Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 12:18:49 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 12:18:49 pm | ||
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8 Replies
2716 Views |
March 07, 2024, 10:15:44 pmby sluckey |
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I got the "bug" again.....
Started by Jonas |
8 Replies
2881 Views |
March 07, 2024, 05:20:53 pm by Jonas |
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What is preamp tube transconductance?
Started by Jonas |
6 Replies
2581 Views |
March 07, 2024, 05:01:52 pm by Jonas |
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5f10 shared plate resistors
Started by TurboGuitarMelton |
4 Replies
2023 Views |
March 07, 2024, 10:19:02 am by 66Strat |
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Voltage doubling rectifier
Started by dwinstonwood |
9 Replies
3092 Views |
March 07, 2024, 01:47:14 am by HotBluePlates |
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Blown tube?
Started by dbishopbliss |
4 Replies
2171 Views |
March 06, 2024, 01:17:52 pm by tubeswell |
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Hoffman Princeton build in a PRRI Chassis
Started by Jrusto |
14 Replies
3655 Views |
March 06, 2024, 10:14:11 am by sluckey |
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Princtone Reverb No Tremolo with EL84's
Started by Smradek |
3 Replies
2002 Views |
March 06, 2024, 09:48:49 am by tdvt |
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Vox AC4 switch question
Started by Kesi from Hungary |
6 Replies
2262 Views |
March 05, 2024, 11:18:08 pm by Kesi from Hungary |
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High pitched noise 15 watt tube amp Monoprice
Started by sausetron@yahoo.com |
2 Replies
2157 Views |
March 05, 2024, 08:52:57 pm by sausetron@yahoo.com |
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Fender accessory jack
Started by Diverted |
14 Replies
3787 Views |
March 05, 2024, 06:38:07 pm by sluckey |
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6 Replies
4149 Views |
March 05, 2024, 06:14:23 pm by tinkering |
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5 Replies
2869 Views |
March 05, 2024, 01:13:40 pm by PRR |
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6 Replies
2239 Views |
March 05, 2024, 01:08:32 pm by PRR |
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6DN3 vs 6CJ3 - interchangeable?
Started by kasperbergholt |
1 Replies
1995 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
2854 Views |
March 04, 2024, 08:05:31 pm by glass54 |
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100 Replies
13268 Views |
March 03, 2024, 06:43:25 pm by wsscott |
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8 Replies
2672 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
2711 Views |
March 03, 2024, 11:14:29 am by silat |
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10 Replies
3259 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
2796 Views |
March 02, 2024, 06:42:13 pm by HotBluePlates |
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0 Replies
1649 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
3381 Views |
February 29, 2024, 08:58:32 pm by WimWalther |
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Cathode follower question
Started by J Rindt |
6 Replies
2308 Views |
February 29, 2024, 04:17:13 pm by HotBluePlates |
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6G15 ground lift switch
Started by Diverted |
13 Replies
4013 Views |
February 29, 2024, 09:31:23 am by acheld |
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EL84 LarMar
Started by tdvt |
5 Replies
2400 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
2011 Views |
February 28, 2024, 11:40:55 am by Jrusto |
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3 Replies
2158 Views |
February 28, 2024, 05:57:44 am by HotBluePlates |
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7 Replies
3662 Views |
February 27, 2024, 08:21:34 pm by tubenit |
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Gut shot aesthetics
Started by XYZGnomon |
2 Replies
2226 Views |
February 27, 2024, 12:58:40 am by WimWalther |
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NOS Mallory Cap Can?
Started by ALBATROS1234 |
5 Replies
2618 Views |
February 26, 2024, 09:20:16 pm by ALBATROS1234 |
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Up for grabs.....
Started by proaudioguy |
6 Replies
2861 Views |
February 26, 2024, 06:52:02 pm by scstill |
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BIAS measurement method - a question
Started by kagliostro |
4 Replies
2313 Views |
February 26, 2024, 10:10:51 am by WimWalther |
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Hybrid fixed/cathode bias measurements?
Started by Carlsoti |
3 Replies
2128 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
8380 Views |
February 25, 2024, 07:41:41 pm by WimWalther |
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10 Replies
4673 Views |
February 25, 2024, 10:14:18 am by Woolybolly |
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Math question (NFB calculations)
Started by dwinstonwood |
2 Replies
1999 Views |
February 25, 2024, 10:13:19 am by dwinstonwood |
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86 Replies
25584 Views |
February 25, 2024, 09:59:16 am by Papa Jim |
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42 Replies
17099 Views |
February 25, 2024, 09:45:59 am by pdf64 |
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Fixed bias el84 jcm800
Started by AlNewman |
18 Replies
5369 Views |
February 24, 2024, 09:37:15 pm by WimWalther |
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4 Replies
2591 Views |
February 24, 2024, 08:41:58 pm by PRR |
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3 Replies
2229 Views |
February 23, 2024, 10:39:02 pm by PRR |
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Neg Bias Voltage
Started by J Rindt |
31 Replies
6025 Views |
February 23, 2024, 09:49:30 pm by sluckey |
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Thermistor question
Started by Diverted |
1 Replies
1916 Views |
February 23, 2024, 03:36:34 pm by BrownIsound |
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9 Replies
4173 Views |
February 22, 2024, 09:46:45 pm by ALBATROS1234 |
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7 Replies
2936 Views |
February 22, 2024, 06:55:44 am by EL34 |
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5 Replies
2873 Views |
February 21, 2024, 07:01:01 pm by pdf64 |
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25 Replies
6140 Views |
February 21, 2024, 05:50:34 pm by PRR |
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Any Stereo Builds to Share?
Started by tdvt |
12 Replies
3611 Views |
February 21, 2024, 03:06:33 pm by kagliostro |
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16 Replies
6046 Views |
February 21, 2024, 01:35:51 pm by WimWalther |
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