Medium-Mu Twin Triode
The 3A5 is a miniature seven pin based vacuum tube.
Operation with a filament voltage of 1.4 and current of
0.22 is possble by parallel operations of the
centre-tapped filament. It is designed primarily for
portable transmitters at frequencies up to 50MHz.
It was first developed in 1940.
Electrical Data:
Heater Voltage ............................ 2.8 Vplts
Heater Current ............................ 0.11 Amps
Prefered Substitutes: ............ DCC90