Fw: An odd receiver problem

[Dick Blaney]

Could that be the NIST, (ex National Bureau of Standards), test signal
looking for the MUF?  I hear that on many bands.
73 de
Dick,  WB8MHE
wb8mhe at bright.net

-----Original Message-----
From: Floyd Sense <sentek at sprintmail.com>
To: BOATANCHORS at LISTSERV.TEMPE.GOV BOATANCHORS at LISTSERV.TEMPE.GOV>
Date: Sunday, May 16, 1999 10:58 AM
Subject: An odd receiver problem


>Here's an unusual problem I've not seen before and at the moment I
can't
>carry the receiver out to the shop to try and locate the cause- so am
>fishing for ideas:
>
>The receiver is a National NC-300, completely recapped (not the
micas),
>properly aligned, all functions working properly.  It's extremely
stable, I
>can tune it to the boatanchor swap net on 40 SSB on Saturday mornings
and
>not have to retune it at all for the duration of the net.  Now for
the
>problem.  At seemingly random times while listening to a sideband
signal in
>the 3Kc selectivity position, a very "watery" sounding carrier
appears near
>the upper edge of the passband and it very slowly moves down across
the
>passband.  The signal is very weak.  If you've ever chased CW DX from
Asia,
>the signal has that same "watery" sound that those signals have,
having
>passed over the pole.  The signal is just wobbly enough in frequency
that
>the "Tone" filter in my Timewave DSP-599X filter won't lock onto it.
When I
>first noticed it, it sounded like a DX station very slowly tuning his
VFO
>across the band.  If I tune to a dead spot in the band, the tone
never
>appears.  Have never heard it while listening to CW.  Listening to a
net on
>40 SSB, it appears every few minutes, but with no pattern.  Moving
the
>bandwidth control to 8Kc has no affect on the tone.  This phantom
signal can
>be heard with the receiver tuned anywhere in the 40 mtr SSB segment-
don't
>know yet about other bands.  Any ideas ?
>
>
>
>K8AC
>Floyd Sense in Angier, NC
>
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