Welcome To the Hoffman Amplifiers Forum
January 24, 2026, 08:54:16 pm
Welcome To the Hoffman Amplifiers ForumJanuary 24, 2026, 08:54:16 pm | ||
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| rafe and 41 Guests are viewing this board. | ||||
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regulated 12vdc on 6vac heaters?
Started by rdrgtr |
9 Replies
12603 Views |
October 17, 2010, 09:37:45 amby LooseChange |
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Which 12AX7?
Started by knotscott |
3 Replies
3868 Views |
October 16, 2010, 03:33:09 pm by zendragon63 |
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Low output on 5E3
Started by allaboutone |
4 Replies
4004 Views |
October 16, 2010, 02:01:12 pm by mresistor |
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PT primary confusion
Started by dynaman1 |
2 Replies
3534 Views |
October 16, 2010, 10:59:03 am by dynaman1 |
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5F6-A decopling and main filter stage
Started by Bub |
15 Replies
8924 Views |
October 15, 2010, 03:54:09 pm by FYL |
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12 Replies
23091 Views |
October 15, 2010, 03:46:59 pm by tubeswell |
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9 Replies
6113 Views |
October 15, 2010, 10:21:22 am by Tone Junkie |
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Power Transformer Question
Started by TIMBO |
0 Replies
3413 Views |
October 15, 2010, 03:23:32 am by TIMBO |
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Help with 100 watt Marshall 2210 PT
Started by chabby-ao |
30 Replies
14271 Views |
October 14, 2010, 03:23:37 pm by phsyconoodler |
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25 Replies
14165 Views |
October 14, 2010, 01:28:23 pm by eleventeen |
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New amp, retro style
Started by Madison |
14 Replies
6424 Views |
October 13, 2010, 09:45:40 pm by billcreller |
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Schematic for AB 763 foot switches?
Started by zfiles1701 |
8 Replies
4941 Views |
October 13, 2010, 07:15:21 pm by zfiles1701 |
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1N4007 vrs. UF4007 fast diode
Started by rdrgtr |
9 Replies
32090 Views |
October 13, 2010, 06:43:59 am by FYL |
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Tremolo not working anymore on SR...
Started by SleepLess |
13 Replies
7331 Views |
October 13, 2010, 02:12:45 am by SleepLess |
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Substitute 6V6s for 6L6s?
Started by firemedic |
5 Replies
4926 Views |
October 12, 2010, 10:03:24 pm by Tiny_Daddy |
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24 Replies
13447 Views |
October 12, 2010, 08:50:12 pm by woolly |
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Reverb Problem 1977 Twin Reverb
Started by plexi50 |
2 Replies
3169 Views |
October 12, 2010, 03:55:33 pm by plexi50 |
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11 Replies
5211 Views |
October 12, 2010, 02:43:15 pm by musicfixerupper |
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Build #2 5F6-A PT and OT options
Started by Bub |
3 Replies
3860 Views |
October 12, 2010, 08:17:56 am by Bub |
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6 Replies
5433 Views |
October 11, 2010, 04:46:42 pm by G._Hoffman |
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I need a great harp amp design
Started by 67polara |
4 Replies
4370 Views |
October 11, 2010, 11:22:24 am by bigdaddy |
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linear pots and audio taper pots
Started by 67polara |
10 Replies
10683 Views |
October 11, 2010, 09:30:09 am by simonallaway |
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filter cap value for tube rectifier
Started by rdrgtr |
8 Replies
5466 Views |
October 10, 2010, 02:47:03 pm by eleventeen |
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18 Replies
8335 Views |
October 09, 2010, 07:09:02 pm by jeff |
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Firefly Clone Build
Started by shortfuse |
38 Replies
19932 Views |
October 09, 2010, 06:01:29 pm by shortfuse |
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GZ37 max capacitance?
Started by firemedic |
5 Replies
6217 Views |
October 09, 2010, 03:15:18 pm by firemedic |
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4 Replies
8558 Views |
October 09, 2010, 01:19:28 pm by eleventeen |
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Phase shift between preamp and PI?
Started by chip |
1 Replies
3334 Views |
October 09, 2010, 11:02:17 am by sluckey |
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zener diodes for voltage drop
Started by rdrgtr |
4 Replies
6571 Views |
October 09, 2010, 09:02:29 am by Fresh_Start |
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Improving a Deluxe Reverb
Started by fiftynine |
19 Replies
13349 Views |
October 09, 2010, 08:39:15 am by alerich |
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Feedback question...
Started by Ritchie200 |
1 Replies
2943 Views |
October 09, 2010, 06:18:07 am by Geezer |
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Troubleshooting SE homebuilt amp
Started by Twangmaster |
11 Replies
5876 Views |
October 08, 2010, 10:34:13 pm by Twangmaster |
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Mars OD special "idea"
Started by tubenit |
2 Replies
3493 Views |
October 08, 2010, 08:26:13 pm by 67polara |
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Blues Jr - Odd Topology
Started by Fresh_Start |
7 Replies
5979 Views |
October 08, 2010, 07:10:30 pm by jjasilli |
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Hammond Universal 125d OT
Started by TIMBO |
7 Replies
5854 Views |
October 08, 2010, 03:09:23 pm by TIMBO |
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5E3/5G9 Hotswitch mod
Started by deqqed |
4 Replies
3960 Views |
October 08, 2010, 01:36:16 pm by topbrent |
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Where have all the 6550's gone?
Started by bigsbybender |
12 Replies
6504 Views |
October 08, 2010, 11:24:25 am by simonallaway |
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data sheet for EH 7591 power tube
Started by punkykatt |
5 Replies
5826 Views |
October 08, 2010, 08:29:59 am by FYL |
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Sovtek vs. Electro-Harmonix 12AX7
Started by panhead |
14 Replies
20755 Views |
October 08, 2010, 06:26:34 am by bluesbear |
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100Rs for heater artificial CT ?
Started by Madison |
15 Replies
10108 Views |
October 08, 2010, 12:34:38 am by The_Gaz |
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Ampeg V2 No Filiment Light
Started by plexi50 |
7 Replies
5252 Views |
October 07, 2010, 11:25:29 pm by eleventeen |
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12AX7 With no Glow?
Started by Platefire |
2 Replies
3860 Views |
October 07, 2010, 11:22:11 pm by Platefire |
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5 Replies
5576 Views |
October 07, 2010, 05:46:49 pm by LooseChange |
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twin reverb, power tube current, etc.
Started by CraigB |
6 Replies
4222 Views |
October 07, 2010, 02:01:21 pm by mresistor |
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8 Replies
5449 Views |
October 07, 2010, 12:36:52 pm by PRR |
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Lar mar master
Started by phsyconoodler |
12 Replies
6883 Views |
October 07, 2010, 10:23:05 am by phsyconoodler |
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5 Replies
4131 Views |
October 07, 2010, 09:55:03 am by Tone Junkie |
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11 Replies
5429 Views |
October 07, 2010, 03:26:26 am by tubeswell |
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13 Replies
7338 Views |
October 06, 2010, 09:20:06 pm by Fresh_Start |
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New 5f1 build squeals
Started by mpryor224 |
19 Replies
12131 Views |
October 06, 2010, 01:31:50 pm by stingray_65 |
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