The 2A3 is a triode with a mu of 4.2. Commonly used as an audio amplifier but also as a low power stage in transmitters up to 7 MHz. The second example is an RCA with a single plate construction.
Length = 5.06" Diameter = 1.88"
Max voltage = 400
Max current = 60 ma
Fil voltage = 2.5
Fil current = 2.5 amps GOTO INDEX