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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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I posted my GM 70 build earlier and everything working great except for some mechanical hum in one of my GM 70 filament supplies.
I'm using a Rod Coleman fed by bridge to CLC supply recommended by Rod.
First cap is 22,000uf 35v, choke is common mode with a couple dropper resistors.
One amp is not bad, the other one is much worse and very noisy in a silent room.
I remember Maximillion having some noise issues as well will some hammonds.Transformer used is a HAmmond 185G20 175 20V C.T. @8.8A
Not sure if I should try to change transformer manufacturer, use isolation mounts or try a LCLC supply.
The current large cap puts a huge strain on this transformer.Your thoughts?
Edits: 02/07/16
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Topic - Transformer hum-pinging Maximillion - deafbykhorns 16:53:18 02/07/16 (12)
- RE: Transformer hum-pinging Maximillion - Paul Joppa 13:22:52 02/08/16 (0)
- RE: Transformer hum-pinging Maximillion - hennfarm 09:36:21 02/08/16 (1)
- RE: That looks just like the hammond... - deafbykhorns 09:41:26 02/08/16 (0)
- RE: Transformer hum-pinging Maximillion - Triode_Kingdom 21:33:15 02/07/16 (2)
- RE: Transformer hum-pinging Maximillion - dave slagle 07:24:08 02/08/16 (1)
- RE: Transformer hum-pinging Maximillion - deafbykhorns 07:48:40 02/08/16 (0)
- Toroidal - Chip647 16:58:17 02/07/16 (5)
- RE: It is over rated - deafbykhorns 17:25:57 02/07/16 (4)
- RE: It is over rated - Eli Duttman 18:43:38 02/07/16 (0)
- Yes, and the cheap hammond transformers hum - Chip647 18:40:15 02/07/16 (2)
- RE: Any better transformers you recommend? - deafbykhorns 08:09:54 02/08/16 (1)
- RE: Any better transformers you recommend? - Eli Duttman 11:33:14 02/08/16 (0)
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