Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 08:48:57 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 08:48:57 pm | ||
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| AlNewman and 64 Guests are viewing this board. | ||||
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Identify resistor value
Started by dude |
4 Replies
2142 Views |
January 17, 2021, 07:57:43 pmby dude |
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EL34 drawing current
Started by SoundCity85 |
19 Replies
7854 Views |
January 17, 2021, 07:23:42 pm by HotBluePlates |
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2 Replies
2087 Views |
January 17, 2021, 03:25:56 pm by jordan86 |
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8 Replies
2693 Views |
January 17, 2021, 01:10:17 pm by Mike_J |
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16 Replies
7356 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
2436 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
1845 Views |
January 15, 2021, 04:48:11 pm by sluckey |
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Dual gang pot options
Started by jordan86 |
5 Replies
2968 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
8549 Views |
January 15, 2021, 03:06:25 pm by drew |
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DC heaters
Started by proaudioguy |
3 Replies
1804 Views |
January 15, 2021, 03:04:58 pm by SnickSound |
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Measuring amperage draw
Started by pbman1953 |
9 Replies
3316 Views |
January 15, 2021, 01:36:01 pm by sluckey |
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9 Replies
3788 Views |
January 15, 2021, 12:06:47 pm by Bieworm |
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26 Replies
8271 Views |
January 15, 2021, 04:57:12 am by Joel |
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Artificial heater center tap question
Started by Bieworm |
5 Replies
2664 Views |
January 15, 2021, 03:42:44 am by Latole |
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My Hoffman Twin Reverb - Tremolo
Started by proaudioguy |
7 Replies
3440 Views |
January 15, 2021, 02:05:05 am by proaudioguy |
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AA864 Musings
Started by dwinstonwood « 1 2 3 » |
138 Replies
27196 Views |
January 14, 2021, 08:40:40 pm by dwinstonwood |
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SE OT power requirements + biasing
Started by jordan86 |
3 Replies
2626 Views |
January 14, 2021, 02:53:59 pm by shooter |
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Imperial clone OD channel change
Started by Bieworm |
3 Replies
2151 Views |
January 14, 2021, 09:24:35 am by Bieworm |
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2 Replies
1953 Views |
January 12, 2021, 07:24:13 pm by sluckey |
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COS build
Started by Auke Jolman |
16 Replies
4603 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
5151 Views |
January 11, 2021, 07:45:32 pm by dude |
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14 Replies
4500 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
2071 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
4731 Views |
January 10, 2021, 03:23:29 pm by sluckey |
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21 Replies
5864 Views |
January 10, 2021, 02:01:26 pm by Mike_J |
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PPIMV question
Started by dude |
11 Replies
3929 Views |
January 10, 2021, 12:03:15 pm by dude |
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7 Replies
2721 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
6315 Views |
January 08, 2021, 08:40:18 pm by sluckey |
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26 Replies
8620 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
2832 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
5768 Views |
January 08, 2021, 12:27:05 pm by jordan86 |
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24 Replies
5354 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
3215 Views |
January 07, 2021, 10:49:43 pm by 2deaf |
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Super reverb tube bias
Started by Underwood |
5 Replies
3181 Views |
January 07, 2021, 05:46:28 am by sluckey |
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Musicson 80+80
Started by chocopower |
17 Replies
5671 Views |
January 07, 2021, 04:08:08 am by chocopower |
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0 Replies
1681 Views |
January 06, 2021, 06:13:26 pm by dankinzelman |
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1 Replies
1577 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
4034 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
6303 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
3610 Views |
January 05, 2021, 11:53:16 am by swingarm |
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I broke my amp
Started by dwinstonwood |
37 Replies
6741 Views |
January 05, 2021, 09:14:02 am by dwinstonwood |
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dual 6V6 single end by DummyLoad
Started by Mungo Park |
2 Replies
1957 Views |
January 04, 2021, 10:28:54 pm by Mungo Park |
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3 Replies
1942 Views |
January 04, 2021, 09:22:19 pm by Gareth81 |
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12AX7 Stage 1 + 2 Biasing
Started by jordan86 |
3 Replies
3184 Views |
January 04, 2021, 08:50:17 pm by AmberB |
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Sluckey AC-15R Build Reverb Issue
Started by shaun |
14 Replies
3968 Views |
January 04, 2021, 08:13:18 pm by sluckey |
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First Build - Pro Junior???
Started by shark38j |
2 Replies
2451 Views |
January 04, 2021, 06:14:34 pm by scstill |
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0 Replies
1727 Views |
January 04, 2021, 03:04:44 pm by Opry Audio |
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ValveWizard PCB / BJ Hybrid Project
Started by acheld |
7 Replies
3286 Views |
January 04, 2021, 01:54:22 pm by Crestone |
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Need help picking parts on the store
Started by proaudioguy |
4 Replies
2146 Views |
January 04, 2021, 10:09:07 am by sluckey |
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4 Replies
2903 Views |
January 04, 2021, 04:36:32 am by DummyLoad |
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