steve's antique technologythe 546-a and 650 use a 3ap1 cathode- ray tube. model 655 uses a...

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Page 1: Steve's Antique TechnologyThe 546-A and 650 use a 3AP1 cathode- ray tube. Model 655 uses a 5CPI-A, a 5-inch cathode-ray tube. This necessitates use of 6.3-volt filament winding, in
Page 2: Steve's Antique TechnologyThe 546-A and 650 use a 3AP1 cathode- ray tube. Model 655 uses a 5CPI-A, a 5-inch cathode-ray tube. This necessitates use of 6.3-volt filament winding, in