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Author Topic: UNID 9831 kHz RTTY?  (Read 1841 times)

Offline Nomadiq

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UNID 9831 kHz RTTY?
« on: August 11, 2021, 1518 UTC »
FSK in 31 meter broadcast band. Anyone know the origin of this 'intruder'? I can not get a decode of its signal.
QTH: Boston Northern Suburbs
Radios: Icom R75, Airspy HF+ Discovery, ICOM IC-7410, Yeasu FT-817
Antennas: Buddistick, EndFed Random Wire, Philips head screw driver jammed into the center socket

Offline tiNG

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Re: UNID 9831 kHz RTTY?
« Reply #1 on: August 12, 2021, 0821 UTC »
I have NCTAMS LANT Norfolk, VA with TX Davidsonville, MD (38.966694, -76.683083), listed on 9830,0 kHz. Probably you were a bit misstuned (or they were...).

Mode is STANAG4481 most likely with KG-84 encryption so no decoing possible.

Hope this helps.
73 & 55
Thomas
Rüm hart – klaar kiming


Offline East Troy Don

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Re: UNID 9831 kHz RTTY?
« Reply #2 on: May 03, 2022, 1501 UTC »
Strong reception 9830 khz @ 14:57.   Concluded 14:59
Primary: Yaesu FRG-7700  Secondary: ICOM R75 Tertiary: Grundig  750. Tecsun PL-990X, Tecsun PL-880 . Malahit DSP SDR V3,  Alpha Delta  SWL Sloper antenna. : Also, 1940 Mantola am/sw tube. CountyComm GP-5/SSB hand held, Tecsun PL-380 ,et al.  QTH: EAST TROY WI  USA.  Sea Level: + 320 meters .  75 miles (but not far enough) NNW of Chicago

Offline Josh

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Re: UNID 9831 kHz RTTY?
« Reply #3 on: May 04, 2022, 1926 UTC »
USN likes to fsk around these parts of the hfbc band.
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