Quote:
Originally Posted by andy
What about using a tester that only uses the cathode and G1 (like the Beltron)? It's obviously only an emission tester, but good enough to get an idea of what the CRT is like.
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I actually did that. The emission was in the milliamp range. The problem with using G1 is that you measure the emission from nearly the entire surface of the cathode. It's the tip that gets ion damage that's important. That is reflected in the G1 cutoff and that's why I wanted to measure it. It gave me much more confidence in the CRT.
In collecting some used CRTs I found a couple that have decent emission, but the G1 cutoff is extremely low.
Here'a a link to an explanation by Sencore.
http://www.sencore.com/uploads/files/RejuveCRTs.pdf The important info is on page 5.
John