Power Pentode
The 41 Vacuum tube is a glass type used as a
resistance-coupled or impedance-coupled amplifier in
battery-operated receivers. This type is identical
electrically with type 6K6GT. It was first developed by
the Radio Corporation of America {RCA} in 1937.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.4 A
Substitutes ......................... 42