[NLRS] digital on 144.250

[Mary Brown]

There is a burst of CW in it about every 5-10 minutes, to fast for me to
copy... wondering if this is APRS? Winlink? I am not familiar with the
modulation either...

-----Original Message-----
From: Chris Elmquist [mailto:chrise at pobox.com] 
Sent: Monday, April 11, 2022 2:17 PM
To: Mary Brown
Cc: 'NLRS Reflector'
Subject: Re: [NLRS] digital on 144.250

On Monday (04/11/2022 at 01:34PM -0500), Mary Brown wrote:
> Someone is running some form of digital on 144.250. suspect winlink maybe?
> 90 degrees from EN24ho.

Copying it here (@ 19:16 UTC) at about S5 on a vertically polarized,
unity gain, discone antenna.   I don't recognize the modulation either
and don't currently have plumbing from this receiver to anything that could
attempt to decode.

Seems to be centered at 144.251.750 according to my IC-R8600 which is phase
locked to GPSDO reference.

There may be two stations, one is weaker at about S3 and issues periodic
"pings" and then the louder one responds with a wider bandwidth multi-tonal
modulation that's about 2 KHz wide, 1 KHz each side of the above center.

Chris NØJCF
--
Chris Elmquist


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