Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 12:16:09 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 12:16:09 pm | ||
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19 Replies
2284 Views |
September 01, 2025, 01:25:45 amby Grantorino |
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What is this, a local NFB ??
Started by kagliostro |
4 Replies
1021 Views |
August 31, 2025, 10:40:26 am by kagliostro |
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18 Replies
2891 Views |
August 30, 2025, 08:26:31 pm by TIMBO |
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Resistor identification
Started by 1Ab |
21 Replies
3115 Views |
August 30, 2025, 01:30:46 pm by 1Ab |
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5 Replies
1458 Views |
August 29, 2025, 10:20:06 pm by stratomaster |
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Cathodyne bias problem
Started by scstill |
2 Replies
911 Views |
August 28, 2025, 05:04:06 pm by scstill |
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15 Replies
2117 Views |
August 28, 2025, 09:41:21 am by Willabe |
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20 Replies
4747 Views |
August 28, 2025, 03:33:36 am by tubeswell |
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22 Replies
2249 Views |
August 27, 2025, 01:24:10 pm by Platefire |
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HR DeVille number two.
Started by Bluebark |
20 Replies
2350 Views |
August 27, 2025, 09:11:53 am by Bluebark |
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Sound City 120 is in a bad way
Started by Williamblake |
49 Replies
14571 Views |
August 26, 2025, 02:56:11 pm by Williamblake |
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12AZ7 as DC Cathode Follower?
Started by dwinstonwood |
3 Replies
842 Views |
August 26, 2025, 11:32:16 am by tubeswell |
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Fender Bassman AC568 issue
Started by retrorod |
8 Replies
1255 Views |
August 26, 2025, 05:54:29 am by retrorod |
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Mic Preamp Power Supply Questions
Started by Jonas |
6 Replies
1310 Views |
August 25, 2025, 06:58:50 pm by Jonas |
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33 Replies
13152 Views |
August 25, 2025, 04:42:10 pm by tubeswell |
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Bugera 333XL-212 power amp stage problem
Started by Carlito |
6 Replies
1377 Views |
August 25, 2025, 09:59:29 am by scstill |
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Stand-Alone 5V/3A Filament TX W/CT
Started by dwinstonwood |
4 Replies
914 Views |
August 22, 2025, 02:04:10 pm by dwinstonwood |
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19 Replies
2309 Views |
August 21, 2025, 06:00:30 pm by wsscott |
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8 Replies
1344 Views |
August 21, 2025, 04:36:49 pm by Merlin |
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So I tried the Hybrid Tube/SS rectifier...
Started by Nathan |
4 Replies
1042 Views |
August 20, 2025, 09:58:43 am by Nathan |
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4 Replies
909 Views |
August 20, 2025, 05:11:11 am by HotBluePlates |
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Bias high voltage on HR Deville
Started by Bluebark |
8 Replies
1115 Views |
August 19, 2025, 12:14:44 pm by shooter |
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Vvr and bias switching
Started by Mike-p |
6 Replies
1043 Views |
August 18, 2025, 05:48:05 pm by Mike-p |
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"popping" Fender Twin Amp '57
Started by Sansteeth |
16 Replies
2906 Views |
August 18, 2025, 07:23:05 am by Sansteeth |
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70's Italian amp "Sound Big 10" schematic?
Started by JvR |
19 Replies
4941 Views |
August 16, 2025, 12:31:03 am by isaac_teller |
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APD-8025H Color Codes
Started by Richs1979 |
8 Replies
1415 Views |
August 15, 2025, 09:15:48 pm by Richs1979 |
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12 Replies
1762 Views |
August 15, 2025, 04:19:55 pm by DummyLoad |
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New Hoffman Plexi build
Started by Richs1979 |
4 Replies
994 Views |
August 12, 2025, 02:59:59 pm by Richs1979 |
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Soldano / Rosamp SLO50 / 50W Amp Build
Started by RoadShow |
3 Replies
836 Views |
August 12, 2025, 01:25:12 pm by chaohore |
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DIY Brownface faceplate work
Started by bullkelp |
4 Replies
1051 Views |
August 11, 2025, 09:27:30 am by rake |
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103 Replies
24448 Views |
August 10, 2025, 10:00:30 pm by uki |
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5 Replies
1056 Views |
August 10, 2025, 03:34:46 pm by dragonbat13 |
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AA864 bass channel mod help - SOLVED
Started by bullkelp |
15 Replies
1425 Views |
August 09, 2025, 05:09:42 pm by bullkelp |
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Silicone filter caps down
Started by Blooze |
5 Replies
942 Views |
August 09, 2025, 11:06:12 am by Blooze |
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Roaches: Rolling your own
Started by stratomaster |
19 Replies
2046 Views |
August 08, 2025, 02:22:01 pm by astronomicum |
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Anyone have layout of soldano X88R?
Started by chaohore |
5 Replies
1000 Views |
August 08, 2025, 05:44:15 am by chaohore |
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Did I ruin my resevoir e-cap?
Started by pullshocks |
5 Replies
896 Views |
August 06, 2025, 04:01:46 pm by pullshocks |
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39 Replies
11881 Views |
August 06, 2025, 09:28:49 am by SpeedTrip |
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5 Replies
1064 Views |
August 05, 2025, 10:11:05 am by JPK |
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1 Replies
541 Views |
August 03, 2025, 06:52:50 am by EL34 |
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Rebuilding Fender Deluxe Reverb Reissue
Started by jaster55 |
5 Replies
2245 Views |
August 01, 2025, 07:42:54 pm by jaster55 |
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127 Replies
27144 Views |
July 31, 2025, 04:58:59 pm by plexi50 |
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Power section & bias checks
Started by Wonder2121 |
24 Replies
7128 Views |
July 31, 2025, 03:56:58 pm by Wonder2121 |
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"bleeder" resistor from primary fuse
Started by scstill |
1 Replies
516 Views |
July 31, 2025, 03:21:36 pm by tubeswell |
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Clean tube amp design
Started by FREYES_7 |
10 Replies
1926 Views |
July 31, 2025, 03:00:07 pm by HotBluePlates |
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34 Replies
4112 Views |
July 31, 2025, 10:56:45 am by tubeswell |
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Need to increase Negative bias voltage
Started by pbman1953 |
9 Replies
1513 Views |
July 30, 2025, 02:05:07 pm by pbman1953 |
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14 Replies
4236 Views |
July 29, 2025, 01:33:35 pm by TexasTone |
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MOVED: New Cab Design
Started by Willabe |
0 Replies
631 Views |
July 28, 2025, 08:01:12 am by Willabe |
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bass 400 +
Started by fredouille |
3 Replies
1326 Views |
July 27, 2025, 06:08:17 pm by tubeswell |
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