[Harp-L] number of crystal vs. ceramic jt30's

[john kuzloski <jkuzloski@xxxxxxxxx>]

Anybody have a rough idea of how many ceramic jt30's were made compared to the the number of crystal jt30's?  I suppose it varied by year or decade, so maybe this is a tough question to give a general answer to.  Any ideas?  Thanks!  --john k. 

		
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