Welcome To the Hoffman Amplifiers Forum
July 14, 2026, 08:29:34 am
Welcome To the Hoffman Amplifiers ForumJuly 14, 2026, 08:29:34 am | ||
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| Willabe and 72 Guests are viewing this board. | ||||
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12AT7 VS 12AX7 in PI
Started by 67polara |
10 Replies
10805 Views |
January 18, 2011, 07:58:42 amby HotBluePlates |
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2 Replies
4492 Views |
January 18, 2011, 07:58:17 am by fiftynine |
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4 Replies
5264 Views |
January 17, 2011, 08:46:31 pm by Fresh_Start |
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Diode Substitution?
Started by samato |
2 Replies
4506 Views |
January 17, 2011, 05:35:56 pm by samato |
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Power Scaling in General
Started by fiftynine |
6 Replies
5955 Views |
January 17, 2011, 05:16:15 pm by fiftynine |
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28 Replies
16887 Views |
January 17, 2011, 03:57:28 pm by phsyconoodler |
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5 Replies
5446 Views |
January 17, 2011, 12:10:02 pm by FYL |
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7 Replies
5402 Views |
January 17, 2011, 03:57:31 am by kagliostro |
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Parallel resister math
Started by Tone Junkie |
8 Replies
6152 Views |
January 17, 2011, 01:03:16 am by Tone Junkie |
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Elroy Jetson's Geetar Amp?
Started by DummyLoad |
2 Replies
5365 Views |
January 15, 2011, 12:15:44 am by DummyLoad |
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Pin 1 on EL34/kt77 Grounded?
Started by 67polara |
5 Replies
7182 Views |
January 14, 2011, 06:39:45 pm by FYL |
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My old Heath 2-12 combo
Started by phsyconoodler |
2 Replies
4360 Views |
January 14, 2011, 10:46:55 am by Platefire |
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9 Replies
8662 Views |
January 14, 2011, 10:13:47 am by Willabe |
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Valve universal wiring
Started by FYL |
4 Replies
5178 Views |
January 14, 2011, 07:03:27 am by stingray_65 |
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screen/grid resistor
Started by jeff |
1 Replies
4371 Views |
January 13, 2011, 10:10:52 pm by sluckey |
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6 Replies
6630 Views |
January 13, 2011, 06:10:42 pm by FYL |
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8 Replies
7182 Views |
January 13, 2011, 05:45:11 pm by DummyLoad |
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Circuit Board/Baffle Board Rattle?
Started by heymymy |
3 Replies
5346 Views |
January 13, 2011, 12:10:26 pm by phsyconoodler |
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350ka pot w/ 70% tap
Started by punkykatt |
3 Replies
4889 Views |
January 13, 2011, 10:45:23 am by punkykatt |
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Sovtek Mig-50
Started by Leevi |
5 Replies
9633 Views |
January 13, 2011, 10:28:22 am by plexi50 |
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6G15 Input Question (FX loop operation)
Started by Dave |
10 Replies
7673 Views |
January 13, 2011, 08:14:59 am by Dave |
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Vacuum Tube base glue
Started by Tiny_Daddy |
8 Replies
10331 Views |
January 13, 2011, 07:58:19 am by supro66 |
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Are these the same?
Started by tubenit |
15 Replies
10490 Views |
January 13, 2011, 01:40:39 am by J Rindt |
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Champ idea/question 6v6/6l6
Started by Madison |
2 Replies
4784 Views |
January 12, 2011, 10:27:31 pm by Madison |
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SS Power Transformers?
Started by plexi50 |
7 Replies
5570 Views |
January 12, 2011, 10:25:54 pm by plexi50 |
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Flot-A-Tone Spy amp mysteries
Started by Packerswin14 |
8 Replies
7557 Views |
January 12, 2011, 09:14:17 pm by PRR |
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Noise in Stout
Started by Walrus |
8 Replies
6033 Views |
January 12, 2011, 08:03:31 pm by Walrus |
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Climax... Trainwreck...??
Started by crashtm1 |
2 Replies
5858 Views |
January 12, 2011, 06:07:19 pm by crashtm1 |
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Filter cap replacement values
Started by pbman1953 |
5 Replies
6272 Views |
January 12, 2011, 03:50:32 pm by pbman1953 |
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1 tube reverb and the TOS
Started by 67polara |
4 Replies
4866 Views |
January 12, 2011, 11:55:00 am by tubenit |
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Bias voltage
Started by jeff |
7 Replies
6803 Views |
January 11, 2011, 09:52:41 pm by stingray_65 |
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Am I Crazy? About Bias Resistors
Started by heymymy |
17 Replies
8495 Views |
January 11, 2011, 06:04:54 pm by sluckey |
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AC hum really bad
Started by 67polara |
4 Replies
4866 Views |
January 11, 2011, 03:32:38 pm by plexi50 |
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6CA7 verse's EL34
Started by Jack1962 |
2 Replies
4858 Views |
January 11, 2011, 01:32:01 pm by Willabe |
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5 Replies
5206 Views |
January 11, 2011, 12:05:12 pm by dynaman1 |
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1 Replies
4249 Views |
January 11, 2011, 10:16:04 am by jjasilli |
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How not to build an amplifier
Started by kagliostro |
8 Replies
6246 Views |
January 11, 2011, 08:14:50 am by kagliostro |
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AB763 Deluxe scratch build
Started by Craw |
14 Replies
11931 Views |
January 10, 2011, 11:30:23 pm by Craw |
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Transformer Re-Winding
Started by bigsbybender |
18 Replies
11337 Views |
January 10, 2011, 08:11:33 pm by bigsbybender |
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0 Replies
5081 Views |
January 10, 2011, 07:35:49 pm by plexi50 |
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2 Replies
4234 Views |
January 10, 2011, 01:59:59 pm by simonallaway |
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High voltages in 66 Ampeg B15nf
Started by mosrite1 |
3 Replies
5386 Views |
January 09, 2011, 09:31:51 pm by PRR |
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Small problem with my kinda TOS
Started by 67polara |
24 Replies
10229 Views |
January 09, 2011, 08:10:56 pm by 67polara |
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Heater Layout
Started by 3choplex |
12 Replies
8173 Views |
January 09, 2011, 05:26:40 pm by andrew_k |
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Anemic Fender RI Reverb
Started by chuggy |
3 Replies
4537 Views |
January 09, 2011, 10:51:33 am by sluckey |
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How to wire heaters with 12.6volt
Started by Tone Junkie |
9 Replies
14024 Views |
January 08, 2011, 10:38:26 pm by RicharD |
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KT88's In a Plexi 50
Started by shortfuse |
1 Replies
4807 Views |
January 08, 2011, 07:59:24 pm by shortfuse |
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Merlin's 2nd book - Power Supplies
Started by tubeswell |
22 Replies
11062 Views |
January 08, 2011, 03:24:47 pm by archaos |
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Geezer's Little Wing Questions
Started by ncusack |
15 Replies
11065 Views |
January 08, 2011, 08:17:18 am by ncusack |
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6 Replies
8719 Views |
January 08, 2011, 03:30:51 am by kagliostro |
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