Quote:
Originally Posted by EdKozk2
If you have an older oscilloscope , like a Sylvania 400 you could swap crts. Another idea would be to wire up a jumper harness with with the necessary plug and socket connections to a newer oscilloscope, like a Heathkit that uses a 5UP1. You would just have to be sure the 7EP4 anode voltage is not exceeded.
The picture I included is one I made up for repairing Philco split chassis sets.
Ed
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That's a nice idea actually. I may buy a cheap 5BP1 based scope just for testing 7EP4s and 5BP4s. My current scope is a modern PC based digital scope. I also have a late model Tektronix for backup. Nothing old enough to sub the 7EP4 into. In any case, a collector in the Detroit area has graciously offered to help me test the CRT in a working chassis when it arrives from Pennsylvania.