Welcome To the Hoffman Amplifiers Forum
December 08, 2025, 10:39:37 am
Welcome To the Hoffman Amplifiers ForumDecember 08, 2025, 10:39:37 am | ||
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6 Replies
2550 Views |
March 05, 2024, 01:08:32 pmby PRR |
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6DN3 vs 6CJ3 - interchangeable?
Started by kasperbergholt |
1 Replies
2214 Views |
March 05, 2024, 11:39:05 am by kasperbergholt |
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Mullard 3-3 is not amazing
Started by jewishjay |
6 Replies
3175 Views |
March 04, 2024, 08:05:31 pm by glass54 |
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100 Replies
15089 Views |
March 03, 2024, 06:43:25 pm by wsscott |
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8 Replies
3012 Views |
March 03, 2024, 05:48:10 pm by dude |
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record-O-Phone Reel to Reel. Any Ideas?
Started by silat |
10 Replies
3095 Views |
March 03, 2024, 11:14:29 am by silat |
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10 Replies
3697 Views |
March 03, 2024, 06:16:30 am by HotBluePlates |
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Reuse PT and OT for very different build?
Started by Erik Aa |
10 Replies
3182 Views |
March 02, 2024, 06:42:13 pm by HotBluePlates |
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0 Replies
1868 Views |
March 02, 2024, 11:36:13 am by sciurian |
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Installing a 3 prong wire & plug
Started by pbman1953 |
11 Replies
3850 Views |
February 29, 2024, 08:58:32 pm by WimWalther |
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Cathode follower question
Started by J Rindt |
6 Replies
2553 Views |
February 29, 2024, 04:17:13 pm by HotBluePlates |
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6G15 ground lift switch
Started by Diverted |
13 Replies
4488 Views |
February 29, 2024, 09:31:23 am by acheld |
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EL84 LarMar
Started by tdvt |
5 Replies
2703 Views |
February 29, 2024, 05:14:30 am by Latole |
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Hoffman Princeton build in a PRRI Chassis
Started by Jrusto |
3 Replies
2265 Views |
February 28, 2024, 11:40:55 am by Jrusto |
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3 Replies
2405 Views |
February 28, 2024, 05:57:44 am by HotBluePlates |
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7 Replies
4116 Views |
February 27, 2024, 08:21:34 pm by tubenit |
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Gut shot aesthetics
Started by XYZGnomon |
2 Replies
2441 Views |
February 27, 2024, 12:58:40 am by WimWalther |
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NOS Mallory Cap Can?
Started by ALBATROS1234 |
5 Replies
2886 Views |
February 26, 2024, 09:20:16 pm by ALBATROS1234 |
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Up for grabs.....
Started by proaudioguy |
6 Replies
3147 Views |
February 26, 2024, 06:52:02 pm by scstill |
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BIAS measurement method - a question
Started by kagliostro |
4 Replies
2562 Views |
February 26, 2024, 10:10:51 am by WimWalther |
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Hybrid fixed/cathode bias measurements?
Started by Carlsoti |
3 Replies
2359 Views |
February 26, 2024, 09:01:45 am by pdf64 |
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Low Output On A "Blackvibe" Build
Started by AHeck |
45 Replies
9250 Views |
February 25, 2024, 07:41:41 pm by WimWalther |
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10 Replies
5068 Views |
February 25, 2024, 10:14:18 am by Woolybolly |
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Math question (NFB calculations)
Started by dwinstonwood |
2 Replies
2198 Views |
February 25, 2024, 10:13:19 am by dwinstonwood |
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86 Replies
26935 Views |
February 25, 2024, 09:59:16 am by Papa Jim |
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42 Replies
18093 Views |
February 25, 2024, 09:45:59 am by pdf64 |
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Fixed bias el84 jcm800
Started by AlNewman |
18 Replies
5975 Views |
February 24, 2024, 09:37:15 pm by WimWalther |
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4 Replies
2959 Views |
February 24, 2024, 08:41:58 pm by PRR |
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3 Replies
2523 Views |
February 23, 2024, 10:39:02 pm by PRR |
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Neg Bias Voltage
Started by J Rindt |
31 Replies
6869 Views |
February 23, 2024, 09:49:30 pm by sluckey |
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Thermistor question
Started by Diverted |
1 Replies
2162 Views |
February 23, 2024, 03:36:34 pm by BrownIsound |
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9 Replies
4586 Views |
February 22, 2024, 09:46:45 pm by ALBATROS1234 |
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7 Replies
3274 Views |
February 22, 2024, 06:55:44 am by EL34 |
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5 Replies
3200 Views |
February 21, 2024, 07:01:01 pm by pdf64 |
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25 Replies
6812 Views |
February 21, 2024, 05:50:34 pm by PRR |
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Any Stereo Builds to Share?
Started by tdvt |
12 Replies
4065 Views |
February 21, 2024, 03:06:33 pm by kagliostro |
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16 Replies
6772 Views |
February 21, 2024, 01:35:51 pm by WimWalther |
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1760J OT for Blues Jr.
Started by roseblood11 |
3 Replies
2422 Views |
February 21, 2024, 01:33:47 pm by roseblood11 |
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9 Replies
4287 Views |
February 21, 2024, 09:12:13 am by ALBATROS1234 |
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39 Replies
9022 Views |
February 21, 2024, 02:50:35 am by Lambertini |
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Gretsch Fury 6169 on the bench
Started by TubeGeek |
33 Replies
7841 Views |
February 20, 2024, 05:50:03 pm by TubeGeek |
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Setting up a bias type tremolo circuit
Started by WimWalther |
29 Replies
7612 Views |
February 20, 2024, 03:16:44 pm by HotBluePlates |
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Crown GPA-25 -- 1950s/1960s PA amp
Started by passaloutre |
1 Replies
2132 Views |
February 20, 2024, 11:28:36 am by passaloutre |
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10 Replies
3491 Views |
February 20, 2024, 10:26:07 am by 66Strat |
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What resistor is this? Safe to remove?
Started by Mr.Death |
17 Replies
4941 Views |
February 19, 2024, 10:33:18 pm by sluckey |
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Pots grounding
Started by Lambertini |
17 Replies
5936 Views |
February 19, 2024, 12:53:39 pm by HotBluePlates |
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Tweaking the v1 gain stage
Started by pbman1953 |
8 Replies
3454 Views |
February 19, 2024, 11:38:22 am by pbman1953 |
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Mesaboogie Mark III Simul-Class
Started by Leevi |
1 Replies
2045 Views |
February 19, 2024, 10:39:58 am by Leevi |
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Tore this apart
Started by proaudioguy |
2 Replies
2177 Views |
February 19, 2024, 03:27:09 am by WimWalther |
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2144 60/30
Started by TIMBO |
3 Replies
2493 Views |
February 17, 2024, 04:03:09 am by TIMBO |
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