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I bought this set from the service manager at Electronic Specialty Company in Charleston, WV in 1974. My dad worked there as the accountant and I worked there a couple of summers during college. The service manager told my dad that the set was originally purchased by a doctor at West Virginia University through Electronic Specialty Co. They maintained it over the years and when it blew a flyback after the CRT had been replaced the service manager got hold of it when they bought a new set. He replaced the flyback, but had not completed the rewiring. The selenium rectifiers had been replaced with diodes before I got it. I bought it for the $75 from the service manager who had lost interest in the project. I found the 30KV capacitor shorted, so the first thing I did was fix that and a couple bad filter caps. That got the set working but it did not see much use. The CRT is a 21AXP22A dated 1957. My CR-70 shows its got emissions in the good range, so I am hoping I will not see purple in the neck when I get HV to it.
It also has a few of the white peaking coils that Nick found were bad in his, so I expect to be replacing mine.
Dave
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