[R-390] SSB R-390A?

Dan Rae danrae at verizon.net
Wed Mar 29 11:23:19 EST 2006


32.8 divided by 72 = 455.55 Kc/s
24.8 divided by 54 = 453.7 Kc/s
there were two series of these WW II tank radio crystals available on 
the surplus market, much in demand by hams, but I find it hard to 
believe they were used officially.
dr



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