Welcome To the Hoffman Amplifiers Forum
January 24, 2026, 05:20:11 am
Welcome To the Hoffman Amplifiers ForumJanuary 24, 2026, 05:20:11 am | ||
| Subject / Started by | Replies / Views | Last post  |
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| 0 Members and 38 Guests are viewing this board. | ||||
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V1 triodes question
Started by joesatch |
8 Replies
3602 Views |
July 24, 2022, 09:47:24 pmby thetragichero |
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PSA preamp tubes
Started by joesatch |
12 Replies
3718 Views |
July 24, 2022, 12:37:52 pm by pullshocks |
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15 Replies
9637 Views |
July 24, 2022, 10:04:42 am by tmknight |
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14 Replies
4887 Views |
July 23, 2022, 10:07:16 am by Platefire |
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6g4 Super Clone (mostly done)
Started by owen |
46 Replies
11969 Views |
July 22, 2022, 12:28:40 pm by owen |
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Simplify or remove tonestack?
Started by joesatch |
7 Replies
3440 Views |
July 22, 2022, 09:26:41 am by jordan86 |
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Lamington Reverb… a little more volume?
Started by chris s |
16 Replies
6005 Views |
July 21, 2022, 09:04:55 pm by chris s |
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HRD Preamp Plate Voltages - SOLVED
Started by bbmade |
7 Replies
3238 Views |
July 21, 2022, 12:05:48 pm by bbmade |
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Use of relay on input?
Started by joesatch |
8 Replies
3774 Views |
July 21, 2022, 11:40:52 am by sluckey |
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Troubleshooting noisy reverb
Started by winterturtle |
5 Replies
2864 Views |
July 21, 2022, 03:32:03 am by tubeswell |
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preamp layout with triodes
Started by joesatch |
3 Replies
2249 Views |
July 20, 2022, 11:05:03 am by joesatch |
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3 Replies
2728 Views |
July 20, 2022, 05:21:10 am by BlackCrowe604 |
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Crate Stealth 50 power issue
Started by navdave |
6 Replies
3293 Views |
July 20, 2022, 12:28:31 am by navdave |
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Rob Robinette's bias calculator
Started by dude |
14 Replies
5874 Views |
July 19, 2022, 09:03:35 pm by PRR |
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Negative Feedback Causing Oscillation?
Started by AHeck |
19 Replies
6987 Views |
July 18, 2022, 07:16:19 am by AHeck |
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Coupling caps 400v
Started by joesatch |
24 Replies
6900 Views |
July 17, 2022, 05:01:28 pm by sluckey |
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Speaker for 5E3 Kit?
Started by bbmade |
11 Replies
4139 Views |
July 17, 2022, 04:18:44 am by JB |
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18 Replies
5244 Views |
July 17, 2022, 02:41:57 am by kagliostro |
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Examples of high voltage relay
Started by CascoSieg |
5 Replies
2947 Views |
July 16, 2022, 08:03:38 pm by DummyLoad |
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Dual 50 Amp
Started by Big_Mike |
6 Replies
3579 Views |
July 16, 2022, 05:16:11 pm by Apexelectric |
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Supro 1688TN Power Section
Started by Vez |
12 Replies
4204 Views |
July 15, 2022, 08:17:38 pm by bmccowan |
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IEC connector location
Started by MrBreeze |
4 Replies
2803 Views |
July 15, 2022, 01:29:37 pm by MrBreeze |
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Chassis Material preferences
Started by MrBreeze |
11 Replies
3872 Views |
July 15, 2022, 07:13:17 am by sluckey |
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29 Replies
7746 Views |
July 14, 2022, 03:54:58 pm by HotBluePlates |
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Electronics theory question
Started by nandrewjackson |
9 Replies
4389 Views |
July 14, 2022, 04:09:28 am by shooter |
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59 Replies
19473 Views |
July 13, 2022, 05:59:25 pm by cspar |
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preamp cathodes to ground location
Started by joesatch |
3 Replies
2701 Views |
July 13, 2022, 04:45:49 pm by tubeswell |
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Average Screen Current
Started by HotBluePlates |
17 Replies
8223 Views |
July 13, 2022, 08:53:34 am by DuaneOh |
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Where to insert Standby Switch?
Started by winterturtle |
4 Replies
3505 Views |
July 12, 2022, 04:34:31 pm by winterturtle |
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31 Replies
7956 Views |
July 12, 2022, 07:04:44 am by winterturtle |
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Eliminating RobRob's Hum balance ckt.
Started by JustMike |
1 Replies
2314 Views |
July 11, 2022, 07:46:46 pm by sluckey |
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8 Replies
4432 Views |
July 11, 2022, 02:45:18 pm by HotBluePlates |
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1965 Kay 703C - OT replacement questions
Started by Carlsoti |
6 Replies
3167 Views |
July 11, 2022, 11:34:59 am by PRR |
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Schematic question
Started by Vil |
7 Replies
3154 Views |
July 11, 2022, 09:45:18 am by sluckey |
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Sluckey matchless board
Started by ok_state_blues |
4 Replies
2955 Views |
July 10, 2022, 05:03:30 pm by ok_state_blues |
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Blackstar HT-20R
Started by EL34 |
8 Replies
4712 Views |
July 10, 2022, 12:35:50 pm by rake |
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Gibson GA-5 build - good till 9.5
Started by Keyboy |
5 Replies
3827 Views |
July 10, 2022, 06:04:35 am by ShoemanGB |
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3 Replies
2883 Views |
July 09, 2022, 11:19:23 am by sluckey |
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Using an External Cab for Fender '68 Custom Vibro Champ Reverb
Started by reginom72 |
4 Replies
3920 Views |
July 08, 2022, 11:38:14 pm by PRR |
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12vdc heaters elevated?
Started by joesatch |
12 Replies
4195 Views |
July 08, 2022, 02:56:51 pm by PRR |
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3 Replies
2916 Views |
July 08, 2022, 02:53:50 pm by PRR |
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1974 Fender Twin Reverb (Master Volume) Circuit Question
Started by reginom72 |
0 Replies
2776 Views |
July 08, 2022, 12:48:04 pm by reginom72 |
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5 Replies
3283 Views |
July 08, 2022, 12:42:56 am by kagliostro |
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Ampeg Gemini 1 OT identification
Started by ndross475 |
2 Replies
2616 Views |
July 07, 2022, 04:09:28 pm by sluckey |
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diodes/rectifier switch
Started by isaac_teller |
8 Replies
3804 Views |
July 07, 2022, 12:32:40 pm by isaac_teller |
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Vox AC15H1TV - Hum and channel bleed
Started by kristianf |
0 Replies
2843 Views |
July 05, 2022, 06:48:13 pm by kristianf |
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Bias circuit question.
Started by joesatch |
4 Replies
3138 Views |
July 05, 2022, 05:46:19 pm by nandrewjackson |
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20 Replies
6343 Views |
July 05, 2022, 07:09:00 am by pdf64 |
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AMPEG B15 issue
Started by Colas LeGrippa |
4 Replies
3036 Views |
July 04, 2022, 07:24:50 pm by SoundmasterG |
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ECC83 issue, high voltage output
Started by hozone |
6 Replies
3355 Views |
July 04, 2022, 01:26:03 pm by hozone |
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