Welcome To the Hoffman Amplifiers Forum
June 09, 2026, 12:51:35 am
Welcome To the Hoffman Amplifiers ForumJune 09, 2026, 12:51:35 am | ||
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Relay circuit & layout board & ft switch
Started by tubenit |
43 Replies
125230 Views |
February 23, 2026, 10:47:34 amby acheld |
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182 Replies
318274 Views |
February 16, 2026, 02:36:14 pm by Jesus Freak |
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162 Replies
268986 Views |
June 29, 2023, 10:31:14 am by jojokeo |
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54 Replies
136307 Views |
March 17, 2022, 04:47:19 am by catalin gramada |
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Wire Jacket Voltage post
Started by EL34 |
7 Replies
36389 Views |
February 21, 2022, 07:46:50 pm by shooter |
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53 Replies
100878 Views |
September 27, 2020, 10:23:28 pm by jojokeo |
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Trem-o-nator (Sluckey's)
Started by tubenit |
4 Replies
20846 Views |
August 14, 2020, 11:36:57 am by tubenit |
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8 Replies
50879 Views |
May 10, 2019, 06:10:18 am by tubenit |
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Mosfet cathode follower
Started by tubenit |
7 Replies
34748 Views |
May 02, 2019, 07:02:27 pm by sluckey |
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Master Volume
Started by NannerPuddin |
21 Replies
54643 Views |
March 13, 2019, 11:39:09 am by Papa Jim |
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VVR and cathode biased amps
Started by tubenit |
25 Replies
75857 Views |
May 18, 2018, 04:51:44 am by tubenit |
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Amp building steps and procedure
Started by tubenit |
1 Replies
26324 Views |
January 01, 2018, 11:34:14 pm by Raybob |
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Hoffman AB763 Tremolo 6L6 mods?
Started by bnwitt |
26 Replies
78815 Views |
December 20, 2017, 03:05:56 am by stringbender.dk |
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6 Replies
26997 Views |
June 08, 2017, 01:07:30 pm by tubenit |
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Tube spacing in chassis
Started by tubenit |
4 Replies
26578 Views |
July 26, 2016, 05:05:47 am by tubenit |
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How to trace out a circuit problem
Started by EL34 |
0 Replies
90803 Views |
June 15, 2005, 07:49:14 am by EL34 |
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zener diode trick to lower B+ volts
Started by tubenit |
16 Replies
49898 Views |
January 03, 2025, 02:44:52 pm by wdelaney72 |
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76 Replies
105177 Views |
June 02, 2023, 05:09:07 pm by passaloutre |
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Chassis plug fuses
Started by amitay3333 |
1 Replies
11116 Views |
May 14, 2023, 09:16:46 pm by acheld |
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Pentode - triode switch power tubes
Started by tubenit |
0 Replies
16363 Views |
March 02, 2023, 07:32:46 am by tubenit |
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(Archive) Frequently Asked Questions
Started by tbeck |
32 Replies
71104 Views |
October 05, 2021, 01:08:04 pm by sluckey |
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MOVED: Re: Adding 1-tube reverb
Started by tubenit |
0 Replies
19345 Views |
November 15, 2020, 03:48:48 pm by tubenit |
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6BM8 reverb (capacitor driven & other)
Started by tubenit |
9 Replies
20241 Views |
September 15, 2019, 03:04:55 pm by DummyLoad |
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Hoffman Plexi 50W Grid Stoppers on V1
Started by mike123 |
5 Replies
18255 Views |
September 03, 2017, 08:37:48 pm by mike123 |
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Control Panel Template - SmartDraw
Started by purpletele |
13 Replies
24514 Views |
June 01, 2017, 11:14:52 am by purpletele |
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4 knob tone stack
Started by tubenit |
12 Replies
28722 Views |
October 19, 2016, 09:00:53 am by kagliostro |
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5E3 with Choke Voltage Chart
Started by EL34 |
6 Replies
83933 Views |
August 06, 2016, 10:09:13 pm by super&plexi |
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Fender face plates
Started by bassmoe |
2 Replies
21175 Views |
April 08, 2016, 04:23:39 pm by MoparWade |
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(Archive) Coupling Capacitors
Started by radar01 |
11 Replies
57777 Views |
March 16, 2015, 09:19:43 am by Voxbox |
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6V6 to 6BM8 or EL84 socket adaptor
Started by tubenit |
5 Replies
20492 Views |
April 04, 2014, 11:29:49 am by jojokeo |
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90 Replies
132298 Views |
March 01, 2014, 01:25:39 pm by kagliostro |
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figuring approx. output wattage
Started by phsyconoodler |
13 Replies
34737 Views |
August 29, 2013, 01:35:21 pm by LHPcope |
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13 Replies
27023 Views |
September 03, 2012, 10:19:02 am by EL34 |
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space between turrets
Started by richierick |
15 Replies
30528 Views |
March 20, 2008, 06:14:10 am by EL34 |
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*umbolt lite done.
Started by phsyconoodler « 1 2 » |
82 Replies
74891 Views |
December 20, 2007, 02:26:48 pm by phsyconoodler |
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(Archive) REVIBE
Started by beatroot |
16 Replies
55121 Views |
October 25, 2007, 04:16:47 pm by EL34 |
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115 Replies
130855 Views |
February 25, 2007, 04:09:23 am by Geezer |
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Choke input filters
Started by Geezer |
14 Replies
60657 Views |
December 12, 2006, 09:57:15 am by jjasilli |
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10 Replies
50661 Views |
January 24, 2006, 06:30:12 pm by BriteLite |
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Board Members- Equipment / Influences
Started by EL34 |
0 Replies
75929 Views |
June 15, 2005, 09:22:45 am by EL34 |
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A question for PHAT amps
Started by EL34 |
0 Replies
77417 Views |
June 15, 2005, 07:58:41 am by EL34 |
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Nice Marshall Circuits link
Started by EL34 |
0 Replies
78621 Views |
June 15, 2005, 07:57:22 am by EL34 |
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0 Replies
79891 Views |
June 15, 2005, 07:56:39 am by EL34 |
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Phase Inverter Questions
Started by EL34 |
0 Replies
77247 Views |
June 15, 2005, 07:55:59 am by EL34 |
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output impedance
Started by EL34 |
0 Replies
82148 Views |
June 15, 2005, 07:55:19 am by EL34 |
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5E3 6L6 conversion suggested OT??
Started by EL34 |
0 Replies
80523 Views |
June 15, 2005, 07:54:37 am by EL34 |
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0 Replies
80198 Views |
June 15, 2005, 07:53:53 am by EL34 |
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Modded phase inverter is motorboating
Started by EL34 |
0 Replies
80281 Views |
June 15, 2005, 07:52:19 am by EL34 |
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100 ohm resister vs heater center tap
Started by EL34 |
0 Replies
81822 Views |
June 15, 2005, 07:50:56 am by EL34 |
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0 Replies
82965 Views |
June 15, 2005, 07:49:57 am by EL34 |
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