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Forum: Theory & Design

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

    Started by dmartn149, 08-31-2019 10:08 PM
    • Replies: 7
    • Views: 915
    09-02-2019, 07:06 AM Go to last post
  1. Cathode follower without elevated heater voltage

    Started by Dark Mavis, 03-03-2019 02:26 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 132
    • Views: 4,678
    12-06-2019, 07:29 PM Go to last post
  2. Quick question regard biasing

    Started by catalin gramada, 12-02-2019 03:02 PM
    • Replies: 16
    • Views: 341
    12-03-2019, 05:31 PM Go to last post
  3. Dual tap OT quandry

    Started by Randall, 11-23-2019 10:30 PM
    • Replies: 34
    • Views: 619
    12-03-2019, 03:48 AM Go to last post
  4. DC heater variations

    Started by m1989jmp, 12-01-2019 11:42 AM
    • Replies: 4
    • Views: 210
    12-02-2019, 09:29 AM Go to last post
    • Replies: 22
    • Views: 403
    11-30-2019, 05:36 PM Go to last post
    • Replies: 15
    • Views: 585
    11-30-2019, 08:16 AM Go to last post
    • Replies: 2
    • Views: 122
    11-29-2019, 09:09 PM Go to last post
  5. Pentode Screen Capacitors ? I don't get it !

    Started by HaroldBrooks, 11-27-2019 03:00 PM
    • Replies: 10
    • Views: 264
    11-28-2019, 05:57 PM Go to last post
  6. I want to build an amp selector (two amps a/b, one cab)

    Started by Gtr0, 10-05-2019 08:52 AM
    3 Pages
    1 2 3
    • Replies: 83
    • Views: 2,283
    11-28-2019, 01:13 PM Go to last post
    • Replies: 3
    • Views: 185
    11-22-2019, 02:17 PM Go to last post
  7. Output transformer Harmonics Cancellation ?

    Started by HaroldBrooks, 11-19-2019 01:15 PM
    • Replies: 22
    • Views: 417
    11-20-2019, 02:26 PM Go to last post
    • Replies: 6
    • Views: 146
    11-20-2019, 01:07 PM Go to last post
    • Replies: 19
    • Views: 1,109
    11-18-2019, 04:00 PM Go to last post
  8. Peavey MX VTX Series Amp - Output Section

    Started by TomCarlos, 11-17-2019 06:37 PM
    • Replies: 6
    • Views: 204
    11-18-2019, 03:24 PM Go to last post
  9. 2-way speaker crossover design

    Started by m1989jmp, 10-26-2019 12:17 PM
    • Replies: 8
    • Views: 375
    11-17-2019, 10:32 AM Go to last post
  10. VHT/Fryette power amps

    Started by kostic2000, 11-15-2019 11:49 AM
    • Replies: 8
    • Views: 375
    11-15-2019, 10:47 PM Go to last post
  11. Transformers

    Started by vintagekiki, 07-20-2018 11:34 PM
    • Replies: 8
    • Views: 1,299
    11-07-2019, 05:29 AM Go to last post
  12. What is one KT66 doing in a EL34 amp?

    Started by Randall, 11-01-2019 01:20 AM
    • Replies: 26
    • Views: 659
    11-02-2019, 12:46 AM Go to last post
    • Replies: 8
    • Views: 407
    11-01-2019, 03:52 AM Go to last post
    • Replies: 4
    • Views: 326
    10-31-2019, 03:35 PM Go to last post
    • Replies: 7
    • Views: 344
    10-31-2019, 11:23 AM Go to last post
    • Replies: 14
    • Views: 426
    10-31-2019, 11:18 AM Go to last post
    • Replies: 1
    • Views: 165
    10-28-2019, 06:04 PM Go to last post
  13. Zener Diodes to drop Heater Voltage ?

    Started by HaroldBrooks, 10-25-2019 08:22 PM
    • Replies: 31
    • Views: 711
    10-27-2019, 08:56 PM Go to last post
    • Replies: 8
    • Views: 368
    10-25-2019, 09:50 AM Go to last post
  14. 2 cascaded push pull

    Started by tepsamps, 10-22-2019 11:12 PM
    • Replies: 8
    • Views: 422
    10-24-2019, 04:34 AM Go to last post
  15. Doofus-Proofing Bias Supply

    Started by Justin Thomas, 10-11-2019 08:21 PM
    • Replies: 21
    • Views: 732
    10-22-2019, 10:02 PM Go to last post
  16. Swap out different Preamp Tube Type ?

    Started by HaroldBrooks, 09-26-2019 05:18 AM
    • Replies: 21
    • Views: 936
    10-22-2019, 05:14 PM Go to last post

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