Welcome To the Hoffman Amplifiers Forum
October 22, 2025, 08:45:03 pm
Welcome To the Hoffman Amplifiers ForumOctober 22, 2025, 08:45:03 pm | ||
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| 0 Members and 65 Guests are viewing this board. | ||||
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Blowing Fuses Unless I Use A Variac ??
Started by Lectroid |
1 Replies
1867 Views |
January 29, 2021, 02:27:55 pmby tubeswell |
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Loud amp! I need more control.
Started by raza |
5 Replies
2418 Views |
January 29, 2021, 09:09:46 am by SnickSound |
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Bandmaster 6G7A grid stoppers
Started by Diverted |
1 Replies
1955 Views |
January 28, 2021, 05:19:11 pm by sluckey |
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Power Transformer for Sano B18W
Started by eurekaiv |
12 Replies
3138 Views |
January 28, 2021, 03:41:19 pm by shooter |
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Any reason this wouldn't work?
Started by 12AX7 |
24 Replies
7261 Views |
January 28, 2021, 07:10:38 am by Pwurso |
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Ampeg Portaflex B12-XY ?s
Started by waldner |
2 Replies
1943 Views |
January 27, 2021, 10:45:04 pm by waldner |
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Wards GIM 9171A...circuit analysis?
Started by BrianS |
14 Replies
4537 Views |
January 27, 2021, 07:19:35 pm by sluckey |
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Proper 6V6 Bias for 5E3
Started by scstill |
10 Replies
4912 Views |
January 27, 2021, 05:21:39 pm by sluckey |
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Ever Tried A Reverse Bright Cap?
Started by jordan86 |
7 Replies
3492 Views |
January 27, 2021, 11:20:06 am by 2deaf |
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transformer question S-6424
Started by Bieworm |
3 Replies
2298 Views |
January 26, 2021, 01:41:05 pm by SnickSound |
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10 Replies
3925 Views |
January 26, 2021, 12:04:49 pm by tubeswell |
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Cause of high plate voltage on 12ax7
Started by jordan86 |
23 Replies
6316 Views |
January 26, 2021, 09:50:05 am by jordan86 |
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0 Replies
1878 Views |
January 26, 2021, 03:33:38 am by Bieworm |
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Kustom tube amp not working
Started by gdamato |
13 Replies
4246 Views |
January 25, 2021, 09:41:47 pm by gdamato |
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2 Replies
2068 Views |
January 25, 2021, 09:31:11 pm by PRR |
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Dull/snubber caps in preamp
Started by ampnewbie |
3 Replies
3177 Views |
January 25, 2021, 08:43:42 pm by jojokeo |
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Cap replacement question
Started by pbman1953 |
11 Replies
2874 Views |
January 25, 2021, 07:23:45 pm by pbman1953 |
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More AO44 fun
Started by jojokeo |
4 Replies
2429 Views |
January 25, 2021, 07:13:34 pm by jojokeo |
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Trem-O-Nator Poll and projects
Started by sluckey |
29 Replies
8841 Views |
January 25, 2021, 03:53:14 pm by sluckey |
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1969/70 Vibrochamp high note modulation
Started by Voxbox |
7 Replies
2866 Views |
January 25, 2021, 03:28:41 pm by 66Strat |
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1M Gain pot / voltage divider question
Started by Bieworm |
1 Replies
1734 Views |
January 25, 2021, 11:10:23 am by jordan86 |
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Channel switching 2204?
Started by JustMike |
1 Replies
1824 Views |
January 25, 2021, 06:18:41 am by SnickSound |
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1 Replies
1969 Views |
January 24, 2021, 09:39:03 pm by PRR |
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8 Replies
3260 Views |
January 24, 2021, 06:37:20 pm by Mike_J |
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6 Replies
2734 Views |
January 24, 2021, 11:23:44 am by isaac_teller |
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Dropping B+ secondary of 5e3
Started by fpolak |
25 Replies
6690 Views |
January 24, 2021, 09:31:38 am by fpolak |
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26 Replies
6586 Views |
January 24, 2021, 12:54:21 am by munkeyboy |
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Power transformer bolt is stripped.
Started by Mike_J |
22 Replies
6416 Views |
January 23, 2021, 08:49:41 pm by Mike_J |
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16 Replies
4741 Views |
January 23, 2021, 08:33:30 pm by acheld |
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RR Blackvibe schematic error?
Started by mikhett |
4 Replies
2251 Views |
January 22, 2021, 09:54:53 pm by PRR |
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more gain ideas
Started by Bieworm |
5 Replies
2910 Views |
January 22, 2021, 02:48:53 pm by Bieworm |
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JTM45 Phase Inverter Mods
Started by sgbrewing |
25 Replies
7521 Views |
January 22, 2021, 01:43:49 pm by 2deaf |
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POP between two presence circuits.
Started by raza |
12 Replies
3380 Views |
January 22, 2021, 01:25:53 pm by PRR |
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Testing a power transformer under load?
Started by eurekaiv |
9 Replies
3707 Views |
January 22, 2021, 08:04:53 am by Pietro |
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Valco Supreme
Started by isaac_teller |
3 Replies
2400 Views |
January 21, 2021, 09:23:08 am by isaac_teller |
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14 Replies
4724 Views |
January 20, 2021, 11:23:48 pm by glass54 |
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Voice of music model 136
Started by goldstache |
7 Replies
3177 Views |
January 20, 2021, 07:26:13 pm by goldstache |
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Epiphone Electar
Started by LazarusLong |
25 Replies
6369 Views |
January 20, 2021, 01:47:27 pm by bmccowan |
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5 Replies
2726 Views |
January 20, 2021, 02:01:06 am by MrsColumbo |
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Fixed bias 5D3
Started by Leevi |
5 Replies
2488 Views |
January 20, 2021, 12:58:58 am by Leevi |
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24 Replies
7376 Views |
January 19, 2021, 12:09:25 pm by sluckey |
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even MORE AO44 fun
Started by thetragichero |
1 Replies
1716 Views |
January 19, 2021, 11:21:05 am by SILVERGUN |
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Power transformer primary taps.
Started by chocopower |
3 Replies
2051 Views |
January 19, 2021, 08:49:18 am by sluckey |
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Extend bias range
Started by Bugman3183 |
3 Replies
1977 Views |
January 18, 2021, 03:43:41 pm by glass54 |
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Is dog house too tight?
Started by Mike_J |
22 Replies
5551 Views |
January 18, 2021, 02:30:14 pm by Mike_J |
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55 Replies
9671 Views |
January 18, 2021, 01:30:43 pm by pbman1953 |
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Harvard 5F10 bias pot
Started by Diverted |
7 Replies
3403 Views |
January 18, 2021, 12:44:41 pm by Diverted |
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5 Replies
2516 Views |
January 18, 2021, 10:26:28 am by Mike_J |
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125A6AX OT
Started by Leevi |
1 Replies
1757 Views |
January 18, 2021, 03:33:29 am by thetragichero |
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2 Replies
2348 Views |
January 17, 2021, 10:17:09 pm by scstill |
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