Re: Philips 170A restoration
Chris, a regulator maintains the value of something. In electronics that normally means maintaining a particular voltage, but an oven thermostat on a gas cooker is also a regulator, and the term is used more loosely in other fields such as steam engines. A variac doesn't regulate anything - it is a variable ratio transformer which can be used to step up or step down an AC voltage. You are confusing 'regulator' with 'selector' or 'adjuster'.
Enough of this nit picking though - back on topic please.
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