The UV203 is the RCA version of the General Electric PR-3-A or the 50 watt "pliotron". GE also marked an identical tube C303 for sale by Cunningham. These tubes had a mu of 10.
Length = 7.87" Diameter = 2.20" (length dimension varies widely)
Max voltage = 1000
Max current = 150 ma
Fil voltage = 10
Fil current = 6.5 amps GOTO INDEX