Welcome To the Hoffman Amplifiers ForumJanuary 23, 2026, 09:41:46 pm | ||
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3109 Views |
by Planobilly |
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1 Replies
2605 Views |
by sluckey |
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4 Replies
3010 Views |
by zephyrblau |
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Choke for 5f6a build
Started by Mypalmurph |
2 Replies
2787 Views |
by Mypalmurph |
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Reverb transformer grounding
Started by marshallguy |
5 Replies
3702 Views |
by marshallguy |
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Measuring V+(plate voltage)
Started by Champ_49 |
9 Replies
4042 Views |
by shooter |
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11 Replies
4250 Views |
by sluckey |
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15 Replies
6127 Views |
by mmack |
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EL34 vs 6L6 bias supply
Started by fossilshark |
2 Replies
3100 Views |
by PRR |
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5e3 circuit with 500k pots?
Started by roseblood11 |
7 Replies
4160 Views |
by roseblood11 |
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SVT with a 600 Ohm input
Started by pbman1953 |
4 Replies
3276 Views |
by pbman1953 |
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Attention Visio users!
Started by sluckey |
1 Replies
2646 Views |
by kagliostro |
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Grounding schemes
Started by marshallguy |
2 Replies
2642 Views |
by marshallguy |
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Amp startup issues - light bulb glowing
Started by jordan86 |
15 Replies
5227 Views |
by jordan86 |
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'68 AB763 Showman tremolo tick
Started by Esquirefreak |
0 Replies
2506 Views |
by Esquirefreak |
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Tremodrive Oscillator question
Started by TurboGuitarMelton |
5 Replies
4022 Views |
by PRR |
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power supply bias design
Started by fossilshark |
4 Replies
3091 Views |
by fossilshark |
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Mosfet reverb recovery
Started by Bieworm |
14 Replies
5229 Views |
by PRR |
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9 Replies
3911 Views |
by marshallguy |
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Multi amp switcher thing
Started by fossilshark |
9 Replies
4138 Views |
by fossilshark |
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Alembic F-2B To Line Level Out
Started by AHeck |
7 Replies
3777 Views |
by AHeck |
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FX series Loop design
Started by marshallguy |
11 Replies
4636 Views |
by sluckey |
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21 Replies
5802 Views |
by marshallguy |
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Presense and Resonance
Started by jim |
0 Replies
2304 Views |
by jim |
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Big problem with deluxe reverb 65
Started by Travis8 |
16 Replies
4518 Views |
by Latole |
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Using octal tube for a 'one tube' reverb
Started by smackoj |
40 Replies
12339 Views |
by Jerry garrcia |
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Variac tested
Started by Colas LeGrippa |
16 Replies
5166 Views |
by Colas LeGrippa |
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Two heater circuits - grounding both?
Started by cfortner |
2 Replies
2533 Views |
by cfortner |
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Restoring Old Power Transformer
Started by TurboGuitarMelton |
10 Replies
5299 Views |
by kagliostro |
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5 Replies
3893 Views |
by sluckey |
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filament wiring
Started by labb |
3 Replies
2931 Views |
by sluckey |
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3 Replies
3232 Views |
by kagliostro |
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Super reverb clone
Started by Rockranger |
10 Replies
4311 Views |
by Rockranger |
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3 Replies
3238 Views |
by HotBluePlates |
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TMB Stout with 6v6's
Started by Rixster909 |
0 Replies
2573 Views |
by Rixster909 |
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8 Replies
3719 Views |
by tdvt |
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Conrad Sundholm RIP
Started by SoundmasterG |
6 Replies
4056 Views |
by SoundmasterG |
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9 Replies
3918 Views |
by Opry Audio |
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preamp stage circuit analysis
Started by joesatch |
12 Replies
4268 Views |
by shooter |
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11 Replies
4293 Views |
by sluckey |
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ENGL Savage 120 low bias
Started by Travis8 |
35 Replies
9602 Views |
by Latole |
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Question for Tubnit
Started by Tone Junkie |
5 Replies
3394 Views |
by Tone Junkie |
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AB763 HISS on the Tremolo circuit
Started by CharacterZero |
8 Replies
4054 Views |
by sluckey |
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how to place the components?
Started by roseblood11 |
8 Replies
3529 Views |
by roseblood11 |
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Coupling cap switch options
Started by echuta13 |
5 Replies
4436 Views |
by roseblood11 |
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6 Replies
3668 Views |
by cfortner |
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6 Replies
3642 Views |
by RoadShow |
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Dropping voltage BEFORE rectifier tube?
Started by Duncan |
8 Replies
3826 Views |
by kagliostro |
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133 Replies
23165 Views |
by Platefire |
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In which class works the Hiwatt 400W ?
Started by kagliostro |
10 Replies
4870 Views |
by cfortner |
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