[K3PZN-List] Curious behavior from my mobile radio...

[Neeriemer, Bill (NIH/NLM/LHC) [C]]

I have an Alinco DR-119T mobile radio in my truck.  It is ~13-14 years
old.

Steve checked it out this year, and pronounced it in good shape.

It appears to be very sensitive on the receiver side.

I've discovered that when driving around Westminster, the squelch will
break open on a signal, which registers no power on the S-meter.

This happens regardless on the squelch setting.  However, my Yaesu VX7
doesn't detect anything.

It only happens on 145.410.  I have checked other freqs, although, it
wasn't a comprehensive analysis.

I wondered if my radio's circuitry is faulty, but if that were the case,
then I would expect the squelch breaking to be random, but this isn't
random.  That is, if my squelch breaks in a location, it always breaks
in that location.

The squelch breaking is 'stroby'. That is the areas that it breaks are
very confined.  If I drive forward a couple of feet, it stops.  It isn't
time based, because if I back up, it returns.

Also, whatever is causing it, it is continuous, if I stay in a noisy
zone, the squelch remains open until I leave.

I don't think that it is a modulated signal, because I hear nothing but
static.

I mentioned this at the BoD meeting, and heard that electric motors can
cause this.

While, I haven't checked too far from Westminster, so far, I have only
noticed this is downtown Westminster.

Have others noticed this behavior?

Comments?

73 Bill W3STG