Welcome To the Hoffman Amplifiers Forum
January 24, 2026, 08:54:17 pm
Welcome To the Hoffman Amplifiers ForumJanuary 24, 2026, 08:54:17 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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| rafe and 41 Guests are viewing this board. | ||||
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GA-40 RC network - what's the point??
Started by LooseChange |
9 Replies
5235 Views |
July 18, 2010, 10:09:18 pmby PRR |
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Reduce beating in bias vary tremolos
Started by bnwitt |
4 Replies
4076 Views |
July 18, 2010, 05:17:53 pm by bnwitt |
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11 Replies
10584 Views |
July 17, 2010, 10:13:32 pm by tubeswell |
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18 Replies
13269 Views |
July 17, 2010, 06:33:38 pm by jojokeo |
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NASTY PRINCETON
Started by TIMBO |
6 Replies
4756 Views |
July 17, 2010, 05:27:53 pm by TIMBO |
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1/50 NP capacitor question
Started by Bub |
3 Replies
6158 Views |
July 17, 2010, 02:10:00 pm by Tiny_Daddy |
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Oddball Marshall 2046 Specialist
Started by Rev D |
0 Replies
4434 Views |
July 16, 2010, 03:43:12 pm by Rev D |
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Hi - Low Vol switch ?
Started by tubenit |
20 Replies
8638 Views |
July 16, 2010, 10:28:23 am by jjasilli |
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4 Replies
4802 Views |
July 15, 2010, 09:14:03 pm by tubesornothing |
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21 Replies
13035 Views |
July 15, 2010, 08:36:57 pm by LooseChange |
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move relay ft. switch jack
Started by tubenit |
6 Replies
4551 Views |
July 15, 2010, 03:53:13 pm by DummyLoad |
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3 Replies
4063 Views |
July 15, 2010, 07:56:31 am by sluckey |
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Marshall Major phase inverter
Started by navdave |
4 Replies
4907 Views |
July 15, 2010, 04:22:29 am by Ritchie200 |
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6 Replies
5218 Views |
July 15, 2010, 02:20:00 am by Rev D |
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Dual pentode/triode tubes in preamp?
Started by Fresh_Start |
7 Replies
7109 Views |
July 15, 2010, 12:57:24 am by bigdaddy |
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Tremolo troubles ab763 new build
Started by Tone Junkie |
9 Replies
5382 Views |
July 15, 2010, 12:03:56 am by Tone Junkie |
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Killer ant mod
Started by bigdaddy |
3 Replies
6818 Views |
July 14, 2010, 11:13:24 pm by bigdaddy |
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Help with negative bias voltage
Started by J Rindt |
5 Replies
6413 Views |
July 14, 2010, 05:10:50 pm by sluckey |
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What's this filter??
Started by Geezer |
7 Replies
4684 Views |
July 14, 2010, 04:48:16 pm by FYL |
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3 Replies
3501 Views |
July 14, 2010, 07:22:36 am by nateflanigan |
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Replacing PT in Princeton (AA1164)
Started by dude |
3 Replies
3639 Views |
July 13, 2010, 03:48:39 pm by Fresh_Start |
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reverb issues ab763 circuit new build
Started by Tone Junkie |
3 Replies
3528 Views |
July 13, 2010, 02:52:52 pm by sluckey |
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changing PI bias
Started by phsyconoodler |
6 Replies
5365 Views |
July 13, 2010, 12:36:07 pm by phsyconoodler |
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12V heater to raise B+?
Started by birt |
10 Replies
5948 Views |
July 13, 2010, 12:34:54 pm by gar13 |
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JCM800 clone 6550R high freq. squeal
Started by mamps |
4 Replies
3935 Views |
July 13, 2010, 10:33:40 am by mamps |
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12 Replies
7750 Views |
July 13, 2010, 12:10:14 am by Tone Junkie |
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AB763 Deluxe Reverb with 6v6
Started by moonbird |
9 Replies
6623 Views |
July 12, 2010, 07:47:02 pm by sluckey |
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Single channel AB763 design question?
Started by markmalin |
11 Replies
7571 Views |
July 12, 2010, 07:21:11 pm by markmalin |
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Smokin' PT
Started by bluestone |
22 Replies
7939 Views |
July 11, 2010, 07:23:31 pm by bluestone |
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Fixing Noise
Started by rafe |
2 Replies
3203 Views |
July 11, 2010, 01:30:44 am by rafe |
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5 Replies
4530 Views |
July 10, 2010, 07:14:28 pm by kagliostro |
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12 Replies
6713 Views |
July 10, 2010, 11:52:19 am by toomanyslurpees |
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Bogen CHB-35A PA amp
Started by punkykatt |
8 Replies
6584 Views |
July 09, 2010, 06:40:26 pm by dwp |
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2 Replies
5483 Views |
July 09, 2010, 08:46:58 am by kagliostro |
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Need help tracking down a "buzz"
Started by markmalin |
22 Replies
10299 Views |
July 09, 2010, 08:14:25 am by markmalin |
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Mstr vol pot value?
Started by tubenit |
5 Replies
4936 Views |
July 08, 2010, 02:36:24 pm by jojokeo |
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Fender AB763 onboard reverb too trebley
Started by flora |
9 Replies
6602 Views |
July 08, 2010, 10:32:16 am by phsyconoodler |
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2204 or Hot Switch
Started by macula56 |
3 Replies
3684 Views |
July 08, 2010, 09:02:58 am by rzenc |
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3 Replies
5148 Views |
July 08, 2010, 09:00:31 am by macula56 |
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Tonal Difference anyone? Choke types
Started by dwp |
4 Replies
5512 Views |
July 08, 2010, 07:16:35 am by FYL |
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MOVED: My time for building is over....
Started by tubenit |
0 Replies
3576 Views |
July 07, 2010, 07:19:17 pm by tubenit |
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1970's JMP50 PT voltage??
Started by bnwitt |
4 Replies
4057 Views |
July 06, 2010, 04:00:45 pm by bnwitt |
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Hammond M100 Ao29 on the bench
Started by LooseChange |
5 Replies
6737 Views |
July 06, 2010, 09:12:20 am by FYL |
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Marshall style PT with 7V heater winding...
Started by bruno |
16 Replies
8313 Views |
July 06, 2010, 07:00:18 am by sluckey |
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7 Replies
6346 Views |
July 06, 2010, 06:47:11 am by FYL |
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Need help identifying these Pots!
Started by Platefire |
13 Replies
6398 Views |
July 05, 2010, 10:58:47 pm by Platefire |
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'75 Deluxe Reverb Overhaul Advice Needed
Started by Wilks |
7 Replies
5301 Views |
July 05, 2010, 12:42:10 pm by pullshocks |
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Need Marshall schem and/or bit of info
Started by dynaman1 |
2 Replies
3266 Views |
July 05, 2010, 12:26:08 pm by dynaman1 |
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JCM 900 tone opinions and known mods
Started by bnwitt |
7 Replies
5770 Views |
July 05, 2010, 10:57:23 am by tubenit |
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Blues Jr. Upgrade secrets
Started by Tiny_Daddy |
7 Replies
6581 Views |
July 04, 2010, 09:19:16 pm by bigdaddy |
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