Welcome To the Hoffman Amplifiers Forum
January 23, 2026, 09:41:48 pm
Welcome To the Hoffman Amplifiers ForumJanuary 23, 2026, 09:41:48 pm | ||
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| apeontheweb and 53 Guests are viewing this board. | ||||
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9 Replies
3726 Views |
November 25, 2022, 05:29:03 pmby HotBluePlates |
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Steve Luckey November project
Started by isaac_teller |
3 Replies
2314 Views |
November 25, 2022, 02:45:17 pm by kagliostro |
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Any issues with this laylout
Started by dude |
12 Replies
4120 Views |
November 25, 2022, 02:23:50 pm by sluckey |
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15 Replies
6491 Views |
November 25, 2022, 09:19:39 am by kagliostro |
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16 Replies
5151 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
2338 Views |
November 24, 2022, 06:10:13 pm by Mr.Death |
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11 Replies
4471 Views |
November 24, 2022, 05:09:40 pm by tubeswell |
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Plate Resistor Type Question
Started by dragonbat13 |
3 Replies
2538 Views |
November 24, 2022, 05:05:17 pm by tubeswell |
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Coupling capacitors
Started by Mr.Death |
3 Replies
2578 Views |
November 24, 2022, 04:09:21 pm by PRR |
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Leslie 45cab/47 power amp
Started by Willabe |
9 Replies
6022 Views |
November 24, 2022, 03:38:45 pm by PRR |
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Hoffman Plexi 50 power supply
Started by Sergiouliana |
20 Replies
5567 Views |
November 24, 2022, 12:44:28 pm by pdf64 |
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Output Transformer calculation
Started by Williamblake |
2 Replies
3026 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
4746 Views |
November 24, 2022, 07:37:42 am by JPK |
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spongy feel in preamp
Started by 12AX7 |
21 Replies
5978 Views |
November 23, 2022, 09:57:55 pm by tubeswell |
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2 Replies
2615 Views |
November 23, 2022, 08:50:35 pm by MWaldorf |
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3 Replies
3602 Views |
November 23, 2022, 06:07:11 pm by sluckey |
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Bias question
Started by Mr.Death |
6 Replies
2796 Views |
November 22, 2022, 06:43:07 pm by Mr.Death |
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8 Replies
3445 Views |
November 22, 2022, 05:09:38 pm by sluckey |
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Grommet size applications
Started by Blooze |
11 Replies
4424 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
6655 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
2886 Views |
November 22, 2022, 10:53:56 am by Mr.Death |
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35 Replies
9763 Views |
November 22, 2022, 04:37:18 am by DummyLoad |
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62 Replies
14157 Views |
November 21, 2022, 03:47:43 pm by JPK |
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2 Replies
2621 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
13870 Views |
November 21, 2022, 07:29:10 am by kjulhansen |
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choke question
Started by 12AX7 |
8 Replies
3237 Views |
November 20, 2022, 05:32:22 am by pdf64 |
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2 Replies
2446 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
5697 Views |
November 18, 2022, 10:40:03 pm by dmp |
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4 Replies
3045 Views |
November 18, 2022, 10:16:01 pm by J3ona1 |
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15 Replies
4859 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
6020 Views |
November 18, 2022, 04:40:30 pm by scstill |
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Comparing bias trem circuits
Started by Esquirefreak |
5 Replies
3218 Views |
November 18, 2022, 03:22:18 pm by tubeswell |
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Fender PA-100 Refurb
Started by davidb |
8 Replies
3936 Views |
November 17, 2022, 10:23:06 pm by davidb |
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5 Replies
3249 Views |
November 17, 2022, 10:00:27 pm by sluckey |
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5e8 preamp question.
Started by johngovan |
6 Replies
3827 Views |
November 17, 2022, 09:46:30 pm by johngovan |
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Dual Triode Tube Testing, Curve Tracer
Started by W5FH |
2 Replies
2789 Views |
November 17, 2022, 03:59:06 pm by HotBluePlates |
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Vox AC10 and AC15 100R EL84 resistors
Started by Jalmeida |
9 Replies
5407 Views |
November 17, 2022, 03:42:58 pm by HotBluePlates |
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Mesa Bottle Rocket - Circuit ?s
Started by BrassElephant |
6 Replies
3493 Views |
November 17, 2022, 07:23:14 am by BrassElephant |
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25 Replies
9726 Views |
November 17, 2022, 07:02:07 am by Balticnoiseforge |
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8 Replies
4271 Views |
November 16, 2022, 08:58:06 pm by punkykatt |
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AC30 screen and grid resistor values
Started by allstonma |
5 Replies
4614 Views |
November 16, 2022, 04:11:43 pm by tubeswell |
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Everything Bias
Started by jim |
8 Replies
3734 Views |
November 16, 2022, 09:48:30 am by JPK |
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Marshall 9005 bias supply?
Started by Bubbastain |
18 Replies
6163 Views |
November 15, 2022, 03:18:46 pm by sluckey |
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19 Replies
6989 Views |
November 15, 2022, 03:25:18 am by pdf64 |
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Crate VC 3112 caps
Started by rake |
1 Replies
2713 Views |
November 15, 2022, 03:03:22 am by Latole |
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3 Replies
2980 Views |
November 14, 2022, 04:40:31 pm by CrocMule |
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Presence contol placement within NFB loop
Started by 12AX7 |
20 Replies
6500 Views |
November 14, 2022, 11:08:49 am by sluckey |
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4 Replies
4265 Views |
November 14, 2022, 07:46:39 am by maltikeks |
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4 Replies
2925 Views |
November 14, 2022, 07:28:48 am by EL34 |
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what does this 470k do?
Started by 12AX7 |
15 Replies
5075 Views |
November 13, 2022, 06:57:27 pm by HotBluePlates |
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