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Tom,
An expansion on what Pete said about having the guns rebuilt: After the gun is removed, Bob Galanter uses an EDM (electro-dynamic machining) tool to mill out the old cathodes from the gun structure with micron precision. Bob built a custom jig to hold the gun assembly which allows the precision EDM machining to be done. Without Bob's expertise, the 15G project whold have come to a halt becausee the company which puts new cathodes and filaments back in ghe gun and mounts the gun on the new stem was no longer willing to attempt the difficult task of removing the old cathodes. I do not think they had access to EDM machining.
Tune in next week for final acceptance test results on the CRT rebuilt at Hawkeye.
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John Folsom
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