Welcome To the Hoffman Amplifiers ForumOctober 24, 2025, 05:17:01 am | ||
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5E7 low volume... numbers posted...
Started by Geezer |
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3954 Views |
by Geezer |
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3370 Views |
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8 pin tube socket adapter ?
Started by Geezer |
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3560 Views |
by Geezer |
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DC stand off heaters?
Started by Geezer |
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3732 Views |
by Geezer |
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Fender Deluxe P/T Wiring
Started by Geezer |
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3427 Views |
by Geezer |
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Add Effects loop to Doug's AB763 board
Started by Geezer |
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4255 Views |
by Geezer |
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What is the purpose of a cathode follower?
Started by Geezer |
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4741 Views |
by Geezer |
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Aluminum Chassis
Started by Geezer |
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5232 Views |
by Geezer |
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help please
Started by Geezer |
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3615 Views |
by Geezer |
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speaker magnet - power tube distance
Started by Geezer |
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3534 Views |
by Geezer |
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speaker impedances affecting tone?
Started by Geezer |
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3578 Views |
by Geezer |
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BF Showman 6v6's conversion?
Started by Geezer |
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4301 Views |
by Geezer |
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can't get the bias negative enough
Started by Geezer |
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3710 Views |
by Geezer |
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3475 Views |
by Geezer |
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Extension speaker jack wiring
Started by Geezer |
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4184 Views |
by Geezer |
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Microphonic output tubes?
Started by Geezer |
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3603 Views |
by Geezer |
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Blonde Bassman Power Sag.
Started by Geezer |
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4145 Views |
by Geezer |
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Power transformer interference
Started by Geezer |
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3887 Views |
by Geezer |
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PI questions.....
Started by Geezer |
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3425 Views |
by Geezer |
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0 Replies
3688 Views |
by Geezer |
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Heater max voltage
Started by Geezer |
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3801 Views |
by Geezer |
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0 Replies
3753 Views |
by Geezer |
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Groove Tube Substitube?
Started by Geezer |
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4147 Views |
by Geezer |
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About preamp gain
Started by Geezer |
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3780 Views |
by Geezer |
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hum resolved
Started by Geezer |
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4407 Views |
by Geezer |
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old orange drops
Started by Geezer |
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3796 Views |
by Geezer |
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Pin voltages for 100 watt Plexi &nbs
Started by Geezer |
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5441 Views |
by Geezer |
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OT that Doug used to sell
Started by Geezer |
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3940 Views |
by Geezer |
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Inconsistent/ up and down B+
Started by Geezer |
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4215 Views |
by Geezer |
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0 Replies
4218 Views |
by Geezer |
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Master volume in a Princeton aa964
Started by Geezer |
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5313 Views |
by Geezer |
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oscillation/snubbers&PI
Started by Geezer |
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3926 Views |
by Geezer |
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Output Transformer 1750 ohms
Started by Geezer |
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3807 Views |
by Geezer |
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regulated DC heater circuit
Started by Geezer |
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4352 Views |
by Geezer |
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The need for Heat
Started by Geezer |
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3822 Views |
by Geezer |
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Preffered Bias Method
Started by Geezer |
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4382 Views |
by Geezer |
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Bassman 6L6 to EL34 conversion...
Started by Geezer |
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7583 Views |
by Geezer |
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5E3 Hum and transformer mounting
Started by Geezer |
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4957 Views |
by Geezer |
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4818 Views |
by Geezer |
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Revibe Tank Impedance Tweak?
Started by Geezer |
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4132 Views |
by Geezer |
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Checking a cap can/anyone use the JJ?
Started by Geezer |
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4972 Views |
by Geezer |
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4260 Views |
by Geezer |
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tube question
Started by Geezer |
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4316 Views |
by Geezer |
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Output transformer troubleshooting
Started by Geezer |
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6358 Views |
by Geezer |
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5E8A vs. 5F6A
Started by Geezer |
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6885 Views |
by Geezer |
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Home Brew Fender PS 400
Started by Geezer |
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5850 Views |
by Geezer |
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Fender Bassman 100 chassis layout
Started by Geezer |
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6226 Views |
by Geezer |
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0 Replies
3977 Views |
by Geezer |
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What causes hum ?
Started by Geezer |
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4307 Views |
by Geezer |
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grid stoppers?
Started by Geezer |
0 Replies
4519 Views |
by Geezer |
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