Philco 7053 CRT Checkers

[WISCOJIM]

You're going through a lot of work to test the 7JP4. The 7JP4 CRTs are well known for testing good on a tester, but not having enough brightness in actual use. This is the reason why testing a 7JP4 in a working set is the oft recommended method.

More info here:

http://www.videokarma.org/showthread.php?t=265455

Originally Posted by bandersen

I've tested 20 or so 7JP4s and all had very good emissions on the CR70, but definitely vary in brightness when actually used.

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