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Author Topic: What am I hearing?  (Read 392 times)
N4NOO
Member

Posts: 106




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« on: July 18, 2003, 02:19:36 AM »

Friday morning at 06:10Z on 6.315 MHz I am hearing what I at first thought was a shortwave music station with a bass guitar and drum.  Very rhythmic.  I guess it's some form of digital signal.  Any guesses?
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KH6DV
Member

Posts: 21




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« Reply #1 on: July 18, 2003, 05:25:30 AM »

6315Khz ... If your listening in USB then you are
probably hearing NOJ, Coast Guard Comsta Kodiak
sending its "clear channel" marker, thats what I hear
when I tune that frequency. 6315 is within the data
assignments for the maritime Coast Station service.
Depending on your propagation you may be instead
hearing UDB. When I owned a Coast station my 6Mhz
assignment was 6325.0 ... 10Khz up the band. The two
tones of the marker have a 170Hz spacing (shift) and
have an ID inbeded in it, if you could decode it you
would see the stations selcall and MMID number. Most
of the stations you here sending this marker also ID
in cw with a tome on their "mark" frequency.

Ron KH6DV
Kaneohe Hawaii
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KA4WJA
Member

Posts: 690




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« Reply #2 on: July 20, 2003, 02:27:10 AM »

Rick,
If you are listening on 6315khz USB....
You are listening to the U.S. Coast Guard (USCG)....

BUT, you are most probably copying NMN from Cheasapeak, VA.........not NOJ, from Alaska....
(listen for their CW ID, it is sent at a fairly slow CW...10wpm, I think)

HF Maritime channels (both voice and data) are "shared" worldwide, and while Ron, KH6DV probably copies NOJ, from Alaska very well there in Hawaii...here in the Southeast US mainland, I do not copy NOJ on 6315......


If you listen on 6316khz, you'll hear WLO Radio.....from Mobile, AL......which is a private coast station.......

Good luck and good swl'ing....
73,
John,   KA4WJA


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