Welcome To the Hoffman Amplifiers Forum
December 08, 2025, 12:18:13 pm
Welcome To the Hoffman Amplifiers ForumDecember 08, 2025, 12:18:13 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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Average Screen Current
Started by HotBluePlates |
17 Replies
7391 Views |
July 13, 2022, 08:53:34 amby DuaneOh |
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Where to insert Standby Switch?
Started by winterturtle |
4 Replies
3115 Views |
July 12, 2022, 04:34:31 pm by winterturtle |
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31 Replies
7104 Views |
July 12, 2022, 07:04:44 am by winterturtle |
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Eliminating RobRob's Hum balance ckt.
Started by JustMike |
1 Replies
2037 Views |
July 11, 2022, 07:46:46 pm by sluckey |
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8 Replies
3957 Views |
July 11, 2022, 02:45:18 pm by HotBluePlates |
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1965 Kay 703C - OT replacement questions
Started by Carlsoti |
6 Replies
2768 Views |
July 11, 2022, 11:34:59 am by PRR |
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Schematic question
Started by Vil |
7 Replies
2747 Views |
July 11, 2022, 09:45:18 am by sluckey |
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Sluckey matchless board
Started by ok_state_blues |
4 Replies
2636 Views |
July 10, 2022, 05:03:30 pm by ok_state_blues |
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Blackstar HT-20R
Started by EL34 |
8 Replies
4254 Views |
July 10, 2022, 12:35:50 pm by rake |
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Gibson GA-5 build - good till 9.5
Started by Keyboy |
5 Replies
3378 Views |
July 10, 2022, 06:04:35 am by ShoemanGB |
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3 Replies
2512 Views |
July 09, 2022, 11:19:23 am by sluckey |
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Using an External Cab for Fender '68 Custom Vibro Champ Reverb
Started by reginom72 |
4 Replies
3452 Views |
July 08, 2022, 11:38:14 pm by PRR |
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12vdc heaters elevated?
Started by joesatch |
12 Replies
3733 Views |
July 08, 2022, 02:56:51 pm by PRR |
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3 Replies
2544 Views |
July 08, 2022, 02:53:50 pm by PRR |
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1974 Fender Twin Reverb (Master Volume) Circuit Question
Started by reginom72 |
0 Replies
2403 Views |
July 08, 2022, 12:48:04 pm by reginom72 |
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5 Replies
2848 Views |
July 08, 2022, 12:42:56 am by kagliostro |
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Ampeg Gemini 1 OT identification
Started by ndross475 |
2 Replies
2228 Views |
July 07, 2022, 04:09:28 pm by sluckey |
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diodes/rectifier switch
Started by isaac_teller |
8 Replies
3155 Views |
July 07, 2022, 12:32:40 pm by isaac_teller |
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Vox AC15H1TV - Hum and channel bleed
Started by kristianf |
0 Replies
2486 Views |
July 05, 2022, 06:48:13 pm by kristianf |
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Bias circuit question.
Started by joesatch |
4 Replies
2622 Views |
July 05, 2022, 05:46:19 pm by nandrewjackson |
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20 Replies
5492 Views |
July 05, 2022, 07:09:00 am by pdf64 |
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AMPEG B15 issue
Started by Colas LeGrippa |
4 Replies
2591 Views |
July 04, 2022, 07:24:50 pm by SoundmasterG |
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ECC83 issue, high voltage output
Started by hozone |
6 Replies
2844 Views |
July 04, 2022, 01:26:03 pm by hozone |
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6JB5 Build Docs for isaac_teller
Started by DummyLoad |
3 Replies
2522 Views |
July 04, 2022, 01:51:35 am by DummyLoad |
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Deluxe Reverb standby switch
Started by Lectroid |
16 Replies
6014 Views |
July 03, 2022, 09:40:47 pm by thetragichero |
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Vampower Mk 1 100 watt head
Started by dwinstonwood |
0 Replies
2702 Views |
July 03, 2022, 07:00:11 pm by dwinstonwood |
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Installing a choke??
Started by Lectroid |
17 Replies
4551 Views |
July 03, 2022, 12:07:16 pm by Lectroid |
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Standalone preamp question.
Started by dragonbat13 |
2 Replies
2295 Views |
July 03, 2022, 08:56:45 am by tmknight |
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2 Replies
2871 Views |
July 03, 2022, 08:43:45 am by pdf64 |
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pedal pcb cap polarity markings
Started by joesatch |
8 Replies
3323 Views |
July 02, 2022, 11:14:41 am by kagliostro |
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purple wire Antek PT
Started by joesatch |
2 Replies
2423 Views |
July 01, 2022, 07:39:56 pm by ok_state_blues |
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Choke specifications
Started by acheld |
9 Replies
4054 Views |
June 30, 2022, 05:40:30 pm by mresistor |
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2 Replies
2413 Views |
June 30, 2022, 01:56:14 pm by rundgrenrules |
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4-band EQ for 763 type circuit
Started by Swampertech |
0 Replies
2422 Views |
June 30, 2022, 07:37:00 am by Swampertech |
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Blue illuminated rocker switch source?
Started by joesatch |
11 Replies
3786 Views |
June 29, 2022, 02:24:41 pm by PRR |
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VOX AC30 Power Lamp Flickering
Started by dpm309 |
3 Replies
2338 Views |
June 29, 2022, 07:44:00 am by dwinstonwood |
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Vibrato sound on a non-vibrato amp?
Started by DuaneOh |
12 Replies
4002 Views |
June 28, 2022, 09:19:20 am by Lectroid |
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8 Replies
3495 Views |
June 26, 2022, 10:40:19 am by kagliostro |
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16 Replies
5034 Views |
June 25, 2022, 03:18:17 pm by bbmade |
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New Build 6v6 Tweed Twin HP
Started by JGk |
2 Replies
2159 Views |
June 24, 2022, 10:31:39 am by uki |
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85 Replies
16307 Views |
June 24, 2022, 06:57:01 am by Eythor |
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6 Replies
3648 Views |
June 23, 2022, 03:33:02 pm by smilan |
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10 Replies
4344 Views |
June 23, 2022, 12:17:28 pm by tubeswell |
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output transformer compatibility
Started by j_bruce |
3 Replies
2325 Views |
June 23, 2022, 11:37:00 am by HotBluePlates |
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NFB tap question
Started by joesatch |
1 Replies
2198 Views |
June 23, 2022, 09:05:16 am by sluckey |
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Old Ampro PP 6v6 center tap question
Started by goldstache |
10 Replies
3044 Views |
June 22, 2022, 11:53:51 pm by tubeswell |
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3 Replies
3023 Views |
June 22, 2022, 03:08:28 pm by Latole |
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4 Replies
3633 Views |
June 22, 2022, 04:49:53 am by nemoi |
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one-knob tone stack
Started by burt_toast |
12 Replies
7298 Views |
June 21, 2022, 11:45:44 pm by thetragichero |
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10 Replies
4728 Views |
June 21, 2022, 04:06:11 pm by nandrewjackson |
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