Welcome To the Hoffman Amplifiers Forum
July 25, 2026, 05:37:21 am
Welcome To the Hoffman Amplifiers ForumJuly 25, 2026, 05:37:21 am | ||
| Subject / Started by | Replies / Views | Last post  |
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| 0 Members and 58 Guests are viewing this board. | ||||
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bias ground
Started by joesatch |
11 Replies
5445 Views |
April 14, 2025, 06:15:32 pmby pdf64 |
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Squeal in the 77 Pentode channel
Started by scstill |
5 Replies
4810 Views |
April 14, 2025, 03:26:08 pm by scstill |
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Robinette JCM 800 Bias Problem
Started by B-Rex |
8 Replies
4163 Views |
April 14, 2025, 01:39:14 pm by B-Rex |
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RF noise filtering
Started by phsyconoodler |
15 Replies
16765 Views |
April 14, 2025, 09:53:04 am by scstill |
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20 Replies
7592 Views |
April 13, 2025, 11:05:28 pm by sec1rlr |
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PT Tap question
Started by joesatch |
1 Replies
3328 Views |
April 13, 2025, 08:46:37 pm by tubeswell |
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Hammond AO-44 conversion
Started by tubenit |
7 Replies
4566 Views |
April 13, 2025, 05:37:14 pm by tubenit |
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15 Replies
7024 Views |
April 13, 2025, 02:10:25 pm by wsscott |
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5E3 Kit - Bias Updated
Started by bbmade |
29 Replies
9201 Views |
April 13, 2025, 12:58:33 pm by bbmade |
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AC30C2 volume/gain pots do nothing.
Started by fossilshark |
6 Replies
4665 Views |
April 13, 2025, 04:06:53 am by tubeswell |
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OT primary impedance for push-pull amp
Started by gontek |
19 Replies
7566 Views |
April 12, 2025, 06:14:47 am by Merlin |
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Substitute a 5Y3 for a 5U4?
Started by Lectroid |
8 Replies
5251 Views |
April 11, 2025, 01:35:56 pm by Lectroid |
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rectify AC filament for DC on V1
Started by joesatch |
5 Replies
6543 Views |
April 11, 2025, 12:16:10 pm by Merlin |
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high octane push pull
Started by Beezerboy |
29 Replies
11354 Views |
April 11, 2025, 07:41:57 am by JPK |
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Tweed ODS 5879 Load Line
Started by stevefmt |
1 Replies
3446 Views |
April 10, 2025, 08:27:56 pm by tubenit |
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3 Replies
3942 Views |
April 10, 2025, 10:32:36 am by tubeswell |
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5F1 arc in tube 6V6
Started by FREYES_7 |
37 Replies
11547 Views |
April 09, 2025, 12:45:07 pm by FREYES_7 |
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help with channel debug. massive hiss
Started by joesatch |
8 Replies
4152 Views |
April 08, 2025, 10:25:27 pm by joesatch |
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Cathode resistor question
Started by Blooze |
8 Replies
4527 Views |
April 06, 2025, 11:59:08 pm by tubeswell |
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Project "scrap salvage"
Started by stw307 |
11 Replies
6222 Views |
April 06, 2025, 11:35:28 am by stw307 |
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3 Replies
5217 Views |
April 06, 2025, 08:26:56 am by filmdiary |
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1973 Twin Reverb Vibrato Issue
Started by plexi50 |
10 Replies
5104 Views |
April 05, 2025, 06:17:13 pm by plexi50 |
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Princeton Can Capacitor Question
Started by sec1rlr |
8 Replies
4479 Views |
April 05, 2025, 02:54:48 pm by sec1rlr |
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Relay switching grounding
Started by Jennings |
6 Replies
3689 Views |
April 05, 2025, 02:10:49 pm by Jennings |
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12 Replies
5391 Views |
April 05, 2025, 02:03:40 pm by HotBluePlates |
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19 Replies
7212 Views |
April 05, 2025, 09:55:47 am by HotBluePlates |
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Which Choke?
Started by passaloutre |
9 Replies
4078 Views |
April 05, 2025, 07:37:42 am by DummyLoad |
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136 Replies
30371 Views |
April 04, 2025, 10:19:20 am by wsscott |
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Is this a resistor?
Started by Zoe Warren |
3 Replies
3461 Views |
April 04, 2025, 09:25:58 am by Willabe |
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Lamington Reverb with Mods Layout
Started by dogburn |
4 Replies
6092 Views |
April 04, 2025, 09:02:12 am by dogburn |
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Slucky’s Tweed Deluxe Reverb
Started by Prento |
13 Replies
4626 Views |
April 04, 2025, 07:34:50 am by Tone Junkie |
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Questions about one-tube reverb circuit
Started by Diverted |
22 Replies
7416 Views |
April 03, 2025, 03:18:07 pm by Willabe |
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29 Replies
12462 Views |
April 02, 2025, 09:39:55 pm by marshallguy |
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Tone shaping a Chieftain build
Started by Duncan |
12 Replies
7453 Views |
April 02, 2025, 05:26:47 am by darkbluemurder |
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21 Replies
7828 Views |
April 01, 2025, 10:04:04 pm by Willabe |
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voltage divider assistance.
Started by joesatch |
6 Replies
4085 Views |
April 01, 2025, 12:50:42 pm by joesatch |
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1960s JMI AC10 Twin - I'm stuck...
Started by Yeatzee |
15 Replies
7104 Views |
April 01, 2025, 11:41:07 am by Yeatzee |
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6 Replies
4163 Views |
April 01, 2025, 10:43:05 am by passaloutre |
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EF86 - what to do with them
Started by SoundCity85 |
15 Replies
11630 Views |
April 01, 2025, 09:42:21 am by hgittela |
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7C5 Idea
Started by dwinstonwood « 1 2 » |
72 Replies
26150 Views |
April 01, 2025, 09:28:44 am by dwinstonwood |
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What is my scope showing me?
Started by stevefmt |
16 Replies
6730 Views |
April 01, 2025, 05:56:51 am by pdf64 |
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10 Replies
5219 Views |
March 31, 2025, 01:18:45 pm by Woodrow F Call |
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Popping noise on an Ampeg Gemini GV15
Started by Sansteeth |
9 Replies
4363 Views |
March 31, 2025, 11:34:30 am by Sansteeth |
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Hammond Mfg.
Started by pullshocks |
16 Replies
6562 Views |
March 30, 2025, 05:57:44 pm by AlNewman |
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15 Replies
6576 Views |
March 30, 2025, 05:33:36 pm by kagliostro |
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2 Replies
3443 Views |
March 30, 2025, 10:53:55 am by Lectroid |
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22 Replies
14098 Views |
March 29, 2025, 08:42:40 am by HotBluePlates |
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8 Replies
4540 Views |
March 29, 2025, 06:09:58 am by glass54 |
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ECL84 instead 6GW8?
Started by tubenit |
13 Replies
5925 Views |
March 29, 2025, 05:29:54 am by tubenit |
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2 Replies
3251 Views |
March 28, 2025, 04:37:32 am by Latole |
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