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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: 704
    09-02-2019, 07:06 AM Go to last post
  1. 2-way speaker crossover design

    Started by m1989jmp, 10-26-2019 12:17 PM
    • Replies: 6
    • Views: 196
    11-10-2019, 05:31 PM Go to last post
    • Replies: 11
    • Views: 367
    11-08-2019, 01:22 AM Go to last post
  2. Transformers

    Started by vintagekiki, 07-20-2018 11:34 PM
    • Replies: 8
    • Views: 1,171
    11-07-2019, 05:29 AM Go to last post
  3. What is one KT66 doing in a EL34 amp?

    Started by Randall, 11-01-2019 01:20 AM
    • Replies: 26
    • Views: 421
    11-02-2019, 12:46 AM Go to last post
    • Replies: 8
    • Views: 242
    11-01-2019, 03:52 AM Go to last post
    • Replies: 4
    • Views: 167
    10-31-2019, 03:35 PM Go to last post
    • Replies: 7
    • Views: 208
    10-31-2019, 11:23 AM Go to last post
    • Replies: 14
    • Views: 274
    10-31-2019, 11:18 AM Go to last post
    • Replies: 1
    • Views: 95
    10-28-2019, 06:04 PM Go to last post
  4. Zener Diodes to drop Heater Voltage ?

    Started by HaroldBrooks, 10-25-2019 08:22 PM
    • Replies: 31
    • Views: 455
    10-27-2019, 08:56 PM Go to last post
    • Replies: 8
    • Views: 260
    10-25-2019, 09:50 AM Go to last post
  5. 2 cascaded push pull

    Started by tepsamps, 10-22-2019 11:12 PM
    • Replies: 8
    • Views: 262
    10-24-2019, 04:34 AM Go to last post
  6. Doofus-Proofing Bias Supply

    Started by Justin Thomas, 10-11-2019 08:21 PM
    • Replies: 21
    • Views: 530
    10-22-2019, 10:02 PM Go to last post
  7. Swap out different Preamp Tube Type ?

    Started by HaroldBrooks, 09-26-2019 05:18 AM
    • Replies: 21
    • Views: 744
    10-22-2019, 05:14 PM Go to last post
  8. I want to build an amp selector (two amps a/b, one cab)

    Started by Gtr0, 10-05-2019 08:52 AM
    2 Pages
    1 2
    • Replies: 59
    • Views: 1,356
    10-21-2019, 05:34 AM Go to last post
  9. Weber 5F2H High power Princeton questions

    Started by garytube, 10-20-2019 06:29 PM
    • Replies: 2
    • Views: 134
    10-20-2019, 08:42 PM Go to last post
  10. Generic voltage divider question...

    Started by Gtr0, 10-17-2019 06:31 PM
    • Replies: 8
    • Views: 275
    10-18-2019, 03:18 PM Go to last post
  11. DC at both tone controls ?

    Started by HaroldBrooks, 10-13-2019 08:32 AM
    • Replies: 13
    • Views: 420
    10-15-2019, 02:17 AM Go to last post
  12. Current Ratings for amp and Power Transformers

    Started by Gtr0, 10-09-2019 09:30 AM
    • Replies: 20
    • Views: 536
    10-13-2019, 11:44 PM Go to last post
    • Replies: 27
    • Views: 645
    10-10-2019, 12:20 AM Go to last post
  13. Switchable Global NFB options

    Started by Gtr0, 10-04-2019 05:24 AM
    • Replies: 10
    • Views: 379
    10-06-2019, 11:55 AM Go to last post
  14. Fender 68 prri

    Started by clintronics, 09-19-2019 03:27 AM
    • Replies: 7
    • Views: 449
    09-30-2019, 05:08 PM Go to last post
    • Replies: 12
    • Views: 594
    09-29-2019, 07:45 AM Go to last post
  15. neg grid voltage limit

    Started by uneumann, 09-21-2019 10:21 PM
    • Replies: 7
    • Views: 391
    09-23-2019, 07:59 PM Go to last post
    • Replies: 15
    • Views: 713
    09-17-2019, 06:43 PM Go to last post
  16. Question Gain stage bypass - query

    Started by NoelW, 09-11-2019 04:22 AM
    • Replies: 18
    • Views: 607
    09-14-2019, 05:17 AM Go to last post
  17. Hiwatt dr201 PT

    Started by tepsamps, 09-08-2019 10:55 AM
    • Replies: 10
    • Views: 468
    09-13-2019, 05:28 PM Go to last post
  18. Physically determine speaker wattage?

    Started by Axtman, 09-10-2019 07:00 AM
    • Replies: 15
    • Views: 552
    09-13-2019, 03:58 PM Go to last post

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