Sharp-Cutoff Pentode
Various Old School Manufacturers ~ RCA, CBS, Rad-Tel and
Etc.
The 1U4 Vacuum tube is a miniature type used as
a 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