Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 05:12:49 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 05:12:49 pm | ||
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| 0 Members and 62 Guests are viewing this board. | ||||
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spongy feel in preamp
Started by 12AX7 |
21 Replies
4794 Views |
November 23, 2022, 09:57:55 pmby tubeswell |
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2 Replies
2175 Views |
November 23, 2022, 08:50:35 pm by MWaldorf |
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3 Replies
2898 Views |
November 23, 2022, 06:07:11 pm by sluckey |
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Bias question
Started by Mr.Death |
6 Replies
2296 Views |
November 22, 2022, 06:43:07 pm by Mr.Death |
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8 Replies
2626 Views |
November 22, 2022, 05:09:38 pm by sluckey |
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Grommet size applications
Started by Blooze |
11 Replies
3481 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
5397 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
2397 Views |
November 22, 2022, 10:53:56 am by Mr.Death |
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35 Replies
7529 Views |
November 22, 2022, 04:37:18 am by DummyLoad |
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62 Replies
11226 Views |
November 21, 2022, 03:47:43 pm by JPK |
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2 Replies
1985 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
12856 Views |
November 21, 2022, 07:29:10 am by kjulhansen |
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6 Replies
3326 Views |
November 20, 2022, 12:44:13 pm by tubeswell |
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choke question
Started by 12AX7 |
8 Replies
2652 Views |
November 20, 2022, 05:32:22 am by pdf64 |
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2 Replies
1828 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
4427 Views |
November 18, 2022, 10:40:03 pm by dmp |
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4 Replies
2303 Views |
November 18, 2022, 10:16:01 pm by J3ona1 |
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15 Replies
3875 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
4842 Views |
November 18, 2022, 04:40:30 pm by scstill |
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Comparing bias trem circuits
Started by Esquirefreak |
5 Replies
2623 Views |
November 18, 2022, 03:22:18 pm by tubeswell |
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Fender PA-100 Refurb
Started by davidb |
8 Replies
3123 Views |
November 17, 2022, 10:23:06 pm by davidb |
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5 Replies
2648 Views |
November 17, 2022, 10:00:27 pm by sluckey |
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5e8 preamp question.
Started by johngovan |
6 Replies
3021 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
2189 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
4020 Views |
November 17, 2022, 03:42:58 pm by HotBluePlates |
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Mesa Bottle Rocket - Circuit ?s
Started by BrassElephant |
6 Replies
2787 Views |
November 17, 2022, 07:23:14 am by BrassElephant |
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25 Replies
7767 Views |
November 17, 2022, 07:02:07 am by Balticnoiseforge |
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8 Replies
3388 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
3644 Views |
November 16, 2022, 04:11:43 pm by tubeswell |
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Everything Bias
Started by jim |
8 Replies
2942 Views |
November 16, 2022, 09:48:30 am by JPK |
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Marshall 9005 bias supply?
Started by Bubbastain |
18 Replies
4751 Views |
November 15, 2022, 03:18:46 pm by sluckey |
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19 Replies
5283 Views |
November 15, 2022, 03:25:18 am by pdf64 |
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Crate VC 3112 caps
Started by rake |
1 Replies
2129 Views |
November 15, 2022, 03:03:22 am by Latole |
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3 Replies
2369 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
5133 Views |
November 14, 2022, 11:08:49 am by sluckey |
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4 Replies
3295 Views |
November 14, 2022, 07:46:39 am by maltikeks |
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4 Replies
2247 Views |
November 14, 2022, 07:28:48 am by EL34 |
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what does this 470k do?
Started by 12AX7 |
15 Replies
3870 Views |
November 13, 2022, 06:57:27 pm by HotBluePlates |
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Bogen CHB 10A's Come alive
Started by Silvertone |
6 Replies
6593 Views |
November 13, 2022, 04:57:30 pm by moapys |
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DUAL50 problem keeps returning
Started by Bieworm |
8 Replies
3076 Views |
November 13, 2022, 01:36:36 pm by Jennings |
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remove tonestack from 2204 circuit
Started by joesatch |
4 Replies
2301 Views |
November 13, 2022, 12:12:27 pm by Jennings |
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0 Replies
1716 Views |
November 13, 2022, 10:32:33 am by scstill |
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Philips EL6401-02 popping mains fuse
Started by Jennings |
22 Replies
4751 Views |
November 13, 2022, 09:08:23 am by Jennings |
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18 Replies
5202 Views |
November 13, 2022, 06:14:21 am by Hoodnight |
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Installing a bias pot in a Blues Jr
Started by dude |
13 Replies
3855 Views |
November 12, 2022, 04:24:32 pm by dude |
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Dumble PCB boards project
Started by frusciante89 |
20 Replies
10924 Views |
November 12, 2022, 09:56:29 am by acheld |
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Brownface design question
Started by Greg |
0 Replies
1946 Views |
November 11, 2022, 08:51:23 pm by Greg |
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Potentiometer Wattage question
Started by Soulchief |
8 Replies
2535 Views |
November 11, 2022, 01:10:19 pm by Soulchief |
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43 Replies
9091 Views |
November 11, 2022, 11:31:10 am by Mike_J |
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18 Replies
5324 Views |
November 10, 2022, 11:06:24 pm by 12AX7 |
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