Sharp-Cutoff Pentode
The Tung-Sol 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.
This 1U4 Tube is a JTL 1U4. It was manufactured by
the Tun-Sol Corporation for the military. It comes in
its original tan box and is dated January 1952.
Made in the Good Ol' USA!
Electrical Data:
Filament Voltage ................... 1.4 DC V
Filament Current .................. 0.05 A
Preferred Substitutes .................. 5910
Substitutes ............................. 1T4