Welcome To the Hoffman Amplifiers ForumApril 25, 2026, 10:29:07 pm | ||
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Harmony H303 Hum and Static
Started by scstill |
18 Replies
6206 Views |
by PRR |
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5Y3GT Filter capacitor
Started by dude |
13 Replies
6967 Views |
by MrBreeze |
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Univox U1000 repair/modification help
Started by Lucaswaggle |
19 Replies
8020 Views |
by PRR |
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Output transformer & choke location
Started by MrBreeze |
4 Replies
3677 Views |
by dude |
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EH-150/185 build complete
Started by Jerry garrcia |
1 Replies
2960 Views |
by bmccowan |
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37 Replies
9688 Views |
by Williamblake |
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x
Started by fenderguy81 |
10 Replies
3832 Views |
by Latole |
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Help with Supro 1960T
Started by Travis8 |
9 Replies
4081 Views |
by sluckey |
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29 Replies
8482 Views |
by Apexelectric |
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6 Replies
4249 Views |
by tubeswell |
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7 Replies
4101 Views |
by pdf64 |
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Need reverb jack advice
Started by Lectroid |
11 Replies
5127 Views |
by Lectroid |
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V1 triodes question
Started by joesatch |
8 Replies
4234 Views |
by thetragichero |
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PSA preamp tubes
Started by joesatch |
12 Replies
4337 Views |
by pullshocks |
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15 Replies
10559 Views |
by tmknight |
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14 Replies
5602 Views |
by Platefire |
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6g4 Super Clone (mostly done)
Started by owen |
46 Replies
13716 Views |
by owen |
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Simplify or remove tonestack?
Started by joesatch |
7 Replies
4038 Views |
by jordan86 |
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Lamington Reverb… a little more volume?
Started by chris s |
16 Replies
6907 Views |
by chris s |
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HRD Preamp Plate Voltages - SOLVED
Started by bbmade |
7 Replies
3797 Views |
by bbmade |
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Use of relay on input?
Started by joesatch |
8 Replies
4347 Views |
by sluckey |
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Troubleshooting noisy reverb
Started by winterturtle |
5 Replies
3436 Views |
by tubeswell |
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preamp layout with triodes
Started by joesatch |
3 Replies
2700 Views |
by joesatch |
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3 Replies
3223 Views |
by BlackCrowe604 |
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Crate Stealth 50 power issue
Started by navdave |
6 Replies
4006 Views |
by navdave |
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Rob Robinette's bias calculator
Started by dude |
14 Replies
7096 Views |
by PRR |
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Negative Feedback Causing Oscillation?
Started by AHeck |
19 Replies
8349 Views |
by AHeck |
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Coupling caps 400v
Started by joesatch |
24 Replies
8097 Views |
by sluckey |
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Speaker for 5E3 Kit?
Started by bbmade |
11 Replies
5015 Views |
by JB |
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18 Replies
6153 Views |
by kagliostro |
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Examples of high voltage relay
Started by CascoSieg |
5 Replies
3682 Views |
by DummyLoad |
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Dual 50 Amp
Started by Big_Mike |
6 Replies
4474 Views |
by Apexelectric |
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Supro 1688TN Power Section
Started by Vez |
12 Replies
5033 Views |
by bmccowan |
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IEC connector location
Started by MrBreeze |
4 Replies
3600 Views |
by MrBreeze |
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Chassis Material preferences
Started by MrBreeze |
11 Replies
4833 Views |
by sluckey |
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29 Replies
8974 Views |
by HotBluePlates |
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Electronics theory question
Started by nandrewjackson |
9 Replies
5376 Views |
by shooter |
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59 Replies
22380 Views |
by cspar |
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preamp cathodes to ground location
Started by joesatch |
3 Replies
3563 Views |
by tubeswell |
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Average Screen Current
Started by HotBluePlates |
17 Replies
9920 Views |
by DuaneOh |
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Where to insert Standby Switch?
Started by winterturtle |
4 Replies
4397 Views |
by winterturtle |
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31 Replies
9587 Views |
by winterturtle |
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Eliminating RobRob's Hum balance ckt.
Started by JustMike |
1 Replies
3060 Views |
by sluckey |
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8 Replies
5549 Views |
by HotBluePlates |
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1965 Kay 703C - OT replacement questions
Started by Carlsoti |
6 Replies
4018 Views |
by PRR |
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Schematic question
Started by Vil |
7 Replies
4027 Views |
by sluckey |
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Sluckey matchless board
Started by ok_state_blues |
4 Replies
3818 Views |
by ok_state_blues |
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Blackstar HT-20R
Started by EL34 |
8 Replies
5597 Views |
by rake |
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Gibson GA-5 build - good till 9.5
Started by Keyboy |
5 Replies
4781 Views |
by ShoemanGB |
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3 Replies
3767 Views |
by sluckey |
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