New 1950s DuMont CRT test 21FP4 @retrochad
New 1950s DuMont CRT test 21FP4  @retrochad
Uploaded August 2011 | Updated September 2026, 6 days ago
I was able to find another DuMont set almost exactly like the other one I got and its CRT tests good. I am now going to re-test the original CRT as I think I may have had the tester set up wrong. In any case I now have at least one good CRT I can use.
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New 1950's DuMont CRT test 21FP4

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