Welcome To the Hoffman Amplifiers Forum
April 25, 2026, 09:06:29 pm
Welcome To the Hoffman Amplifiers ForumApril 25, 2026, 09:06:29 pm | ||
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| W5FH and 31 Guests are viewing this board. | ||||
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Mesa mark V 90 shenanigans
Started by nandrewjackson |
2 Replies
3849 Views |
August 12, 2023, 12:10:31 amby nandrewjackson |
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question for Sluckey
Started by labb |
2 Replies
3801 Views |
August 11, 2023, 08:31:03 pm by labb |
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Cathode resistor measuring odd
Started by jordan86 |
6 Replies
4601 Views |
August 11, 2023, 12:03:41 pm by tubeswell |
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Back in the saddle
Started by Nathan |
3 Replies
3430 Views |
August 11, 2023, 09:30:19 am by Nathan |
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6 Replies
4303 Views |
August 11, 2023, 07:46:28 am by Planobilly |
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300 - 500 ohm speakers
Started by Peter212 |
4 Replies
4888 Views |
August 10, 2023, 08:53:28 pm by PRR |
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Is this Power Section odd or not ??
Started by kagliostro |
3 Replies
3786 Views |
August 10, 2023, 07:28:33 pm by kagliostro |
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Soaring DC on power tubes
Started by Choan |
5 Replies
4222 Views |
August 10, 2023, 03:27:52 pm by tubeswell |
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Marshall PA Amp's in for servicing...
Started by TubeGeek |
8 Replies
7570 Views |
August 10, 2023, 02:58:52 pm by sluckey |
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2553 PT position
Started by Leevi |
8 Replies
4392 Views |
August 10, 2023, 02:26:36 pm by kagliostro |
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An old (complex) project being reactivated
Started by Dave |
11 Replies
5216 Views |
August 10, 2023, 10:28:33 am by acheld |
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Acoustic 370 Updates
Started by pbman1953 |
0 Replies
3284 Views |
August 09, 2023, 07:51:43 am by pbman1953 |
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Wiring in output transformer in jtm45
Started by timmyjoe |
5 Replies
4690 Views |
August 09, 2023, 04:33:37 am by pdf64 |
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1964 Fender Spring Reverb Unit 6G15
Started by Yeatzee |
17 Replies
8595 Views |
August 09, 2023, 03:33:33 am by Latole |
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20 gauge cloth wire
Started by timmyjoe |
1 Replies
3575 Views |
August 09, 2023, 12:28:24 am by PRR |
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2 Replies
4185 Views |
August 08, 2023, 09:40:30 pm by Planobilly |
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1 Replies
3493 Views |
August 08, 2023, 03:34:18 pm by sluckey |
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4 Replies
3951 Views |
August 08, 2023, 11:27:23 am by zephyrblau |
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Choke for 5f6a build
Started by Mypalmurph |
2 Replies
3735 Views |
August 08, 2023, 10:52:22 am by Mypalmurph |
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Reverb transformer grounding
Started by marshallguy |
5 Replies
4784 Views |
August 08, 2023, 05:55:13 am by marshallguy |
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Measuring V+(plate voltage)
Started by Champ_49 |
9 Replies
5199 Views |
August 08, 2023, 03:52:34 am by shooter |
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11 Replies
5407 Views |
August 07, 2023, 07:43:14 pm by sluckey |
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15 Replies
7879 Views |
August 07, 2023, 05:20:33 pm by mmack |
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EL34 vs 6L6 bias supply
Started by fossilshark |
2 Replies
4253 Views |
August 07, 2023, 02:39:11 pm by PRR |
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5e3 circuit with 500k pots?
Started by roseblood11 |
7 Replies
5314 Views |
August 07, 2023, 08:21:15 am by roseblood11 |
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SVT with a 600 Ohm input
Started by pbman1953 |
4 Replies
4315 Views |
August 05, 2023, 05:10:09 pm by pbman1953 |
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Attention Visio users!
Started by sluckey |
1 Replies
3544 Views |
August 05, 2023, 03:41:21 pm by kagliostro |
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Grounding schemes
Started by marshallguy |
2 Replies
3632 Views |
August 05, 2023, 01:50:58 pm by marshallguy |
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Amp startup issues - light bulb glowing
Started by jordan86 |
15 Replies
6621 Views |
August 05, 2023, 10:52:01 am by jordan86 |
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'68 AB763 Showman tremolo tick
Started by Esquirefreak |
0 Replies
3444 Views |
August 05, 2023, 08:17:01 am by Esquirefreak |
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Tremodrive Oscillator question
Started by TurboGuitarMelton |
5 Replies
5098 Views |
August 04, 2023, 11:54:44 pm by PRR |
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power supply bias design
Started by fossilshark |
4 Replies
4041 Views |
August 04, 2023, 11:03:01 pm by fossilshark |
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Mosfet reverb recovery
Started by Bieworm |
14 Replies
6494 Views |
August 04, 2023, 04:08:30 pm by PRR |
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9 Replies
5082 Views |
August 04, 2023, 01:14:50 pm by marshallguy |
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Multi amp switcher thing
Started by fossilshark |
9 Replies
5212 Views |
August 04, 2023, 01:12:53 pm by fossilshark |
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Alembic F-2B To Line Level Out
Started by AHeck |
7 Replies
4867 Views |
August 03, 2023, 09:37:27 pm by AHeck |
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FX series Loop design
Started by marshallguy |
11 Replies
5855 Views |
August 03, 2023, 09:23:04 pm by sluckey |
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21 Replies
7253 Views |
August 03, 2023, 07:24:38 pm by marshallguy |
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Presense and Resonance
Started by jim |
0 Replies
3139 Views |
August 03, 2023, 09:14:27 am by jim |
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Big problem with deluxe reverb 65
Started by Travis8 |
16 Replies
5555 Views |
August 03, 2023, 06:19:56 am by Latole |
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Using octal tube for a 'one tube' reverb
Started by smackoj |
40 Replies
14047 Views |
August 02, 2023, 06:08:38 pm by Jerry garrcia |
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Variac tested
Started by Colas LeGrippa |
16 Replies
6416 Views |
August 02, 2023, 04:16:31 pm by Colas LeGrippa |
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Two heater circuits - grounding both?
Started by cfortner |
2 Replies
3449 Views |
August 02, 2023, 09:12:13 am by cfortner |
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Restoring Old Power Transformer
Started by TurboGuitarMelton |
10 Replies
6756 Views |
August 02, 2023, 08:29:50 am by kagliostro |
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5 Replies
5123 Views |
August 01, 2023, 05:41:59 pm by sluckey |
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filament wiring
Started by labb |
3 Replies
3855 Views |
August 01, 2023, 04:48:29 pm by sluckey |
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3 Replies
4294 Views |
August 01, 2023, 02:09:44 pm by kagliostro |
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Super reverb clone
Started by Rockranger |
10 Replies
5332 Views |
August 01, 2023, 02:23:46 am by Rockranger |
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3 Replies
4285 Views |
July 31, 2023, 04:11:04 pm by HotBluePlates |
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TMB Stout with 6v6's
Started by Rixster909 |
0 Replies
3528 Views |
July 31, 2023, 02:06:21 am by Rixster909 |
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