Welcome To the Hoffman Amplifiers ForumJanuary 24, 2026, 05:20:11 am | ||
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V1 triodes question
Started by joesatch |
8 Replies
3602 Views |
by thetragichero |
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PSA preamp tubes
Started by joesatch |
12 Replies
3718 Views |
by pullshocks |
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15 Replies
9637 Views |
by tmknight |
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14 Replies
4887 Views |
by Platefire |
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6g4 Super Clone (mostly done)
Started by owen |
46 Replies
11969 Views |
by owen |
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Simplify or remove tonestack?
Started by joesatch |
7 Replies
3440 Views |
by jordan86 |
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Lamington Reverb… a little more volume?
Started by chris s |
16 Replies
6005 Views |
by chris s |
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HRD Preamp Plate Voltages - SOLVED
Started by bbmade |
7 Replies
3238 Views |
by bbmade |
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Use of relay on input?
Started by joesatch |
8 Replies
3774 Views |
by sluckey |
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Troubleshooting noisy reverb
Started by winterturtle |
5 Replies
2864 Views |
by tubeswell |
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preamp layout with triodes
Started by joesatch |
3 Replies
2249 Views |
by joesatch |
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3 Replies
2728 Views |
by BlackCrowe604 |
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Crate Stealth 50 power issue
Started by navdave |
6 Replies
3293 Views |
by navdave |
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Rob Robinette's bias calculator
Started by dude |
14 Replies
5874 Views |
by PRR |
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Negative Feedback Causing Oscillation?
Started by AHeck |
19 Replies
6987 Views |
by AHeck |
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Coupling caps 400v
Started by joesatch |
24 Replies
6900 Views |
by sluckey |
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Speaker for 5E3 Kit?
Started by bbmade |
11 Replies
4139 Views |
by JB |
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18 Replies
5244 Views |
by kagliostro |
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Examples of high voltage relay
Started by CascoSieg |
5 Replies
2947 Views |
by DummyLoad |
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Dual 50 Amp
Started by Big_Mike |
6 Replies
3579 Views |
by Apexelectric |
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Supro 1688TN Power Section
Started by Vez |
12 Replies
4204 Views |
by bmccowan |
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IEC connector location
Started by MrBreeze |
4 Replies
2803 Views |
by MrBreeze |
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Chassis Material preferences
Started by MrBreeze |
11 Replies
3872 Views |
by sluckey |
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29 Replies
7746 Views |
by HotBluePlates |
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Electronics theory question
Started by nandrewjackson |
9 Replies
4389 Views |
by shooter |
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59 Replies
19473 Views |
by cspar |
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preamp cathodes to ground location
Started by joesatch |
3 Replies
2701 Views |
by tubeswell |
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Average Screen Current
Started by HotBluePlates |
17 Replies
8223 Views |
by DuaneOh |
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Where to insert Standby Switch?
Started by winterturtle |
4 Replies
3505 Views |
by winterturtle |
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31 Replies
7956 Views |
by winterturtle |
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Eliminating RobRob's Hum balance ckt.
Started by JustMike |
1 Replies
2314 Views |
by sluckey |
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8 Replies
4432 Views |
by HotBluePlates |
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1965 Kay 703C - OT replacement questions
Started by Carlsoti |
6 Replies
3167 Views |
by PRR |
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Schematic question
Started by Vil |
7 Replies
3154 Views |
by sluckey |
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Sluckey matchless board
Started by ok_state_blues |
4 Replies
2955 Views |
by ok_state_blues |
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Blackstar HT-20R
Started by EL34 |
8 Replies
4712 Views |
by rake |
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Gibson GA-5 build - good till 9.5
Started by Keyboy |
5 Replies
3827 Views |
by ShoemanGB |
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3 Replies
2883 Views |
by sluckey |
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Using an External Cab for Fender '68 Custom Vibro Champ Reverb
Started by reginom72 |
4 Replies
3920 Views |
by PRR |
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12vdc heaters elevated?
Started by joesatch |
12 Replies
4195 Views |
by PRR |
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3 Replies
2916 Views |
by PRR |
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1974 Fender Twin Reverb (Master Volume) Circuit Question
Started by reginom72 |
0 Replies
2776 Views |
by reginom72 |
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5 Replies
3283 Views |
by kagliostro |
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Ampeg Gemini 1 OT identification
Started by ndross475 |
2 Replies
2616 Views |
by sluckey |
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diodes/rectifier switch
Started by isaac_teller |
8 Replies
3804 Views |
by isaac_teller |
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Vox AC15H1TV - Hum and channel bleed
Started by kristianf |
0 Replies
2843 Views |
by kristianf |
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Bias circuit question.
Started by joesatch |
4 Replies
3138 Views |
by nandrewjackson |
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20 Replies
6343 Views |
by pdf64 |
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AMPEG B15 issue
Started by Colas LeGrippa |
4 Replies
3036 Views |
by SoundmasterG |
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ECC83 issue, high voltage output
Started by hozone |
6 Replies
3355 Views |
by hozone |
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