[R-390] R-390A "Dial" Problem

Mike Hardie mike46 at shaw.ca
Sun Aug 17 13:24:39 EDT 2008


Not much trouble shooting has been done yet, and this problem has been 
present since square one.

On all bands below and including 7 mcs the dial is just about dead on with 
the dial clutch adjustment about in the middle, but when the 8 mcs band is 
selected the dial reads 10 kc higher than it should. (Confirmed by 
listnening to calibrator and WWV, the zero adjust won't go quite far enough 
to make the dial read corrrectly)  This 10 kc discrepancy is present on all 
the higher bands, although it's very possible the higher bands are accurate 
and the dial should be 10 kc low on the lower bands. This appears to be a 
problem with the first crystal oscillator.  It might be possible to make an 
adjustment that would result in the lower bands reading correctly at one end 
of the clutch travel, and the higher bands OK at the other end of the 
travel, but that wouldn't really be fixing the problem.

Has anyone else experienced or better yet cured this problem?

Mike VE7MMH 



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