Welcome To the Hoffman Amplifiers Forum
December 08, 2025, 12:13:20 pm
Welcome To the Hoffman Amplifiers ForumDecember 08, 2025, 12:13:20 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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| astronomicum and 119 Guests are viewing this board. | ||||
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Danelectro Amp repair, low bass Ch2
Started by dmp |
22 Replies
4944 Views |
November 18, 2022, 10:40:03 pmby dmp |
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4 Replies
2651 Views |
November 18, 2022, 10:16:01 pm by J3ona1 |
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15 Replies
4341 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
5391 Views |
November 18, 2022, 04:40:30 pm by scstill |
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Comparing bias trem circuits
Started by Esquirefreak |
5 Replies
2877 Views |
November 18, 2022, 03:22:18 pm by tubeswell |
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Fender PA-100 Refurb
Started by davidb |
8 Replies
3513 Views |
November 17, 2022, 10:23:06 pm by davidb |
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5 Replies
2928 Views |
November 17, 2022, 10:00:27 pm by sluckey |
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5e8 preamp question.
Started by johngovan |
6 Replies
3400 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
2489 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
4721 Views |
November 17, 2022, 03:42:58 pm by HotBluePlates |
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Mesa Bottle Rocket - Circuit ?s
Started by BrassElephant |
6 Replies
3125 Views |
November 17, 2022, 07:23:14 am by BrassElephant |
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25 Replies
8765 Views |
November 17, 2022, 07:02:07 am by Balticnoiseforge |
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8 Replies
3830 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
4098 Views |
November 16, 2022, 04:11:43 pm by tubeswell |
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Everything Bias
Started by jim |
8 Replies
3300 Views |
November 16, 2022, 09:48:30 am by JPK |
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Marshall 9005 bias supply?
Started by Bubbastain |
18 Replies
5420 Views |
November 15, 2022, 03:18:46 pm by sluckey |
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19 Replies
6150 Views |
November 15, 2022, 03:25:18 am by pdf64 |
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Crate VC 3112 caps
Started by rake |
1 Replies
2367 Views |
November 15, 2022, 03:03:22 am by Latole |
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3 Replies
2621 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
5782 Views |
November 14, 2022, 11:08:49 am by sluckey |
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4 Replies
3724 Views |
November 14, 2022, 07:46:39 am by maltikeks |
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4 Replies
2522 Views |
November 14, 2022, 07:28:48 am by EL34 |
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what does this 470k do?
Started by 12AX7 |
15 Replies
4406 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
6961 Views |
November 13, 2022, 04:57:30 pm by moapys |
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DUAL50 problem keeps returning
Started by Bieworm |
8 Replies
3447 Views |
November 13, 2022, 01:36:36 pm by Jennings |
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remove tonestack from 2204 circuit
Started by joesatch |
4 Replies
2639 Views |
November 13, 2022, 12:12:27 pm by Jennings |
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0 Replies
1972 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
5229 Views |
November 13, 2022, 09:08:23 am by Jennings |
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18 Replies
5797 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
4333 Views |
November 12, 2022, 04:24:32 pm by dude |
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Dumble PCB boards project
Started by frusciante89 |
20 Replies
11566 Views |
November 12, 2022, 09:56:29 am by acheld |
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Brownface design question
Started by Greg |
0 Replies
2227 Views |
November 11, 2022, 08:51:23 pm by Greg |
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Potentiometer Wattage question
Started by Soulchief |
8 Replies
2919 Views |
November 11, 2022, 01:10:19 pm by Soulchief |
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43 Replies
9922 Views |
November 11, 2022, 11:31:10 am by Mike_J |
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18 Replies
5857 Views |
November 10, 2022, 11:06:24 pm by 12AX7 |
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6 Replies
2965 Views |
November 10, 2022, 10:45:57 pm by HotBluePlates |
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9 Replies
3399 Views |
November 10, 2022, 10:24:28 pm by ES125guy |
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Motorboating on bass pot
Started by Mr.Death |
20 Replies
4960 Views |
November 10, 2022, 09:44:33 am by Mr.Death |
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26 Replies
8635 Views |
November 09, 2022, 09:00:11 pm by thetragichero |
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Phoenix build
Started by Auke Jolman |
6 Replies
3249 Views |
November 09, 2022, 06:30:28 am by Auke Jolman |
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3 way NFB switch troubleshooting
Started by Ledvedder |
6 Replies
3268 Views |
November 09, 2022, 04:30:03 am by kagliostro |
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1930's radio conversion
Started by ALBATROS1234 |
6 Replies
3026 Views |
November 08, 2022, 07:37:06 pm by scstill |
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New 5e3 build voltage check
Started by Ledvedder |
10 Replies
3506 Views |
November 08, 2022, 11:17:55 am by JPK |
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99 Replies
18547 Views |
November 08, 2022, 09:17:42 am by pdf64 |
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0 Replies
2253 Views |
November 07, 2022, 06:21:39 pm by Steve Fundy |
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Scrap Build, Sluckey Dual Lite, planning
Started by CrocMule |
13 Replies
4609 Views |
November 07, 2022, 06:39:02 am by mresistor |
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15BD11A....
Started by TIMBO |
38 Replies
7849 Views |
November 07, 2022, 04:10:26 am by shooter |
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why the huge difference in R values?
Started by 12AX7 |
17 Replies
5492 Views |
November 06, 2022, 09:56:56 pm by 12AX7 |
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80 Replies
14607 Views |
November 06, 2022, 09:49:45 pm by Ledvedder |
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question about plate voltage to V1
Started by joesatch |
9 Replies
3368 Views |
November 05, 2022, 06:51:27 pm by HotBluePlates |
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