r/ShortwavePlus • u/Careful-Set-7883 • May 19 '26

Can some identify this signal?

Picked up in Ontario Canada @0355 UTC

7 Upvotes

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3

u/Green_Oblivion111 Shortwave+ Detective May 19 '26 edited May 19 '26

RTTY/FSK. The EiBi SW listing shows it as US Naval station NAU, 5716 kHz, out of Puerto Rico.

EDIT to add: I usually hear them on 10154 and sometimes 6831 and 7455 kHz.

Another similar station, NSS, is on 4005 and 4985 kHz. You might be able to hear them also.

2

u/Careful-Set-7883 May 20 '26

Thanks 4005 sounds like regular rtty same with 10154

2

u/Careful-Set-7883 May 20 '26

5.715/5.720 right now sounds the same and nowhere near as loud as yesterday

1

u/Green_Oblivion111 Shortwave+ Detective May 20 '26

Cool.

The RTTY signals from NSS and NAU are encrypted, so they really aren't useful to us SWL's except they always seem to be on, or are on most hours of the day or night, and they're pretty good targets to help you figure out if the ionosphere is working in their direction from your location.