Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 03:10:45 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 03:10:45 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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| mountainhick and 77 Guests are viewing this board. | ||||
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Vintage Power Transformers
Started by HotBluePlates |
6 Replies
5237 Views |
June 09, 2023, 09:29:00 pmby trobbins |
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quick dc heater question
Started by fossilshark |
8 Replies
2591 Views |
June 08, 2023, 01:13:03 am by kagliostro |
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Wendigo preamp noise
Started by fossilshark |
16 Replies
4062 Views |
June 07, 2023, 06:04:31 pm by PRR |
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Phase inverter with EF86
Started by Leevi |
10 Replies
2913 Views |
June 07, 2023, 12:52:05 pm by isaac_teller |
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B15- change or leave parts
Started by pbman1953 |
48 Replies
7993 Views |
June 07, 2023, 11:17:34 am by pbman1953 |
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28 Replies
5123 Views |
June 07, 2023, 11:01:27 am by Diverted |
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43 Replies
8088 Views |
June 06, 2023, 10:01:16 pm by Champ_49 |
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isolate the ground?
Started by joesatch |
25 Replies
5330 Views |
June 06, 2023, 11:23:03 am by Williamblake |
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Split Cathodes
Started by shaun |
14 Replies
3722 Views |
June 05, 2023, 11:15:32 pm by shaun |
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DC heaters and LED pilot light
Started by fossilshark |
1 Replies
1857 Views |
June 05, 2023, 07:32:16 pm by sluckey |
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Name the component
Started by Lectroid |
10 Replies
3432 Views |
June 05, 2023, 09:58:53 am by Lectroid |
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Good tube-amp-oriented podcast
Started by Lectroid |
1 Replies
2133 Views |
June 04, 2023, 08:35:53 pm by passaloutre |
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small chassis layout
Started by joesatch |
8 Replies
3026 Views |
June 04, 2023, 07:15:03 pm by sluckey |
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smaller AB761
Started by Beezerboy |
10 Replies
3642 Views |
June 04, 2023, 12:56:17 pm by Beezerboy |
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0 Replies
1719 Views |
June 04, 2023, 09:42:08 am by marshallguy |
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KT90EH biasing discrepancy
Started by marshallguy |
5 Replies
2757 Views |
June 04, 2023, 08:46:48 am by marshallguy |
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Marshall DSL 20R
Started by luthiernc |
0 Replies
1888 Views |
June 03, 2023, 06:05:45 am by luthiernc |
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13 Replies
3388 Views |
June 02, 2023, 02:00:46 pm by PRR |
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Parallel triode Rg values
Started by Esquirefreak |
3 Replies
1998 Views |
June 01, 2023, 01:42:27 pm by Esquirefreak |
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8 Replies
3630 Views |
June 01, 2023, 12:51:18 pm by tubeswell |
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Vox AC-15 Vibrato channel low volume
Started by sluckey |
8 Replies
3206 Views |
May 31, 2023, 10:31:13 pm by sluckey |
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8 Replies
2926 Views |
May 31, 2023, 04:59:27 pm by fossilshark |
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Bias Calculations for Cathode bias??
Started by Jalmeida |
10 Replies
3826 Views |
May 31, 2023, 11:02:58 am by Lectroid |
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30ish watt bass amp
Started by Beezerboy |
16 Replies
4049 Views |
May 30, 2023, 08:19:17 am by Lectroid |
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28 Replies
5454 Views |
May 29, 2023, 06:04:07 pm by jeff |
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11 Replies
2983 Views |
May 29, 2023, 04:27:27 pm by mresistor |
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11 Replies
3116 Views |
May 29, 2023, 12:54:43 pm by dude |
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Gretsch Playboy 6156T No Schematic Found
Started by plexi50 |
12 Replies
3591 Views |
May 29, 2023, 11:07:44 am by plexi50 |
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pre-made fwb rectifiers
Started by joesatch |
11 Replies
3195 Views |
May 29, 2023, 10:28:40 am by thetragichero |
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5 Replies
2616 Views |
May 28, 2023, 04:06:11 pm by Porpoise Head |
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1964 Vibroverb
Started by Rockranger |
9 Replies
2987 Views |
May 28, 2023, 12:39:32 pm by Rockranger |
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Effects Loop Questions
Started by Rontone |
6 Replies
3292 Views |
May 28, 2023, 11:48:55 am by Rontone |
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Nolan 50w Multi Purpose Amp Repair
Started by Rontone |
7 Replies
3291 Views |
May 28, 2023, 09:40:00 am by Rontone |
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Traynor YVM-1 much needed repair
Started by fossilshark |
11 Replies
3352 Views |
May 28, 2023, 09:15:08 am by sluckey |
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13 Replies
3766 Views |
May 27, 2023, 06:27:19 am by p2pAmps |
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8 Replies
2988 Views |
May 26, 2023, 01:40:21 pm by tdvt |
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Primary voltage readings
Started by TF2112 |
6 Replies
2380 Views |
May 26, 2023, 11:37:55 am by TF2112 |
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Hot switch or JCM 800
Started by Bigampman |
9 Replies
3092 Views |
May 26, 2023, 10:59:24 am by pdf64 |
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Gibson GA-16T/18T done
Started by Blooze |
29 Replies
5760 Views |
May 25, 2023, 08:40:30 pm by Blooze |
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6SJ7 driven tremolo? Silvertone1333
Started by Jerry garrcia |
1 Replies
1736 Views |
May 25, 2023, 04:42:40 pm by sluckey |
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Hum from power section
Started by Colas LeGrippa |
11 Replies
3113 Views |
May 25, 2023, 12:09:21 pm by Colas LeGrippa |
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jcm800 2204 noisy
Started by fossilshark |
3 Replies
2205 Views |
May 25, 2023, 09:22:14 am by fossilshark |
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Marshall 2550 schematic
Started by Leevi |
1 Replies
2198 Views |
May 25, 2023, 06:30:26 am by sluckey |
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7 Replies
2608 Views |
May 25, 2023, 06:21:13 am by sluckey |
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5 Replies
2295 Views |
May 25, 2023, 02:46:55 am by kagliostro |
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32 Replies
6098 Views |
May 24, 2023, 08:46:35 pm by Apexelectric |
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0 Replies
1680 Views |
May 24, 2023, 07:16:08 pm by marshallguy |
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5 Replies
2969 Views |
May 23, 2023, 09:36:41 pm by Amped |
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Cathode bias amp variable resistor
Started by Colas LeGrippa |
19 Replies
5041 Views |
May 23, 2023, 07:04:33 pm by Colas LeGrippa |
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EF86 Microphonics and RF coupling?
Started by Jalmeida |
1 Replies
1770 Views |
May 23, 2023, 12:46:50 pm by Williamblake |
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