HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: Strange Beacons on December 15, 2018, 1900 UTC

Title: Strange signal on the 40 meter band at 7035.50 kHz
Post by: Strange Beacons on December 15, 2018, 1900 UTC
I was transmitting Digital SSTV on the 40 meter band this morning when I spotted this strange signal in the waterfall. I'm not sure if I was tuned to the proper frequency or not, and I tried both USB and LSB. I suspect that this is likely someone doing a radio test of some kind. Tuned via the Web SDR located in Newport, Oregon, USA.

Video of the signal here (https://youtu.be/rxTn0P8lsrA).

I've been on the air for about three hours this morning, on 40 meters, and I only noticed the signal pop up about two hours ago. It only transmitted twice, both times for about 5-7 minutes. At first, I thought it was someone else (like me) transmitting waterfall images via digital SSTV.

I've been monitoring this frequency since I recorded the video and it has repeated a few times. In fact, it is transmitting again as I type this.

Any ideas as to what it may be? I'm using this Web SDR if you want to check it out yourself: http://kiwisdr.smeter.net:8073
Title: Re: Strange signal on the 40 meter band at 7035.50 kHz
Post by: Josh on December 16, 2018, 0100 UTC
Reminds me of stuff I've seen haarp do.
Title: Re: Strange signal on the 40 meter band at 7035.50 kHz
Post by: Strange Beacons on December 16, 2018, 0224 UTC
Quote from: Josh on December 16, 2018, 0100 UTC
Reminds me of stuff I've seen haarp do.

Yes, that the signal is HAARP-like is exactly what I thought when I first saw it in the waterfall.
Title: Re: Strange signal on the 40 meter band at 7035.50 kHz
Post by: sat_dxer on December 17, 2018, 2355 UTC
Without being on site of the remote, cannot rule out local RFI?
Title: Re: Strange signal on the 40 meter band at 7035.50 kHz
Post by: Strange Beacons on December 18, 2018, 0023 UTC
Quote from: sat_dxer on December 17, 2018, 2355 UTC
Without being on site of the remote, cannot rule out local RFI?

Local RFI is a possibility, yes.

But, I've been monitoring this signal since I first discovered it and, after last Saturday, it has not transmitted again. I'm leaning toward the signal being some sort of amateur radio operator test.