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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: Transformer Phase Inverter - Several Questions posted by FlaCharlie on July 14, 2014 at 16:12:41:
" I've seen a few schematics that use this method and the value of the coupling cap that goes to the driven side of the transformer is huge compared to the caps used in tube inverters - 6.8uF, 8uF - compared to .47uF or less. Why is the cap so large?"It's the same as parafeed. Look up parafeed cap values.
The cap and the inductance makes a LC tank circuit and will have a resonance frequency. The idea is to push the frequency sub-sonic.
The larger the cap value, the lower the resonance frequency.
"How would you determine if the current rating is adequate for this use?"
I don't think current rating will be your problem. You need a transformer (autoformer) with really low winding capacitance and really high inductance.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 07/14/14
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Follow Ups
- RE: Transformer Phase Inverter - Several Questions - Tre' 16:41:56 07/14/14 (9)
- RE: Transformer Phase Inverter - Several Questions - Alpha Al 12:58:36 07/15/14 (6)
- RE: Transformer Phase Inverter - Several Questions - Tre' 16:05:05 07/15/14 (4)
- CT Grid Choke Phase Inverter - FlaCharlie 16:48:13 07/15/14 (3)
- RE: CT Grid Choke Phase Inverter - Tre' 17:06:20 07/15/14 (2)
- RE: CT Grid Choke Phase Inverter - TimFox 14:26:52 07/16/14 (1)
- Measurement - FlaCharlie 06:15:44 07/17/14 (0)
- Gibson - FlaCharlie 16:00:06 07/15/14 (0)
- RE: Transformer Phase Inverter - Several Questions - FlaCharlie 11:37:08 07/15/14 (1)
- RE: Transformer Phase Inverter - Several Questions - Tre' 16:02:30 07/15/14 (0)
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