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ID = 57023
United States of America (USA)
Brand: Penta Laboratories; Chatsworth (CA)
Tube type:  High-vacuum Rectifier   Power-supply 
Identical to PL-250R = 250R

Base Jumbo 4-pin bayonet (1918) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 10.5 Ampere / Direct

High voltage rectifier. 60KV PIV, 250mA average, 150W plate dissipation.

Information source - - Manufacturers Literature   Catalog dated October 1963

Just Qvigstad
PL-250R: Manufacturer's Literature
Anonymous 15 Collector


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