Re: PW Jan 1983 50 Ohm Dummy load
Automotive oils have a whole cocktail of additives in them which change their electrical properties and also might react with metal surfaces. They start off by being quite basic, and when used in car engines, head towards becoming acidic, but I doubt that is encountered in 100W dummy loads. Aircraft oils are made of different stuff and need fewer additives. I think the animal feed liquid paraffin is pure(ish).
B
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