Quote:
Originally Posted by Rock Hornbuckle
A coil is a transformer and it works on a Model A. I have used many transformers with DC voltages as high as 400VDC without encountering the problem that you suggest. Is there something I'm missing?
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I think he's referring to a straight AC transformer. What you're referring to was used in the early automobile radios as a 'vibrator' and interrupted the dc circuit thereby simulating a sinusoidal current for a step-up transformer.
And yes, some of these radio "step up" transformers would produce the B+ voltages for vacuum tube radios.
Gosh, I haven't thought of those radios (or the gentle hum behind the dash) since I was a kid!
Joe K