[Hammarlund] HQ-170a intermittent RX problem on certain bands

[Mike & Coreen Smith]

Hi All,

Finally have acquired a nice, but not pristine mind you, HQ-170a
....I drooled over this model of receiver back some years ago when I
was in tech school, but I digress.

It works *VERY* very well on 40m, and less well on 10m,20m,80m,160m
etc.
It does work for very brief periods on 15m and 6m, but essentially
not useable. When I first got it, it only worked on 3 bands. Using
it a few nights and fiddling seems to have brought a couple bands
alive, but very weakly.

When switching over to those 2 bands (15/6), the RX will come alive
for anywheres between not at all(usually), to 1/2 a second
(occasioanlly) to a couple minutes (rarely).

I have cleaned the bandswitch with contact cleaner and tried pushing
in a few contacts which I believed to be associated with the 15m
slot, as it was previously 100% dead on 15m. (nothing on internal
xtal cal or external signal gen)

Anyone have any idea what this intermittent problem would/could be?

Like I said, really rocks on 40m and all other bands seem quite a
ways down. 15m/6m essentially 99.999% dead.

Thanks/73

Mike VE9AA
NB,Canada
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