Welcome To the Hoffman Amplifiers Forum
April 28, 2026, 04:02:37 pm
Welcome To the Hoffman Amplifiers ForumApril 28, 2026, 04:02:37 pm | ||
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dumb question of the day
Started by phsyconoodler |
3 Replies
4827 Views |
October 19, 2010, 06:34:13 pmby phsyconoodler |
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2 Replies
4611 Views |
October 19, 2010, 12:33:50 pm by tubeswell |
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MOVED: tube effects loop on board
Started by tubenit |
0 Replies
4029 Views |
October 19, 2010, 05:34:53 am by tubenit |
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Princeton Reverb - PI Distortion?
Started by Fresh_Start |
16 Replies
14365 Views |
October 18, 2010, 10:22:08 pm by Fresh_Start |
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Revibe Board
Started by GrungeMan |
5 Replies
5476 Views |
October 18, 2010, 06:06:50 pm by GrungeMan |
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12AX7 and 12AY7 12 volt heater
Started by 67polara |
10 Replies
8865 Views |
October 18, 2010, 03:25:07 pm by HotBluePlates |
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BOGNER ALCHEMIST/ Thermal PT Fuse
Started by plexi50 |
8 Replies
8028 Views |
October 18, 2010, 01:58:52 pm by plexi50 |
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No Vibrato 1977 Twin Reverb / UPDATE:
Started by plexi50 |
6 Replies
5457 Views |
October 17, 2010, 09:13:20 pm by duke of earl |
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regulated 12vdc on 6vac heaters?
Started by rdrgtr |
9 Replies
13479 Views |
October 17, 2010, 09:37:45 am by LooseChange |
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Which 12AX7?
Started by knotscott |
3 Replies
4573 Views |
October 16, 2010, 03:33:09 pm by zendragon63 |
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Low output on 5E3
Started by allaboutone |
4 Replies
4768 Views |
October 16, 2010, 02:01:12 pm by mresistor |
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PT primary confusion
Started by dynaman1 |
2 Replies
4291 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
9809 Views |
October 15, 2010, 03:54:09 pm by FYL |
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12 Replies
24361 Views |
October 15, 2010, 03:46:59 pm by tubeswell |
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9 Replies
6805 Views |
October 15, 2010, 10:21:22 am by Tone Junkie |
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Power Transformer Question
Started by TIMBO |
0 Replies
4090 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
15896 Views |
October 14, 2010, 03:23:37 pm by phsyconoodler |
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25 Replies
15931 Views |
October 14, 2010, 01:28:23 pm by eleventeen |
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New amp, retro style
Started by Madison |
14 Replies
7434 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
5657 Views |
October 13, 2010, 07:15:21 pm by zfiles1701 |
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1N4007 vrs. UF4007 fast diode
Started by rdrgtr |
9 Replies
33217 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
8327 Views |
October 13, 2010, 02:12:45 am by SleepLess |
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Substitute 6V6s for 6L6s?
Started by firemedic |
5 Replies
5729 Views |
October 12, 2010, 10:03:24 pm by Tiny_Daddy |
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24 Replies
14646 Views |
October 12, 2010, 08:50:12 pm by woolly |
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Reverb Problem 1977 Twin Reverb
Started by plexi50 |
2 Replies
3765 Views |
October 12, 2010, 03:55:33 pm by plexi50 |
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11 Replies
5949 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
4511 Views |
October 12, 2010, 08:17:56 am by Bub |
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6 Replies
6161 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
5171 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
11580 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
6192 Views |
October 10, 2010, 02:47:03 pm by eleventeen |
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18 Replies
9261 Views |
October 09, 2010, 07:09:02 pm by jeff |
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Firefly Clone Build
Started by shortfuse |
38 Replies
21780 Views |
October 09, 2010, 06:01:29 pm by shortfuse |
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GZ37 max capacitance?
Started by firemedic |
5 Replies
7070 Views |
October 09, 2010, 03:15:18 pm by firemedic |
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4 Replies
9417 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
3929 Views |
October 09, 2010, 11:02:17 am by sluckey |
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zener diodes for voltage drop
Started by rdrgtr |
4 Replies
7408 Views |
October 09, 2010, 09:02:29 am by Fresh_Start |
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Improving a Deluxe Reverb
Started by fiftynine |
19 Replies
14311 Views |
October 09, 2010, 08:39:15 am by alerich |
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Feedback question...
Started by Ritchie200 |
1 Replies
3457 Views |
October 09, 2010, 06:18:07 am by Geezer |
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Troubleshooting SE homebuilt amp
Started by Twangmaster |
11 Replies
6693 Views |
October 08, 2010, 10:34:13 pm by Twangmaster |
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Mars OD special "idea"
Started by tubenit |
2 Replies
4120 Views |
October 08, 2010, 08:26:13 pm by 67polara |
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Blues Jr - Odd Topology
Started by Fresh_Start |
7 Replies
6631 Views |
October 08, 2010, 07:10:30 pm by jjasilli |
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Hammond Universal 125d OT
Started by TIMBO |
7 Replies
6554 Views |
October 08, 2010, 03:09:23 pm by TIMBO |
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5E3/5G9 Hotswitch mod
Started by deqqed |
4 Replies
4620 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
7273 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
6495 Views |
October 08, 2010, 08:29:59 am by FYL |
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Sovtek vs. Electro-Harmonix 12AX7
Started by panhead |
14 Replies
21751 Views |
October 08, 2010, 06:26:34 am by bluesbear |
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100Rs for heater artificial CT ?
Started by Madison |
15 Replies
11387 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
5942 Views |
October 07, 2010, 11:25:29 pm by eleventeen |
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12AX7 With no Glow?
Started by Platefire |
2 Replies
4390 Views |
October 07, 2010, 11:22:11 pm by Platefire |
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