2019, 08:19 PM Go to last post
  8. How does the B+ go high?

    Started by dcoyle, 08-05-2019 12:15 AM
    • Replies: 21
    • Views: 641
    08-06-2019, 10:38 PM Go to last post
  9. Little theory please

    Started by catalin gramada, 08-01-2019 11:33 PM
    • Replies: 24
    • Views: 732
    08-05-2019, 02:48 PM Go to last post
  10. Sovtek 6550 datasheet question

    Started by Randall, 07-30-2019 07:45 PM
    • Replies: 13
    • Views: 488
    08-04-2019, 05:26 AM Go to last post
  11. 1967 AB763 Bandmaster cap mods

    Started by Randall, 07-29-2019 01:10 AM
    • Replies: 27
    • Views: 771
    08-01-2019, 02:24 AM Go to last post
    • Replies: 7
    • Views: 2,950
    07-28-2019, 08:14 PM Go to last post
  12. Diy Preamp section of a guitar amp.

    Started by wagnar, 07-20-2019 06:01 PM
    • Replies: 10
    • Views: 554
    07-27-2019, 08:25 PM Go to last post
  13. Question Blues deluxe repairs & mods - advice needed

    Started by NoelW, 07-25-2019 01:18 AM
    • Replies: 4
    • Views: 336
    07-27-2019, 04:27 AM Go to last post
  14. Series Resistor or Voltage Divider ?

    Started by HaroldBrooks, 07-24-2019 08:24 PM
    • Replies: 7
    • Views: 409
    07-25-2019, 08:59 PM Go to last post
  15. DC DC converter

    Started by uneumann, 07-19-2019 12:26 AM
    • Replies: 16
    • Views: 509
    07-23-2019, 08:42 AM Go to last post
  16. Small DC Stepdown Board, Never gets hot ?

    Started by HaroldBrooks, 07-19-2019 10:51 PM
    • Replies: 5
    • Views: 325
    07-20-2019, 12:51 PM Go to last post
  17. Bad Cat Hot Cat 15 Questions

    Started by Fred G., 07-07-2019 06:37 AM
    • Replies: 8
    • Views: 539
    07-18-2019, 02:49 PM Go to last post
    • Replies: 11
    • Views: 622
    07-18-2019, 01:01 PM Go to last post
  18. Screen current, straighten me out

    Started by Randall, 07-13-2019 03:16 AM
    • Replies: 17
    • Views: 666
    07-17-2019, 09:12 PM Go to last post
  19. power supply capacitor size in tube amps

    Started by mikepukmel, 07-14-2019 09:03 PM
    • Replies: 14
    • Views: 533
    07-16-2019, 09:37 PM Go to last post
    • Replies: 47
    • Views: 2,600
    07-16-2019, 12:06 AM Go to last post
  20. Capacitance questions

    Started by Randall, 07-07-2019 08:59 PM
    • Replies: 27
    • Views: 1,008
    07-11-2019, 10:35 AM Go to last post
  21. PT primary wiring question

    Started by nsubulysses, 07-07-2019 09:54 PM
    • Replies: 23
    • Views: 903
    07-11-2019, 06:25 AM Go to last post
  22. pentode/triode switch

    Started by Randall, 07-08-2019 12:43 AM
    • Replies: 17
    • Views: 748
    07-10-2019, 11:29 AM Go to last post
  23. Shared cathode bypass

    Started by Randall, 08-12-2017 11:46 PM
    • Replies: 8
    • Views: 1,484
    07-09-2019, 08:50 PM Go to last post

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