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Questions about tubes and gear that glows. FAQ

RE: "Those discs are just cosmetic"

I have no idea if the circuit in question is truly tubed. However, it's easy enough to get the 250 VDC or so needed for B+. Voltage multiply that 18 VAC.

The attached 1/2 wave parallel setup would certainly take care of the few mA. 4X 12AX7 sections draw. Even the less efficient Cockcroft-Walton configuration might be good enough.






Eli D.


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