Just finished this RCA 8PCS41 project.

[Eric H]

Originally Posted by Electronic M

Sorry to go off topic, but I have that same CRT tester and have been wondering if it needs an adapter to test mono CRTs with the 10BP4 base or not.

Tom C.

I can answer that one, no, it doesn't need an adapter for the early B&W tubes, the cable plugs directly onto the tube.

[Pielock373]

Here's another fun video comparing the 25 inch picture of the 1948 8PCS41 against the 9-1/2 inch picture of the 1947 730TV1. Both are RCA's.

Video: