The 966 is a half-wave mercury vapor rectifier. It is United Electronic's version of the 866 with higher voltage ratings. Later tubes were designated 966A and were supposed to replace the 866A tubes. The second example is marked for the Fisher Co.
Length = 5.87" Diameter = 1.75"
Max voltage = 10000 PIV
Max current = 1 amp peak
Fil voltage = 2.5
Fil current = 5 amps GOTO INDEX