Early Television
Early Television
Early Television
Early Television
Early Television Early Television

Postwar American Television

12AP4

Early Television

The 12AP4 was the tube used in all prewar 12 inch American sets. It was made by RCA and sold to other manufacturers. It uses magnetic deflection and electrostatic focus.

12AP4 manufacturing process
12AP4 substitute

12AP4 specification sheet

Radar tube using 12AP4 shell