Welcome To the Hoffman Amplifiers Forum
January 24, 2026, 05:20:14 am
Welcome To the Hoffman Amplifiers ForumJanuary 24, 2026, 05:20:14 am | ||
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even MORE AO44 fun
Started by thetragichero |
1 Replies
2235 Views |
January 19, 2021, 11:21:05 amby SILVERGUN |
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Power transformer primary taps.
Started by chocopower |
3 Replies
2571 Views |
January 19, 2021, 08:49:18 am by sluckey |
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Extend bias range
Started by Bugman3183 |
3 Replies
2542 Views |
January 18, 2021, 03:43:41 pm by glass54 |
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Is dog house too tight?
Started by Mike_J |
22 Replies
6822 Views |
January 18, 2021, 02:30:14 pm by Mike_J |
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55 Replies
11750 Views |
January 18, 2021, 01:30:43 pm by pbman1953 |
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Harvard 5F10 bias pot
Started by Diverted |
7 Replies
4106 Views |
January 18, 2021, 12:44:41 pm by Diverted |
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5 Replies
3073 Views |
January 18, 2021, 10:26:28 am by Mike_J |
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125A6AX OT
Started by Leevi |
1 Replies
2295 Views |
January 18, 2021, 03:33:29 am by thetragichero |
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2 Replies
2829 Views |
January 17, 2021, 10:17:09 pm by scstill |
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Identify resistor value
Started by dude |
4 Replies
2647 Views |
January 17, 2021, 07:57:43 pm by dude |
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EL34 drawing current
Started by SoundCity85 |
19 Replies
9009 Views |
January 17, 2021, 07:23:42 pm by HotBluePlates |
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2 Replies
2494 Views |
January 17, 2021, 03:25:56 pm by jordan86 |
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8 Replies
3358 Views |
January 17, 2021, 01:10:17 pm by Mike_J |
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16 Replies
8147 Views |
January 16, 2021, 02:33:38 pm by Mungo Park |
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GND problems- 2.3Volts to chasis.
Started by raza |
5 Replies
2939 Views |
January 16, 2021, 02:06:31 pm by raza |
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Harvard 5F10 preamp grid resistor size
Started by Diverted |
2 Replies
2314 Views |
January 15, 2021, 04:48:11 pm by sluckey |
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Dual gang pot options
Started by jordan86 |
5 Replies
3566 Views |
January 15, 2021, 04:21:24 pm by jordan86 |
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Fender VibroChamp '78 B+ voltage low
Started by fpolak |
44 Replies
10022 Views |
January 15, 2021, 03:06:25 pm by drew |
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DC heaters
Started by proaudioguy |
3 Replies
2268 Views |
January 15, 2021, 03:04:58 pm by SnickSound |
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Measuring amperage draw
Started by pbman1953 |
9 Replies
3983 Views |
January 15, 2021, 01:36:01 pm by sluckey |
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9 Replies
4588 Views |
January 15, 2021, 12:06:47 pm by Bieworm |
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26 Replies
9433 Views |
January 15, 2021, 04:57:12 am by Joel |
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Artificial heater center tap question
Started by Bieworm |
5 Replies
3169 Views |
January 15, 2021, 03:42:44 am by Latole |
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My Hoffman Twin Reverb - Tremolo
Started by proaudioguy |
7 Replies
4068 Views |
January 15, 2021, 02:05:05 am by proaudioguy |
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AA864 Musings
Started by dwinstonwood « 1 2 3 » |
138 Replies
32596 Views |
January 14, 2021, 08:40:40 pm by dwinstonwood |
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SE OT power requirements + biasing
Started by jordan86 |
3 Replies
3100 Views |
January 14, 2021, 02:53:59 pm by shooter |
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Imperial clone OD channel change
Started by Bieworm |
3 Replies
2512 Views |
January 14, 2021, 09:24:35 am by Bieworm |
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2 Replies
2410 Views |
January 12, 2021, 07:24:13 pm by sluckey |
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COS build
Started by Auke Jolman |
16 Replies
5352 Views |
January 12, 2021, 11:28:07 am by Auke Jolman |
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Cathode biasing a pair of EL34s
Started by dude |
10 Replies
6009 Views |
January 11, 2021, 07:45:32 pm by dude |
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14 Replies
5174 Views |
January 11, 2021, 03:44:21 am by Latole |
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Rob Robinette RR 763 BUILD WHAT CHASSIS?
Started by mikhett |
1 Replies
2492 Views |
January 10, 2021, 03:33:59 pm by jordan86 |
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Hagström 310 - make it more Supro-esque?
Started by Sesh |
11 Replies
5371 Views |
January 10, 2021, 03:23:29 pm by sluckey |
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21 Replies
7003 Views |
January 10, 2021, 02:01:26 pm by Mike_J |
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PPIMV question
Started by dude |
11 Replies
4659 Views |
January 10, 2021, 12:03:15 pm by dude |
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7 Replies
3245 Views |
January 09, 2021, 08:05:28 am by pbman1953 |
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Why did my filter cap go poof?
Started by jewishjay |
29 Replies
7555 Views |
January 08, 2021, 08:40:18 pm by sluckey |
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26 Replies
10099 Views |
January 08, 2021, 05:02:36 pm by AHeck |
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Biasing/hum issue, Fender Bassman AB165
Started by Diverted |
5 Replies
3346 Views |
January 08, 2021, 02:29:41 pm by Diverted |
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Good deal on a Dual Showman?
Started by jordan86 |
23 Replies
6707 Views |
January 08, 2021, 12:27:05 pm by jordan86 |
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24 Replies
6439 Views |
January 08, 2021, 11:18:58 am by Mike_J |
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power rating calculations (math inside)
Started by Sansteeth |
12 Replies
4007 Views |
January 07, 2021, 10:49:43 pm by 2deaf |
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Super reverb tube bias
Started by Underwood |
5 Replies
3779 Views |
January 07, 2021, 05:46:28 am by sluckey |
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Musicson 80+80
Started by chocopower |
17 Replies
6373 Views |
January 07, 2021, 04:08:08 am by chocopower |
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0 Replies
1958 Views |
January 06, 2021, 06:13:26 pm by dankinzelman |
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1 Replies
1938 Views |
January 06, 2021, 02:17:09 pm by mebond11 |
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New Year Modularity - New Preamp Build
Started by Crestone |
15 Replies
4839 Views |
January 06, 2021, 06:18:49 am by Crestone |
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Dual single ended 6V6 build issue
Started by Morse-Electric |
20 Replies
7421 Views |
January 05, 2021, 04:40:29 pm by PRR |
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Supro 1605r can't find a schematic!
Started by swingarm |
6 Replies
4282 Views |
January 05, 2021, 11:53:16 am by swingarm |
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I broke my amp
Started by dwinstonwood |
37 Replies
7885 Views |
January 05, 2021, 09:14:02 am by dwinstonwood |
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