Welcome To the Hoffman Amplifiers Forum
September 06, 2025, 09:28:38 am
Welcome To the Hoffman Amplifiers ForumSeptember 06, 2025, 09:28:38 am | ||
| Subject / Started by | Replies / Views | Last post  |
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| 0 Members and 19 Guests are viewing this board. | ||||
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Power transformer wiring question
Started by Erik Aa |
23 Replies
4816 Views |
December 02, 2022, 01:38:04 pmby Erik Aa |
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59 Replies
62025 Views |
December 01, 2022, 04:01:27 pm by shooter |
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The danger of vacuum tubes
Started by isaac_teller |
5 Replies
2550 Views |
December 01, 2022, 03:44:28 pm by mresistor |
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Switch between 2 different output valves
Started by Paulycoo |
16 Replies
3322 Views |
December 01, 2022, 11:20:55 am by kagliostro |
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7 Replies
2222 Views |
November 30, 2022, 01:21:48 pm by fdesalvo |
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parallel input jack wiring
Started by BrainDeadAmps |
2 Replies
1715 Views |
November 30, 2022, 12:33:00 pm by BrainDeadAmps |
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16 Replies
3453 Views |
November 30, 2022, 11:58:57 am by BetterOffShred |
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AC10 Intensity in AC4? <<Solved>>
Started by dwinstonwood |
14 Replies
3867 Views |
November 30, 2022, 08:58:41 am by dwinstonwood |
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29 Replies
4959 Views |
November 29, 2022, 10:11:29 pm by JPK |
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Howling Feedback in Reveb Recovery
Started by jewishjay |
5 Replies
2435 Views |
November 29, 2022, 11:02:35 am by GroundhogKen |
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12 Replies
3201 Views |
November 29, 2022, 07:33:48 am by Williamblake |
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15 Replies
10584 Views |
November 27, 2022, 05:57:03 pm by kagliostro |
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Vox AC4 question. Need explanations.
Started by johngovan |
9 Replies
2864 Views |
November 27, 2022, 03:49:28 pm by kagliostro |
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10 Replies
3241 Views |
November 27, 2022, 04:59:22 am by fkitch |
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7 Replies
2774 Views |
November 26, 2022, 05:01:22 pm by PRR |
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2 Replies
1957 Views |
November 26, 2022, 10:42:19 am by acheld |
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9 Replies
3013 Views |
November 25, 2022, 05:29:03 pm by HotBluePlates |
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Steve Luckey November project
Started by isaac_teller |
3 Replies
1877 Views |
November 25, 2022, 02:45:17 pm by kagliostro |
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Any issues with this laylout
Started by dude |
12 Replies
3035 Views |
November 25, 2022, 02:23:50 pm by sluckey |
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15 Replies
4880 Views |
November 25, 2022, 09:19:39 am by kagliostro |
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16 Replies
4004 Views |
November 25, 2022, 02:07:04 am by Jennings |
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1M value for Treble pot.
Started by Mr.Death |
2 Replies
1753 Views |
November 24, 2022, 06:10:13 pm by Mr.Death |
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11 Replies
3334 Views |
November 24, 2022, 05:09:40 pm by tubeswell |
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Plate Resistor Type Question
Started by dragonbat13 |
3 Replies
1869 Views |
November 24, 2022, 05:05:17 pm by tubeswell |
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Coupling capacitors
Started by Mr.Death |
3 Replies
2109 Views |
November 24, 2022, 04:09:21 pm by PRR |
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Leslie 45cab/47 power amp
Started by Willabe |
9 Replies
4506 Views |
November 24, 2022, 03:38:45 pm by PRR |
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Hoffman Plexi 50 power supply
Started by Sergiouliana |
20 Replies
4257 Views |
November 24, 2022, 12:44:28 pm by pdf64 |
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Output Transformer calculation
Started by Williamblake |
2 Replies
2264 Views |
November 24, 2022, 10:32:06 am by Williamblake |
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Adding some bottom end to an AX84 High Octane
Started by JPK |
10 Replies
3488 Views |
November 24, 2022, 07:37:42 am by JPK |
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spongy feel in preamp
Started by 12AX7 |
21 Replies
4428 Views |
November 23, 2022, 09:57:55 pm by tubeswell |
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2 Replies
2038 Views |
November 23, 2022, 08:50:35 pm by MWaldorf |
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3 Replies
2683 Views |
November 23, 2022, 06:07:11 pm by sluckey |
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Bias question
Started by Mr.Death |
6 Replies
2174 Views |
November 22, 2022, 06:43:07 pm by Mr.Death |
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8 Replies
2420 Views |
November 22, 2022, 05:09:38 pm by sluckey |
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Grommet size applications
Started by Blooze |
11 Replies
3195 Views |
November 22, 2022, 05:00:47 pm by Blooze |
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1984 Mesa Mark II C+ Power Tube Diodes
Started by plexi50 |
25 Replies
5050 Views |
November 22, 2022, 02:41:57 pm by plexi50 |
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Hot and cold gain staging
Started by Mr.Death |
4 Replies
2300 Views |
November 22, 2022, 10:53:56 am by Mr.Death |
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35 Replies
6793 Views |
November 22, 2022, 04:37:18 am by DummyLoad |
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62 Replies
10231 Views |
November 21, 2022, 03:47:43 pm by JPK |
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2 Replies
1792 Views |
November 21, 2022, 12:46:07 pm by PRR |
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Philips 6411 PA tubeamp ground points
Started by kagliostro |
11 Replies
12505 Views |
November 21, 2022, 07:29:10 am by kjulhansen |
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6 Replies
3092 Views |
November 20, 2022, 12:44:13 pm by tubeswell |
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choke question
Started by 12AX7 |
8 Replies
2493 Views |
November 20, 2022, 05:32:22 am by pdf64 |
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2 Replies
1690 Views |
November 19, 2022, 08:03:01 am by scottcurry13 |
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Danelectro Amp repair, low bass Ch2
Started by dmp |
22 Replies
4076 Views |
November 18, 2022, 10:40:03 pm by dmp |
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4 Replies
2065 Views |
November 18, 2022, 10:16:01 pm by J3ona1 |
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15 Replies
3607 Views |
November 18, 2022, 08:40:32 pm by PRR |
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Are these tubes useful for amps?
Started by rafe |
16 Replies
4472 Views |
November 18, 2022, 04:40:30 pm by scstill |
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Comparing bias trem circuits
Started by Esquirefreak |
5 Replies
2447 Views |
November 18, 2022, 03:22:18 pm by tubeswell |
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Fender PA-100 Refurb
Started by davidb |
8 Replies
2863 Views |
November 17, 2022, 10:23:06 pm by davidb |
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Yard Sale Discontinued |
Misc. Hardware |
| What's New |
Board Building Parts |
Amp trim Handles |
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Lamps Diodes |
Hoffman Turret Boards |
Channel Switching |
| Resistors |
Fender Eyelet Boards |
Screws/Nuts Washers |
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Jacks/Plugs Connectors |
Misc Eyelet Boards |
Tools |
| Capacitors |
Custom Boards |
Tubes Valves |
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Pots Knobs |
Fuses/Cords |
Chassis |
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Tube Sockets |
Switches |
Wire Cable |