Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 05:21:36 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 05:21:36 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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| 0 Members and 60 Guests are viewing this board. | ||||
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Crate Stealth 50 power issue
Started by navdave |
6 Replies
2617 Views |
July 20, 2022, 12:28:31 amby navdave |
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Rob Robinette's bias calculator
Started by dude |
14 Replies
4699 Views |
July 19, 2022, 09:03:35 pm by PRR |
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Negative Feedback Causing Oscillation?
Started by AHeck |
19 Replies
5646 Views |
July 18, 2022, 07:16:19 am by AHeck |
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Coupling caps 400v
Started by joesatch |
24 Replies
5676 Views |
July 17, 2022, 05:01:28 pm by sluckey |
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Speaker for 5E3 Kit?
Started by bbmade |
11 Replies
3289 Views |
July 17, 2022, 04:18:44 am by JB |
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18 Replies
4371 Views |
July 17, 2022, 02:41:57 am by kagliostro |
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Examples of high voltage relay
Started by CascoSieg |
5 Replies
2329 Views |
July 16, 2022, 08:03:38 pm by DummyLoad |
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Dual 50 Amp
Started by Big_Mike |
6 Replies
2795 Views |
July 16, 2022, 05:16:11 pm by Apexelectric |
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Supro 1688TN Power Section
Started by Vez |
12 Replies
3431 Views |
July 15, 2022, 08:17:38 pm by bmccowan |
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IEC connector location
Started by MrBreeze |
4 Replies
2190 Views |
July 15, 2022, 01:29:37 pm by MrBreeze |
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Chassis Material preferences
Started by MrBreeze |
11 Replies
3094 Views |
July 15, 2022, 07:13:17 am by sluckey |
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29 Replies
6507 Views |
July 14, 2022, 03:54:58 pm by HotBluePlates |
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Electronics theory question
Started by nandrewjackson |
9 Replies
3589 Views |
July 14, 2022, 04:09:28 am by shooter |
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59 Replies
16416 Views |
July 13, 2022, 05:59:25 pm by cspar |
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preamp cathodes to ground location
Started by joesatch |
3 Replies
2152 Views |
July 13, 2022, 04:45:49 pm by tubeswell |
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Average Screen Current
Started by HotBluePlates |
17 Replies
6679 Views |
July 13, 2022, 08:53:34 am by DuaneOh |
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Where to insert Standby Switch?
Started by winterturtle |
4 Replies
2773 Views |
July 12, 2022, 04:34:31 pm by winterturtle |
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31 Replies
6364 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
1831 Views |
July 11, 2022, 07:46:46 pm by sluckey |
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8 Replies
3557 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
2514 Views |
July 11, 2022, 11:34:59 am by PRR |
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Schematic question
Started by Vil |
7 Replies
2533 Views |
July 11, 2022, 09:45:18 am by sluckey |
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Sluckey matchless board
Started by ok_state_blues |
4 Replies
2394 Views |
July 10, 2022, 05:03:30 pm by ok_state_blues |
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Blackstar HT-20R
Started by EL34 |
8 Replies
3948 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
3053 Views |
July 10, 2022, 06:04:35 am by ShoemanGB |
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3 Replies
2266 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
3114 Views |
July 08, 2022, 11:38:14 pm by PRR |
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12vdc heaters elevated?
Started by joesatch |
12 Replies
3427 Views |
July 08, 2022, 02:56:51 pm by PRR |
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3 Replies
2305 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
2133 Views |
July 08, 2022, 12:48:04 pm by reginom72 |
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5 Replies
2531 Views |
July 08, 2022, 12:42:56 am by kagliostro |
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Ampeg Gemini 1 OT identification
Started by ndross475 |
2 Replies
2001 Views |
July 07, 2022, 04:09:28 pm by sluckey |
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diodes/rectifier switch
Started by isaac_teller |
8 Replies
2782 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
2304 Views |
July 05, 2022, 06:48:13 pm by kristianf |
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Bias circuit question.
Started by joesatch |
4 Replies
2361 Views |
July 05, 2022, 05:46:19 pm by nandrewjackson |
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20 Replies
4820 Views |
July 05, 2022, 07:09:00 am by pdf64 |
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AMPEG B15 issue
Started by Colas LeGrippa |
4 Replies
2318 Views |
July 04, 2022, 07:24:50 pm by SoundmasterG |
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ECC83 issue, high voltage output
Started by hozone |
6 Replies
2550 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
2226 Views |
July 04, 2022, 01:51:35 am by DummyLoad |
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Deluxe Reverb standby switch
Started by Lectroid |
16 Replies
5370 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
2444 Views |
July 03, 2022, 07:00:11 pm by dwinstonwood |
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Installing a choke??
Started by Lectroid |
17 Replies
4049 Views |
July 03, 2022, 12:07:16 pm by Lectroid |
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Standalone preamp question.
Started by dragonbat13 |
2 Replies
1990 Views |
July 03, 2022, 08:56:45 am by tmknight |
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2 Replies
2519 Views |
July 03, 2022, 08:43:45 am by pdf64 |
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pedal pcb cap polarity markings
Started by joesatch |
8 Replies
2884 Views |
July 02, 2022, 11:14:41 am by kagliostro |
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purple wire Antek PT
Started by joesatch |
2 Replies
2158 Views |
July 01, 2022, 07:39:56 pm by ok_state_blues |
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Choke specifications
Started by acheld |
9 Replies
3589 Views |
June 30, 2022, 05:40:30 pm by mresistor |
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2 Replies
2088 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
2054 Views |
June 30, 2022, 07:37:00 am by Swampertech |
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Blue illuminated rocker switch source?
Started by joesatch |
11 Replies
3390 Views |
June 29, 2022, 02:24:41 pm by PRR |
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