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ID = 33285
United States of America (USA)
Brand: Penta Laboratories; Chatsworth (CA)
Tube type:  Relay in glass (not Relay Triode) 
Identical to PL-R1
Similar Tubes
Normally replaceable-slightly different:
  5TA-75 ; IVF6 ; VS2_EIMAC

Description SPDT HV vacuum switch. Operates with external coil.
Contact ratings: 5KV, up to 1.5A DC; 20KVpk RF handling potential. 
Information source - - Manufacturers Literature   
PL-R1: Private collection
Emilio Ciardiello

PL-R1: Manufacturer's Literature
Anonymous 15 Collector

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