[John Folsom]

This probably is a 1962 vintage machine, with a 5AZP4 projection CRT. This CRT was an upgraded version of the venerable 5TP4, using an improved phosphor and up to 40KV anode voltage.

The attached photos are of my late 1940s RCA projector, model TLS86A, which uses a 5TP4 projection CRT operating at 29KV. The focus is a little soft on the operating photo, but it actually produces a crisp image. If I had a bigger screen, it could handle a 6'X8' picture in a dark room.