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Found the first major issue tonight. The 3.579 resonator in this set is in a tube envelope, and the tip is cracked off! I've never seen anything like this. Check out the pictures. The insides look a lot like a piezo element. But it must have been designed to be under vacuum. There is nothing else in there, not even a getter. It is labeled 3579545KC. I think the socket on the chassis is stamped XTAL93B34.
The shield for this 'tube' is missing. So I suspect that it has been broken for a long time. Has anyone seen something like this? If I can't find one, I'm hoping that a standard crystal can be placed under chassis. Who knows, maybe somebody has already done this.
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