[R-390] PTO Desicant

KC8OPP Roger S. kc8opp at yahoo.com
Fri Jul 15 20:41:51 EDT 2005


I have finally dug into the PTO on a R-390 that has
been here in the shack for about 20 years.  It has
never indicated the right freq and I am tired of
remembering the offset.  Overall the radio is in good
shape but the PTO has been off for a long time.  I
measured 6.3KHz non-linearity end to end so it is
time.

When I opened up the inner can I was surprised that
there was not a desiccant pack.  Not too bad on the
inside, a bit of dirt laying around and an ugly dark
grease smeared all over the corrector stack, but it
should clean up nice.

What does the group think, should I put a desiccant
pack inside when I put it back together?  I have a few
laying around that I have collected over the years and
could dry them out and tie them to one of the support
rods.

Thanks for any thoughts and wish me luck with the
corrector stack.  Done a few "A" PTO's with the screws
out the front, but this is the first corrector stack
adjustment.

thanks for the thoughts

73's
Roger
KC8OPP

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