Power Pentode
These are RCA JRC-1S4=VT-210 Vacuum tubes. They were
manufactured for Both the Army and Navy in May 1945
during WWII. The printing is in
Awesome condition for tubes with this manufacturing date!
These are true collectors items. The boxes are also in
Great shape.
The RCA 1S4 vacuum tube is a miniature type used in the
output stage of lightweight, compact, portable,
battery-operated equipment. The 1S4 and 3S4 vacuum tubes
are identical except for the filament arrangement.
They require a miniature 7-contact socket and may be
mounted in any position.
Electrical Data:
Filament Voltage .................... 1.4 DC V
Filament Current ..................... 0.1 A