21MP4 CRT needed

[ohohyodafarted]

It's a metal cone crt. No sub for it.

[dieseljeep]

Originally Posted by ohohyodafarted

It's a metal cone crt. No sub for it.

They used to have a kit for installing a 21ZP4, in place of a 21AP4 in RCA sets. It worked really great.
The 21MP4 is an electrostatic focusing tube. It can be subbed by a 21AP4, but you have to use a magnetic focusing unit.
I depends on what make of set it is. I've converted a few other makes.