[R-390] 5 khz difference?

[Masters Andy]

Good evening.  I have an EAC-67 series R-390A that I
am working through and learning about R-390A's in the
process. 

Using a recently cal'd counter, I was able to set my
BFO for top dead center on 455khz and it tracks +/- 3
khz nicely as indicated by the ticks on the panel. I
also adjusted the crystal calibrator by counting it on
frequency at 200 khz.  It stays put rather nicely as
well.

Having done this, I then went through all the bands to
have a look at dial calibration and have discovered
that .5-8.0 mhz, the dial reads 5 khz low on each band
but on the higher bands it is relatively dead on. (or
it might be said it can be set dead on using the Zero
Adjust for the lower freqs and is actually 5khz high
on the higher ones).  In any event, what gives here
and why the disparity? I first thought it might be my
17 Mhz oscillator.  When I count the 17 mhz oscillator
it indicates it is 4.790 khz low on all bands .5
through 8 mhz.  After 8 mhz, it changes, but I can't
get an accurate read on its error.  I don't see a way
to "warp" the 17 mhz crystal on but I am not convinced
that is the problem or that there is only one problem.
 Any suggestions?

Thanks, 

Dutch Masters NU5O

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