Welcome To the Hoffman Amplifiers Forum
December 08, 2025, 03:41:51 pm
Welcome To the Hoffman Amplifiers ForumDecember 08, 2025, 03:41:51 pm | ||
| Subject / Started by | Replies / Views | Last post  |
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Couple question on power rail voltages
Started by dude |
5 Replies
3768 Views |
May 02, 2017, 08:08:02 amby jjasilli |
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68 Marshall 50W plexi on the bench
Started by TubeGeek |
5 Replies
4424 Views |
May 02, 2017, 02:01:49 am by purpletele |
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Pro-Amp_5E5_reverb/5E5_Pro_amp__w_reverb
Started by frankenxtein « 1 2 » |
60 Replies
14856 Views |
May 01, 2017, 03:31:43 pm by frankenxtein |
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Ab763 filter cap grounding photos?
Started by nickp |
4 Replies
2758 Views |
April 29, 2017, 10:30:56 am by nickp |
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First 2-channel amp build
Started by John |
6 Replies
2837 Views |
April 28, 2017, 07:48:23 pm by John |
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24 Replies
9589 Views |
April 28, 2017, 07:26:31 pm by drgonzonm |
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Airline model 9004 schematic
Started by HighAndDry |
13 Replies
4729 Views |
April 28, 2017, 06:04:07 pm by PRR |
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Negative Feedback Question
Started by dude |
18 Replies
5801 Views |
April 28, 2017, 01:38:14 pm by dude |
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23 Replies
6587 Views |
April 28, 2017, 09:53:32 am by Joeriz |
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Blackstar ISF
Started by Leevi |
4 Replies
3044 Views |
April 27, 2017, 04:20:35 pm by pompeiisneaks |
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Kagliostro 12AU7 push pull schematic
Started by Ritchie200 « 1 2 » |
61 Replies
29138 Views |
April 27, 2017, 03:20:31 pm by PRR |
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6MB8 Mini-Bassman Standard
Started by purpletele « 1 2 » |
62 Replies
19646 Views |
April 27, 2017, 12:39:44 pm by purpletele |
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Modding/Converting 100w Carlsbro amp
Started by JayCobie |
11 Replies
5942 Views |
April 27, 2017, 11:46:24 am by MartinB |
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2 Replies
2428 Views |
April 27, 2017, 01:13:27 am by deaftone |
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PI Plate Volts High
Started by fdesalvo |
6 Replies
3006 Views |
April 26, 2017, 03:41:14 pm by fdesalvo |
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50K trimpot wiring in JCM800
Started by SleepLess |
11 Replies
3886 Views |
April 26, 2017, 11:04:44 am by sluckey |
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7 Replies
3102 Views |
April 26, 2017, 07:40:30 am by ratgon |
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Tremolo intensity too deep or intense
Started by dude |
5 Replies
3088 Views |
April 25, 2017, 03:46:31 pm by kagliostro |
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5 Replies
3453 Views |
April 24, 2017, 08:28:50 pm by frpax |
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Hoffmann 5F6A bias circuit
Started by Bangy |
13 Replies
5662 Views |
April 24, 2017, 06:19:09 pm by Bangy |
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Amp blew fuse, now hummmmms. Bad caps?
Started by jeff |
20 Replies
6459 Views |
April 24, 2017, 02:02:23 pm by jeff |
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2 Replies
2200 Views |
April 24, 2017, 11:21:47 am by kagliostro |
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CMB. 70s Orange/Matamp clone
Started by chocopower |
19 Replies
7141 Views |
April 24, 2017, 07:43:40 am by chocopower |
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Bias Voltage Transformer
Started by J Rindt |
10 Replies
4552 Views |
April 23, 2017, 03:50:33 pm by J Rindt |
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HoSo56 Minimalist
Started by Deric |
4 Replies
3240 Views |
April 23, 2017, 02:33:49 pm by tubenit |
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16 Replies
8484 Views |
April 23, 2017, 01:56:55 pm by HotBluePlates |
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Homemade Orange Tiny Terror clone
Started by sarkipinty |
3 Replies
5778 Views |
April 23, 2017, 03:28:35 am by birt |
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16 Replies
7819 Views |
April 22, 2017, 02:57:07 pm by Sonny ReVerb |
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Amp construction methods
Started by fossilshark |
5 Replies
3832 Views |
April 21, 2017, 12:06:25 pm by Ed_Chambley |
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68 Super Reverb doing very strange things
Started by TerryD |
4 Replies
2431 Views |
April 21, 2017, 10:25:59 am by TerryD |
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30 Replies
9319 Views |
April 20, 2017, 12:15:16 pm by kagliostro |
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5879 tube examples
Started by tubenit |
19 Replies
12571 Views |
April 19, 2017, 09:38:10 pm by jojokeo |
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Ideal 12ax7 bias
Started by Colas LeGrippa |
12 Replies
7930 Views |
April 19, 2017, 06:45:25 pm by PRR |
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Stereo 5f2a build - TMB stack issue
Started by cusebassman |
19 Replies
6503 Views |
April 19, 2017, 06:16:02 pm by cusebassman |
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How do you check an output transformer
Started by TerryD |
7 Replies
3058 Views |
April 19, 2017, 05:06:47 pm by Bluemeany |
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Suggestions needed for new project
Started by frpax |
8 Replies
3410 Views |
April 19, 2017, 04:54:52 pm by SILVERGUN |
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New build eating power tubes
Started by GeorgeG |
24 Replies
6487 Views |
April 19, 2017, 01:59:00 pm by GeorgeG |
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13 Replies
4044 Views |
April 18, 2017, 12:13:44 pm by drgonzonm |
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MOVED: Davoli Krundal D8066 schematic ?
Started by Willabe |
0 Replies
2174 Views |
April 18, 2017, 08:47:10 am by Willabe |
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Hoffman 100W Plexi Power Supply Layout
Started by Ledzepp007 |
4 Replies
2656 Views |
April 17, 2017, 09:23:25 pm by sluckey |
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0 Replies
1916 Views |
April 17, 2017, 05:07:57 pm by Willabe |
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0 Replies
2196 Views |
April 17, 2017, 02:26:16 pm by Willabe |
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Help with Bias on a 68 Super Reverb
Started by TerryD |
4 Replies
2733 Views |
April 17, 2017, 10:00:45 am by TerryD |
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Adding a gain stage
Started by fossilshark |
21 Replies
12240 Views |
April 17, 2017, 08:13:01 am by Crate50watt |
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transformer help please
Started by jase128 |
4 Replies
2619 Views |
April 16, 2017, 06:11:56 pm by jase128 |
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Another go at this Tremolo.....
Started by TIMBO |
12 Replies
3436 Views |
April 16, 2017, 10:12:33 am by tubenit |
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23 Replies
6121 Views |
April 16, 2017, 09:08:35 am by jeff |
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EL34 tubes with 540v screen voltage
Started by chocopower |
34 Replies
12028 Views |
April 15, 2017, 08:16:10 pm by chocopower |
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Need more treble
Started by fossilshark |
4 Replies
2824 Views |
April 15, 2017, 04:02:05 pm by DummyLoad |
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5 Replies
8518 Views |
April 15, 2017, 01:10:53 am by smackoj |
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