Power Pentode
The 2A5 Vacuum tube is a glass type used in the output
stage of AC operated radio receivers. It requires a
six-contact socket and should be mounted in a vertical
position. The 2A5 vacuum tube was first developed by RCA
in 1934
Electrical Data:
Heater Voltage ................................ 2.5 V
Heater Current ............................... 1.75 A