Welcome To the Hoffman Amplifiers Forum
January 23, 2026, 05:58:51 pm
Welcome To the Hoffman Amplifiers ForumJanuary 23, 2026, 05:58:51 pm | ||
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| astronomicum and 109 Guests are viewing this board. | ||||
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7 Replies
2381 Views |
September 12, 2025, 12:20:54 pmby Bash |
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Switching cap across plate resistor
Started by Sonny ReVerb |
2 Replies
2110 Views |
September 12, 2025, 06:58:43 am by Sonny ReVerb |
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4 Replies
1863 Views |
September 11, 2025, 05:06:09 pm by mxrshiver |
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4 Replies
1858 Views |
September 10, 2025, 06:13:05 am by kagliostro |
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48 Replies
11387 Views |
September 10, 2025, 04:12:11 am by tubeswell |
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4 Replies
1651 Views |
September 09, 2025, 11:36:10 am by wsscott |
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one-tube-reverbers
Started by Bieworm |
2 Replies
1750 Views |
September 09, 2025, 04:57:07 am by tubenit |
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5 Replies
2201 Views |
September 07, 2025, 01:54:48 pm by Lectroid |
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5879 tube data sheet question
Started by tubenit |
5 Replies
2426 Views |
September 06, 2025, 12:31:01 pm by DummyLoad |
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192 Replies
33036 Views |
September 05, 2025, 02:58:10 pm by wsscott |
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Bias Wiggle Tremolo with 7591?
Started by dwinstonwood |
4 Replies
1703 Views |
September 04, 2025, 12:49:55 pm by dwinstonwood |
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Hiwatt DR103 FX loop
Started by SoundCity85 |
37 Replies
15274 Views |
September 03, 2025, 03:43:24 pm by wavley |
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3 Replies
1847 Views |
September 03, 2025, 11:35:42 am by Bieworm |
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25 Replies
4659 Views |
September 02, 2025, 06:20:08 am by Merlin |
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Reverb Tone Shifting with Dwell knob
Started by Lectroid |
14 Replies
3749 Views |
September 01, 2025, 02:48:23 pm by stratomaster |
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Hum in 5E3
Started by FREYES_7 |
11 Replies
2794 Views |
September 01, 2025, 02:33:58 pm by mresistor |
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Pre-Amp Anode Voltage Ibanez Thermion
Started by philschl |
3 Replies
1471 Views |
September 01, 2025, 06:14:17 am by philschl |
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63 Replies
15914 Views |
September 01, 2025, 01:52:26 am by Avraxas |
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19 Replies
2977 Views |
September 01, 2025, 01:25:45 am by Grantorino |
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What is this, a local NFB ??
Started by kagliostro |
4 Replies
1308 Views |
August 31, 2025, 10:40:26 am by kagliostro |
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18 Replies
3480 Views |
August 30, 2025, 08:26:31 pm by TIMBO |
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Resistor identification
Started by 1Ab |
21 Replies
4051 Views |
August 30, 2025, 01:30:46 pm by 1Ab |
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5 Replies
1870 Views |
August 29, 2025, 10:20:06 pm by stratomaster |
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Cathodyne bias problem
Started by scstill |
2 Replies
1324 Views |
August 28, 2025, 05:04:06 pm by scstill |
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15 Replies
2738 Views |
August 28, 2025, 09:41:21 am by Willabe |
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20 Replies
5715 Views |
August 28, 2025, 03:33:36 am by tubeswell |
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22 Replies
2864 Views |
August 27, 2025, 01:24:10 pm by Platefire |
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HR DeVille number two.
Started by Bluebark |
20 Replies
3075 Views |
August 27, 2025, 09:11:53 am by Bluebark |
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Sound City 120 is in a bad way
Started by Williamblake |
49 Replies
16458 Views |
August 26, 2025, 02:56:11 pm by Williamblake |
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12AZ7 as DC Cathode Follower?
Started by dwinstonwood |
3 Replies
1135 Views |
August 26, 2025, 11:32:16 am by tubeswell |
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Fender Bassman AC568 issue
Started by retrorod |
8 Replies
1657 Views |
August 26, 2025, 05:54:29 am by retrorod |
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Mic Preamp Power Supply Questions
Started by Jonas |
6 Replies
1751 Views |
August 25, 2025, 06:58:50 pm by Jonas |
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33 Replies
15224 Views |
August 25, 2025, 04:42:10 pm by tubeswell |
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Bugera 333XL-212 power amp stage problem
Started by Carlito |
6 Replies
1855 Views |
August 25, 2025, 09:59:29 am by scstill |
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Stand-Alone 5V/3A Filament TX W/CT
Started by dwinstonwood |
4 Replies
1297 Views |
August 22, 2025, 02:04:10 pm by dwinstonwood |
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19 Replies
3190 Views |
August 21, 2025, 06:00:30 pm by wsscott |
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8 Replies
1976 Views |
August 21, 2025, 04:36:49 pm by Merlin |
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So I tried the Hybrid Tube/SS rectifier...
Started by Nathan |
4 Replies
1491 Views |
August 20, 2025, 09:58:43 am by Nathan |
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4 Replies
1287 Views |
August 20, 2025, 05:11:11 am by HotBluePlates |
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Bias high voltage on HR Deville
Started by Bluebark |
8 Replies
1522 Views |
August 19, 2025, 12:14:44 pm by shooter |
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Vvr and bias switching
Started by Mike-p |
6 Replies
1463 Views |
August 18, 2025, 05:48:05 pm by Mike-p |
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"popping" Fender Twin Amp '57
Started by Sansteeth |
16 Replies
3654 Views |
August 18, 2025, 07:23:05 am by Sansteeth |
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70's Italian amp "Sound Big 10" schematic?
Started by JvR |
19 Replies
5775 Views |
August 16, 2025, 12:31:03 am by isaac_teller |
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APD-8025H Color Codes
Started by Richs1979 |
8 Replies
1872 Views |
August 15, 2025, 09:15:48 pm by Richs1979 |
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12 Replies
2458 Views |
August 15, 2025, 04:19:55 pm by DummyLoad |
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New Hoffman Plexi build
Started by Richs1979 |
4 Replies
1393 Views |
August 12, 2025, 02:59:59 pm by Richs1979 |
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Soldano / Rosamp SLO50 / 50W Amp Build
Started by RoadShow |
3 Replies
1460 Views |
August 12, 2025, 01:25:12 pm by chaohore |
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DIY Brownface faceplate work
Started by bullkelp |
4 Replies
1497 Views |
August 11, 2025, 09:27:30 am by rake |
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103 Replies
27482 Views |
August 10, 2025, 10:00:30 pm by uki |
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5 Replies
1608 Views |
August 10, 2025, 03:34:46 pm by dragonbat13 |
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