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Frequency and Wave Shape

"If I understand correctly, your "square wave" is from a switching power supply operating at about 140KHz or so"

I'm pretty sure Vinnie has mis-stated the sweep time. All the lighting transformers I've purchased operate closer to 20 kHz out of the box. That's why the transformer must be modified. As for the waveshape, I did notice that on the later transformers. My earlier units were much more square. This issue definitely changes the method needed for ensuring that the tubes have the correct power applied.

Hate to say it, but I'm not sure I would use this method again. Pulling the square wave from a standard DC switcher and filtering it to a sine wave now seems to make more sense.



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