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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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In Reply to: RE: final report on switching trans vs halo trans for filament supply posted by megasat16 on January 3, 2017 at 13:23:41:
Here's the schematic. This was drawn from the original 60W units that were common until about a year ago. The new units are slightly different. A diode is connected from the top of the Diac to the junction of the two transistors, and capacitors C3 and C4 are 0.47u.
It's necessary to add a filter capacitor (shown with dotted lines in the schematic). A value of 47u will yield a waveform like the one below. This level of 120Hz ripple will be inaudible if a hum pot is used.
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Follow Ups
- Halo Transformer Schematic - Triode_Kingdom 17:53:35 01/03/17 (3)
- Interesting! - megasat16 12:19:33 01/04/17 (2)
- RE: Interesting! - Triode_Kingdom 13:33:47 01/04/17 (1)
- RE: Interesting! - megasat16 16:16:51 01/05/17 (0)
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