Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 12:21:51 pm | ||
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20 Replies
2793 Views |
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How to identify rectifier tube
Started by punkykatt |
8 Replies
981 Views |
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Testing Output Transformers
Started by fossilshark |
9 Replies
1467 Views |
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21 Replies
2089 Views |
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1 Replies
737 Views |
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Diagnosing smell from NOS tubes
Started by shattered |
22 Replies
2584 Views |
![]() by passaloutre |
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Princeton clone reverb low output
Started by Lectroid |
13 Replies
1726 Views |
![]() by Willabe |
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cap to ground on mid pot?
Started by joesatch |
7 Replies
1309 Views |
![]() by Willabe |
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O-scope - When all else fails
Started by stratomaster |
7 Replies
1378 Views |
![]() by stratomaster |
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Single Channel 6G6
Started by sclinchy |
10 Replies
4731 Views |
![]() by jonathan_kea |
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18watt Cascade preamp layout
Started by distortionhead |
25 Replies
3691 Views |
![]() by distortionhead |
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Jet city custom 22
Started by Tone Junkie |
2 Replies
1189 Views |
![]() by Tone Junkie |
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TAD KT66 with loose base
Started by RoadShow |
9 Replies
1467 Views |
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70 Replies
8339 Views |
![]() by tubeswell |
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12 Replies
6452 Views |
![]() by tremdoctor |
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48 Replies
10204 Views |
![]() by Yeatzee |
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Bias current vs. voltage
Started by Lectroid |
8 Replies
1731 Views |
![]() by Lectroid |
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15 Replies
2313 Views |
![]() by B-Rex |
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6 Replies
1498 Views |
![]() by BlackCrowe604 |
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hot rod deluxe dumble pcb
Started by Mattjaco1 |
5 Replies
1729 Views |
![]() by Mattjaco1 |
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Bad reverb transformer? maybe the tank?
Started by KimboDb |
30 Replies
9313 Views |
![]() by tubeswell |
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Hammond 1140-LN-E Transformer
Started by exnihilfit |
5 Replies
1385 Views |
![]() by exnihilfit |
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4 Replies
1503 Views |
![]() by Lectroid |
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24 Replies
3320 Views |
![]() by Latole |
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18watt stout in AO35 chassis
Started by dmp |
18 Replies
3016 Views |
![]() by dmp |
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Bias circuit assistance.
Started by joesatch |
4 Replies
1089 Views |
![]() by tubeswell |
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4 Replies
1417 Views |
![]() by scstill |
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bias ground
Started by joesatch |
11 Replies
1993 Views |
![]() by pdf64 |
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Squeal in the 77 Pentode channel
Started by scstill |
5 Replies
1793 Views |
![]() by scstill |
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Robinette JCM 800 Bias Problem
Started by B-Rex |
8 Replies
1474 Views |
![]() by B-Rex |
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RF noise filtering
Started by phsyconoodler |
15 Replies
11318 Views |
![]() by scstill |
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20 Replies
3251 Views |
![]() by sec1rlr |
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PT Tap question
Started by joesatch |
1 Replies
1039 Views |
![]() by tubeswell |
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Hammond AO-44 conversion
Started by tubenit |
7 Replies
1704 Views |
![]() by tubenit |
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15 Replies
2994 Views |
![]() by wsscott |
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5E3 Kit - Bias Updated
Started by bbmade |
29 Replies
3595 Views |
![]() by bbmade |
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6g11 Vibrolux - fixing overdrive
Started by bullkelp |
7 Replies
1660 Views |
![]() by HotBluePlates |
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AC30C2 volume/gain pots do nothing.
Started by fossilshark |
6 Replies
1631 Views |
![]() by tubeswell |
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OT primary impedance for push-pull amp
Started by gontek |
19 Replies
2814 Views |
![]() by Merlin |
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Substitute a 5Y3 for a 5U4?
Started by Lectroid |
8 Replies
1817 Views |
![]() by Lectroid |
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rectify AC filament for DC on V1
Started by joesatch |
5 Replies
1745 Views |
![]() by Merlin |
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high octane push pull
Started by Beezerboy |
29 Replies
6440 Views |
![]() by JPK |
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Tweed ODS 5879 Load Line
Started by stevefmt |
1 Replies
1103 Views |
![]() by tubenit |
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3 Replies
1284 Views |
![]() by tubeswell |
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5F1 arc in tube 6V6
Started by FREYES_7 |
37 Replies
5674 Views |
![]() by FREYES_7 |
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help with channel debug. massive hiss
Started by joesatch |
8 Replies
1574 Views |
![]() by joesatch |
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Repairs - Peavey Windsor Studio
Started by Shrek |
6 Replies
1506 Views |
![]() by Shrek |
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Cathode resistor question
Started by Blooze |
8 Replies
1570 Views |
![]() by tubeswell |
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Project "scrap salvage"
Started by stw307 |
11 Replies
2682 Views |
![]() by stw307 |
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3 Replies
2868 Views |
![]() by filmdiary |
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