[Lowfer] Navtex QRM 518 kHz-more

[David L. Wilson]

My only receiving jibberish below was operator error.  Having the NR (noise
reduction) on on the reciever provided audio that could not be copied by
Multipsk.  Something I not notice before and a little disturbing.

--
David L. Wilson
dwilson314 at verizon.net


> -----Original Message-----
> From: lowfer-bounces at mailman.qth.net [mailto:lowfer-
> bounces at mailman.qth.net] On Behalf Of David L. Wilson
> Sent: Tuesday, February 15, 2011 7:44 AM
> To: k3siw at sbcglobal.net; 'Discussion of the Lowfer (US, European, &
> UK) and MedFer bands'
> Subject: Re: [Lowfer] Navtex QRM 518 kHz-more
> 
> I did not see a spoke last night but was having terrible copy during the
> short time I listened.    The Ap index is curently 8 with the sun being
very
> active with the first X-class flare in years?.  But I may just being
having a
> multipath problem.  One station has now (Tue. 1230 UTC) been transmitting
> since I got up (a lonlong g time).  I do not know who it is (since I did
not get
> start time of good enough copy) but I just copy jibberish.  I was going to
wait
> for the station to go away but he seems to never be finished and I have to
> get to go out.  Turns out I should b....oops .  Station stopped at
> 1241 UTC and then he or someone else came up--again unable to copy.
> Frequency was silent between transmission.  Perhaps someone with a
> problem testing?
> 
> --
> David L. Wilson
> dwilson314 at verizon.net
> 
> 
> > -----Original Message-----
> > From: lowfer-bounces at mailman.qth.net [mailto:lowfer-
> > bounces at mailman.qth.net] On Behalf Of Garry Hess
> > Sent: Tuesday, February 15, 2011 12:10 AM
> > To: lowfer at mailman.qth.net >> lowfer list
> > Subject: Re: [Lowfer] Navtex QRM 518 kHz-more
> >
> > Todd and David,
> >
> > I'm not certain the problem has been fixed. I'm seeing a spike on the
> space
> > frequency right now that's strong enough to mess up decode of $04E,
> > Savannah, GA, a very strong night time signal. It's possible this is
> > just
> the
> > result of two big stations sending at the same time (heaven knows the
> > 10 minute transmit windows aren't generally adhered to), but the
> > spectrum I see looks more like one correct Navtex signal and a very
> > strong bogus line
> at
> > the space frequency. I saw similar behavior briefly earlier in the
> > evening
> too.
> >
> > A technician replacing a part after two or more days of failure on a
> > life/property service isn't acceptable, nor is the lack of a clear way
> > to
> report
> > problems. How can the service people not know when their transmitter
> > is transmitting and when it's truly off?
> >
> > 73, Garry, K3SIW, EN52ta, Elgin, IL
> >
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