[GK] spends most of the time so far talking about the high voltage power supply design. For the particular tubes he had on hand he needed +200V, -400V, -550V, and 6.3VAC for the CRT heater.

It’s not entirely clear why [Advanced Tinkering] needs a 50,000-volt power supply, but given the amount ... To ensure everything stays safe in the high-voltage stage, he took the precaution ...

Industry certifications, such as UL, IEC, and ISO, serve as benchmarks for safety and reliability. Compliance with these ...