ysl t shirt ssense|Yves Saint Laurent The Collins 32V-2 Plate Transformer measures 840vac - 0 - 840vac. Used the "600V" tap on the primary which is the highest DCR. Using the "700V" tap should produce about 950vac each side of CT. Tested the Potter-Brumfield relays which are marked as 24vac coils. Running on 28vdc, the coil draws almost 2 amps.The T301 is energized by closing the LV switch, S304. Three separate windings on transformer T301 furnishes filament power to the tubes. The low voltage plate supply employs a type 5Z4 rectifier tube in a full wave circuit with a two-section choke input filter. Subscribe