[Hallicrafters] More questions on SX-100

[Mark Shaum]

----- Original Message -----
From: "Glen Zook" <gzook at yahoo.com>


> I has been my experience that the SX-100 is more
> stable than the HQ-180.  However, the HQ-145, being
> the extension of the HQ-129X, HQ-140X, and HQ-150
> series tends to be more stable than the SX-100, or at
> least as stable.  I know that my HQ-140X is slightly
> more stable than my SX-100.  However, every other
> Hammarlund receiver that I have ever used (or
> serviced) other than the HQ-129X series quoted above
> has not been very stable!  This includes the HQ-170
> series (on 20 meters and above - on 160, 80, and 40
> the stability is acceptable - on 6 meters forget it
> for SSB!).
>

Hehe - I guess our milage may vary.  My 170 #1 and 180 are quite stable
mechanically and with respect to temperature drift on the higher bands,
but agree 6 meters is just not usable with the Hammarlunds  for CW and
SSB, much drift and shift with antenna tuning, AGC etc.  My 170 #2 is
generally stable but has an irritating intermittant jump in frequency of
500 hz or so on some bands not related to the bandswitching. I need to
do some more investigating there.  I agree that the earlier Hammarlunds
are stable indeed.  My 129X is rock solid after warmup on 10 meters.

73! - Mark
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Mark Shaum K9TR
email: k9tr at dtnspeed.net
http://www.qsl.net/k9tr
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