The 804 is a 40 watt dissipation pentode with full power to 15 MHz. An RCA development in 1936. The second example was made by Raytheon and appears to be identical to their late RK-20. The third example is marked 804/RK-20A to add further confusion as the 20A has a 3.25 amp filament.
Length = 7.75" Diameter = 2.06"
Max voltage = 1500
Max current = 100 ma
Fil voltage = 7.5
Fil current = 3 amps GOTO INDEX