The 809 is a 30 watt triode with a mu of 50. It was usable up to 60 MHz. It was introduced by RCA in 1937. Length = 6.25" Diameter = 2.25" Max voltage = 1000 Max current = 100 ma Fil voltage = 6.3 Fil current = 2.5 amps GOTO INDEX
The 809 is a 30 watt triode with a mu of 50. It was usable up to 60 MHz. It was introduced by RCA in 1937.