The 504A is a 250 watt triode with a mu of 23. Maximum frequency for full power is 3 MHz. This is De Forest's version of the 204A . After De Forest was purchased by RCA, tubes were marked 204A/504A for a short time.
Length = 14.38" Diameter = 3.75"
Max voltage = 2500
Max current = 275 ma
Fil voltage = 11
Fil current = 3.85 amps GOTO INDEX