Sharp-Cutoff Pentode
The 1U4 Vacuum Tube is a miniature type used as an RF or
IF amplifier in lightweight, compact, portable,
battery-operated receivers. They require a miniature
7-contact socket and may be mounted in any position.
Electrical Data:
Filament Voltage ................... 1.4 DC V
Filament Current .................. 0.05 A
Preferred Substitutes .................. 5910
Substitutes ............................. 1T4