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Forum: Theory & Design

  1. PT and OT transformer core orientation

    Started by mikepukmel, 08-13-2019 12:35 AM
    • Replies: 6
    • Views: 221
    08-13-2019, 06:27 PM Go to last post
  2. Bootstrapped Gain Stage Theory

    Started by SoulFetish, 07-15-2019 01:54 AM
    2 Pages
    1 2
    • Replies: 39
    • Views: 1,265
    08-11-2019, 11:21 PM Go to last post
  3. adding line out to a speaker output

    Started by Randall, 08-08-2019 12:01 AM
    • Replies: 33
    • Views: 589
    08-11-2019, 01:09 AM Go to last post
  4. Selmer Treble and Bass 50W MkII

    Started by yeeshkul, 08-09-2019 06:43 PM
    • Replies: 6
    • Views: 220
    08-10-2019, 10:47 PM Go to last post
  5. DC filaments (ECC803) on a dedicated winding

    Started by Gtr0, 07-28-2019 10:21 AM
    • Replies: 24
    • Views: 741
    08-08-2019, 05:46 AM Go to last post
  6. Choke experiment

    Started by nsubulysses, 07-19-2019 06:13 PM
    • Replies: 7
    • Views: 381
    08-08-2019, 05:28 AM Go to last post
    • Replies: 20
    • Views: 714
    08-07-2019, 08:19 PM Go to last post
  7. How does the B+ go high?

    Started by dcoyle, 08-05-2019 12:15 AM
    • Replies: 21
    • Views: 560
    08-06-2019, 10:38 PM Go to last post
  8. Little theory please

    Started by catalin gramada, 08-01-2019 11:33 PM
    • Replies: 24
    • Views: 660
    08-05-2019, 02:48 PM Go to last post
  9. Sovtek 6550 datasheet question

    Started by Randall, 07-30-2019 07:45 PM
    • Replies: 13
    • Views: 447
    08-04-2019, 05:26 AM Go to last post
  10. 1967 AB763 Bandmaster cap mods

    Started by Randall, 07-29-2019 01:10 AM
    • Replies: 27
    • Views: 704
    08-01-2019, 02:24 AM Go to last post
    • Replies: 7
    • Views: 2,913
    07-28-2019, 08:14 PM Go to last post
  11. Diy Preamp section of a guitar amp.

    Started by wagnar, 07-20-2019 06:01 PM
    • Replies: 10
    • Views: 511
    07-27-2019, 08:25 PM Go to last post
  12. Question Blues deluxe repairs & mods - advice needed

    Started by NoelW, 07-25-2019 01:18 AM
    • Replies: 4
    • Views: 303
    07-27-2019, 04:27 AM Go to last post
  13. Series Resistor or Voltage Divider ?

    Started by HaroldBrooks, 07-24-2019 08:24 PM
    • Replies: 7
    • Views: 364
    07-25-2019, 08:59 PM Go to last post
  14. DC DC converter

    Started by uneumann, 07-19-2019 12:26 AM
    • Replies: 16
    • Views: 478
    07-23-2019, 08:42 AM Go to last post
  15. Small DC Stepdown Board, Never gets hot ?

    Started by HaroldBrooks, 07-19-2019 10:51 PM
    • Replies: 5
    • Views: 294
    07-20-2019, 12:51 PM Go to last post
  16. Bad Cat Hot Cat 15 Questions

    Started by Fred G., 07-07-2019 06:37 AM
    • Replies: 8
    • Views: 514
    07-18-2019, 02:49 PM Go to last post
    • Replies: 11
    • Views: 592
    07-18-2019, 01:01 PM Go to last post
  17. Screen current, straighten me out

    Started by Randall, 07-13-2019 03:16 AM
    • Replies: 17
    • Views: 634
    07-17-2019, 09:12 PM Go to last post
  18. power supply capacitor size in tube amps

    Started by mikepukmel, 07-14-2019 09:03 PM
    • Replies: 14
    • Views: 491
    07-16-2019, 09:37 PM Go to last post
    • Replies: 47
    • Views: 2,521
    07-16-2019, 12:06 AM Go to last post
  19. Capacitance questions

    Started by Randall, 07-07-2019 08:59 PM
    • Replies: 27
    • Views: 960
    07-11-2019, 10:35 AM Go to last post
  20. PT primary wiring question

    Started by nsubulysses, 07-07-2019 09:54 PM
    • Replies: 23
    • Views: 863
    07-11-2019, 06:25 AM Go to last post
  21. pentode/triode switch

    Started by Randall, 07-08-2019 12:43 AM
    • Replies: 17
    • Views: 712
    07-10-2019, 11:29 AM Go to last post
  22. Shared cathode bypass

    Started by Randall, 08-12-2017 11:46 PM
    • Replies: 8
    • Views: 1,455
    07-09-2019, 08:50 PM Go to last post
  23. Interesting Dual Triode Compressor Circuit.

    Started by SoulFetish, 07-04-2019 04:22 PM
    • Replies: 24
    • Views: 830
    07-08-2019, 07:31 AM Go to last post

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