Sharp-Cutoff Tetrode
The 24A / 24 Vacuum tube is a glass type used as an RF
amplifier or biased detector
in AC-operated receivers. It was first developed in 1930
by RCA and requires a five-contact socket.
Electrical Data:
Filament Voltage .............................. 2.5 V
Filament Current .............................. 1.75 A
Preferred Substitutes ................... 24, 224,
UX-224A, 324, CX-324A, 35, 51