That leaves the problem of powering the heaters for the tubes, which is usually the job of a second 6- or 12-volt winding on a power transformer. Luckily, the surplus market has a lot of little 6. ...
A transformer consists of ... circuits to get rid off harmonics & DC signals In my experience, power plant generators often operate at 2400 volt while wind and solar farms often are in the 600 ...
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