[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
More information about the R-390
mailing list