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In Reply to: RE: final report on switching trans vs halo trans for filament supply posted by vinnie2 on January 03, 2017 at 06:34:16
They have more primary windings and will run off 120volt, you can remove enough secondary windings to get around 3 volts or less.
I may try to add some primary windings which should lower the voltage some more. The stock are about 12.5:1
You could always buy the ferrite core from digikey and wind your own
Follow Ups:
That turns ratio makes sense. The 120V units are about 5.5:1. The cores are available from multiple sellers on eBay, and they're extremely cheap (see link below).
Question: How do you reconcile the increase in primary current when you use the 240V unit on 120V? Have you compared the primary wire gauge used on the two versions?
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Buy Chinese. Bury freedom.
Thanks deaf, I will keep that in mind if I can't get the 120 volt units low enough.
Edits: 01/03/17
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