Quote:
Originally Posted by benman94
Another fun fact about the loctal types, though rather useless for TV, is that they have a ruggedized heater-cathode assembly to allow overvoltages of up to 7 volts. This is the approximate voltage from a fully charged 6.3 volt car battery with the alternator running as well.
I have a Williamson I built with 7A4s in the first four stages and Sylvania 807Ws for the output tubes, with a regulated 6.3 volt heater supply. I expect the loctals out front to last until Armageddon...
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Small correction , but since you didn't grow up with 6 volt cars you are automatically forgiven ;
All cars in the 6 volt era had generators , in fact the generator outlived the 6 volt system and the earliest 12 volt cars still had an actual DC generator . My 53 Buick was the last GM 6 volt car , and the last straight eight engine , in 1954 GM eliminated both the straight eight and the 6 volt system but the generator still hung around in GM cars till at least 1961 because my 61 caddy had a generator (with it's 12 volt system) . My 64 caddy was the first car I owned that had an alternator , which BTW in car use the alternator IS by far the better suited machine , generators with their full current brushes were a far more frequent replacement item than today's alternators are
