They are Kriss, these will be Asian or Far East and are very common during the morning F2. ISM is industrial, scientific and medical so these should be within a few hundred KHz on 27MHz but in reality they spread out much further. I've also seen a few in the 40MHz band.
https://en.wikipedia.org/wiki/ISM_radio_band

Paul

Thank you Paul!
What are the squiggle lines? I thought those were RF ovens that leak RF?
What's ISM?

Kriss KA1GJU

Kriss, those two recordings are an OTHR, this is my local one nicknamed Pluto II from Akrotiri in Cyprus. It's about 3000KM from me and the associated ionosonde makes a useful indicator of the F2 MUF. It's very common to see the OTHR sitting right at the point the ionosonde signal fades out and it moves frequency following the MUF. It tends to sit where it wants with no regard for other users or allocations. The attached jpg I made demonstrating ISM squiggles on 27MHz shows the two signals of the Cyprus ionosonde fading at the top end of 10M and two OTHR signals can be seen around that frequency.

I've just made a recording of it showing how it sounds both in AM and USB.
https://youtu.be/UOW__rcYBqQ

Paul

RX-888 MKII, Elad FDM-S3, RTLSDR820.
Icom ICR8500, SDRPlay RSP1A, A*rspy.
HS Publications D100 TV-DX receiver.
Sony XDR F1, TEF6686 tuner, XDR-GTK.
LNA4ALL, SV1AFN & CCW Multicouplers.
W4KMA 17-100MHz custom Log Periodic.
Wellbrook ALA1530AL1 active HF loop.
Korner 19ele BII, Korner 19ele BIII.

www.youtube.com/Aceblaggard

24 hour digimode log
https://bit.ly/3xxUQA2

Magloop Simon -

I've been seeing those little, millisecond pulses for several months now, on a number of different frequencies. I think they are some sort of channel marker, as I've also seen some multi-channel digital signals in the same frequency ranges, but never both at the same time. In terms of HF signals, this is a new one, and I've not seen any info on them yet. I tend to think this is coming from Russia, as the signals I see here on the west coast of North America seem to favor propagation from the Russian Far East.

Please feel to contact me at: b j w a h l 5 9 @ g m a i l . c o m  [no spaces] if you want to chat about this. I'm thinking we've been taking up a bit too much of the forum with this, so it might be best to not cheese off the other Simon... ;)

Brendan WA7HL, CN88rs

Hi Ricky

This group is specifically for users of Simon Brown's SDR Console SDR software.

Looks like you really need to post this in the SDR Play group:

https://groups.io/g/SDRPlayUsers

73

Max

Anyone running ION2G ALE SOFTWARE on the SDRPLAY RSP1A? 

The ION2G ALE program has CAT control mode that works with most Icom, Kenwood and Yeasu HF radios.  Then maybe using THE RSP1A's virtual audio channel connections, for imputing audio into the PC.  https://ion2g.app/

Best Regards Rick Kd4jrx
ric5@...

If ONLY SDRC Servers were mapped like they were back last decade on version 1.5 😪
Then one could easily choose a site geographically vs searching through the list by call
sign.

Kriss KA1GJU

Hi Brendon

Spot on..though the bursts of data changing frequency I know as the data transmission..( short bursts , maybe 100khz apart, skipping in frequency.)

——-
——-
———
——
——

Etc.

The othr changes frequency often, but is constant untill changes..following max muf or max range.

Thing is…we are buggered in the respect that all are government approved ( in each country) so there is nothing we can do..however good for tuning up in and trying out amps, tuning antennas etc..lol..

Simon g0zen

Dennis KA6FUB - those bursts you're seeing are the USN's ROTHR, with several sites in CONUS and elsewhere. The other, continuous transmission is most likely/certainly on of the "Konteynr" OTHR sites from Russia. Mind you, from up here in NW Washington, I've seen Konteynr, ROTHR, the Chinese systems, the UK's stuff from Cyprus, and JORN - the Aussie system, very common out here on the left coast. There are a lot of OTHR systems, and it seems more show up all the time.

The waterfall signature, sound, and width generally distinguishes the OTHR systems from the wideband HF Data users - the high-speed trading signals - rather well. The HS stuff stays on frequency, the OTHR's are all over the place by comparison.

Brendan WA7HL

I wonder what somebody in Greenland or Iceland might see. Greenland might be the closer location to the source if it is East of you and significantly stronger than at Simon's place.
{^_^}

BTW... The SteppIR's place both signals recorded above East of me, and the magnetic loop placed them both at approximate 060 deg.
Too bad the Kiwi Sysops have real crappy antennas on their SDR's.

Anyone know of some Kiwi SDR's sites that actually have a useful antenna on 20-17m? I gave up after 20 minutes of useless RXR's.

Kriss KA1GJU

Mike (N2MS),
Sure sounds similar, but at 060 degrees with +/-10 of uncertainty, places it in one of the Russian Republics possibly.

O60 degree plot from my QTH:


Be a BIG bummer when this this appears on 20M phone section of the band this weekend!

73 Kriss KA1GJU

Thanks Simon...
--
Dennis
KA6FUB

Hi Dennis

That i think is frequency hoping data..

It also appears on 7mhz..etc..

I cant remember the post and internet pages that went into great depth about that..but it is usa uk etc gov approved..

There is also the Russian, Australian.USA, China etc over the horizon radars, who answer to no one..

Something we have to accept unfortunately..

Simon..

I think this is the same seen here (Southern OR USA).
--
Dennis
KA6FUB

Here are two recordings, you will notice via the untrained ear that they sound slightly different (baud rate?). The signal is continuous for +10 minutes at a time. Not a short burst.
Firing up the active loop again...

73 Kriss KA1GJU