|[AMRadio] National Calibrator|
bcarling at cfl.rr.com
Sat Aug 15 18:13:44 EDT 2009
Jim - what type of crystal holder do they use?
I have replacement crystals for sale, that you could press into
service there - on both 1000 KC. and also on 100 KC.
Best regards - Brian, AF4K
From: "Jim" <ars-w5jo at brightok.net>
> Has anyone ever worked on a National XCU 50 crystal calibrator?
> Specifically I am curious about the Valpey crystal in it. The one
> meg side is not working and I believe the quartz slab may be cleaned
> to restore operation. The caveat is I am a bit hesitant to open the
> case without knowing what to expect.
> Has anyone here ever taken one apart that can tell me how they are
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