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Messages - KM0NAS

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16
I didn't have much exposure to SW when I was a kid. My dad was on AM radio though so I would listen to him. I also had the Radio Shack Sky Talker walkie talkies which I thought was pretty cool. I also remember driving around with my dad as he tried to DX our local AM radio station (the same one he was on) from thousands of mile away after dark while we were on vacation. It was a clear channel station and he was trying to pick up the local football game from back home. We were able to make it work.

I didn't really get into the hobby until I stumbled upon online SDRs. From there I wanted to know what I could hear from my QTH. My first radio was a Realistic DX-305 and then a Kenwood R-1000.

Neither get any use today as I got my ticket and now just listen on my TS-570D transceiver.

17
Congratulations, that's a good distance.

18
Long Dasher now active on 6484, 8999, 11980, 12499, 16199
15:59:46 UTC
Saturday, April 4, 2020

19
It is just a two second carrier and then 27 seconds of silence. The TDoA sample is 30 seconds long. So basically you will only have two seconds of data to work with each time you try. I don't think you you'd get any meaningful results.

20
11950 is the frequency I find the most puzzling. Why right in the middle of the 25m broadcast band like that? It would seem that dropping down to 11550 or so would be a far better area and avoid QRM to an experiment if that is what it is.

21
I heard today on these frequencies. Was a strong signal from my QTH in MN. Ended around 20:24 UTC. Was in progress when I tuned in around 19:59 UTC.

5775
6375
6700
7050
7725
7950
8275
8575
8700
9375
9600 -not heard but possible interference
10250

22
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: January 03, 2020, 1638 UTC »
After being off the air for a few days, the signal sprang back up today still on 7475.

I did notice that if you look up three posts I have a TDoA map with the tightest bullseye I have yet created for this source. It was on December 28th. What I hadn't realized before is that the bullseye is very close to on top of NLK, the Jim Creek Naval Radio Station.

The VLF antenna there is likely not the source of this but perhaps they are experimenting with something new.

~KM0NAS

23
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: December 28, 2019, 2018 UTC »
With some locations coming back as Victoria Island as well I wonder if it isn't something at Esquimalt Marine Forces Headquarters.

48.429556, -123.429149

https://www.google.com/maps/place/48°25'46.4%22N+123°25'44.9%22W/@48.429556,-123.431343,945m/data=!3m2!1e3!4b1!4m5!3m4!1s0x0:0x0!8m2!3d48.429556!4d-123.429149

There are a number of antenna towers there.

~KM0NAS

24
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: December 28, 2019, 0005 UTC »
I tried again this late afternoon after the commercial station went off the air. I"m guessing my original images pointing to Alaska were thrown off by interference from the commercial station in Thailand. The SDR in Hawaii was unfortunately no longer getting a good signal and I could only find three really good signals to use. Unfortunately they were kind of lined up East-west. I would have liked to add in something further north or south.

When I first ran a number of TDoA samples and they all returned similar though not identical results. They were all a variation on something like this:



It shows the signal coming from either north or south of the middle of the western half of the US. Intriguingly these two lobes do head north and south toward the circle drawn by Token which I was thinking could narrow the location down to either somewhere near Baja or Edmonton (in general.)

I listened in to the VE6SLP SDR in Edmonton and sure enough the tics were coming in nicely. I added that to the TDoA and got a much more specific area.

I ran many scans and they tended to come back with either a vague area between Helena and Butte Montana but there were also some that came back pointing to Seattle including this very specific bullseye. The Seattle maps were FAR more specific and a much tighter bullseye which I would think indicated better data. (but I have not done a lot of TDoA). Montana seems to point more Military to me while Seattle in my mind point more to tech company. I was unable to use either of the online SDRs in the Seattle area for my analysis.




It also seems that depending on which stations you use you can end up with very different results for the TDoA. Quite interesting.

I tried to do more but at 11:45 UTC a commercial station came on the frequency and I started to get interference and figured the data would no longer be good so I quite for the night.

~KM0NAS

25
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: December 27, 2019, 1845 UTC »
Thanks for looking into this Token. I tried again this morning to do some TDoA and I found some stations with great signal. NOEMP, AI6VN and CM88cm seem to get it in strong but unfortunately they also pick up Radio Thailand which will screw up any TDoA attempts. Looks like the Udon Thani transmitter site used from 14:00 UTC to 20:15 UTC (at least according to online schedules)

For me in CST land that is 8:00 AM to 3:15 PM. I guess I will try in the afternoon with the Kiwi method. It would be interesting to get a few more circles like yours and see where they overlap.

~KM0NAS



26
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: December 26, 2019, 1827 UTC »
I tried to do a TDoA for the signal and it took a lot of checking to find any kiwiSDRs that could pick it up! I tried 15 different ones around the country with no success until I tried Point Reyes CA. Nice strong signal there. From there I found other SDRs on the west coast that could pick it up.

I ended up using NA7U in Idaho, NAK in Washington State and AI6VN/KH6 in Hawaii. KPH came back with bad data so I left that out.

The results?



I tried again hoping to get good data from all stations. This time KPH worked but I got bad data from the Hawaii station and it was excluded. MUCH more interesting results though putting a nice hotspot right on the Fox Islands in the Aleutians.



The Fox Islands are uninhabited but the two islands within the forth most ring at the top are St. Paul and St. George islands, the Pribilof Islands. Both are inhabited. I am not aware of any current broadcast sites there. St. Paul used to be a LORAN site back in the day. Maybe someone is testing something new?

I wanted some signals from the West to add into the TDoA but I could not find the signal on anything in Japan.

Anyone else want to give it a go?

~KM0NAS

27
HF Mystery Signals / Re: UNID "Time Signal" at 7475 in AM mode
« on: December 26, 2019, 1643 UTC »
It is interesting that it has a carrier which makes it distinct from the other 1 pps pip being discussed.

I made a recording on Christmas as it was present on the same freq. Today, the 26th it is still going strong.

This is the recording from the 25th.
https://www.youtube.com/watch?v=7muB-7GpjSk

~KM0NAS

28
HF Mystery Signals / Re: All 1 PPS pip / pulse / tick logs here please
« on: December 25, 2019, 2327 UTC »
Yes, on 7450 kHz today, Christmas day. December 25th. Hearing right now since I tuned in around 11:00 UTC.

29
22 Meter Band HiFER Beacons / Re: New Beacon: MN 13562.8
« on: May 09, 2019, 0254 UTC »
Well thanks for trying. Propagation on these little signals truly is strange.

~KM0NAS

30
22 Meter Band HiFER Beacons / New Beacon: MN 13562.8
« on: April 23, 2019, 1700 UTC »
Hello Everyone, the snow has finally melted and I was able to get my antenna up today so the beacon is on the air. Here are the details.

Frequency: 13562.8
Call: MN (13 WPM CW)
Grid Locator: EN34fw
Location: Shorewood, MN
Antenna: Dipole at 40 feet. Radiating mostly North and South
Schedule: Should be on 24/7 unless I decide to use the antenna for a listening session.

Details: Beacon is a Black Cat Systems kit.

Reports welcome!

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