Re: Tesla 525a
The Sobell 511W I fairly recently reworked had a Selenium rectifier (the first I've ever encountered).
Started out with a 1N4007, a small selection of 3 Watt metal film resistors & monitored the HT as I wound up the Variac. Final value for full mains with correct HT throughout, was 220 ohms, which has around 2 watts to contend with at high volume. After some 4 hours of merriment, the resistor remained tepid.
Mark
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Slowly turning the 'to-do', into 'ta-dah'
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