In reply to OE7HPI:
From my observations this is definitely REA4, a Russian military station. It has been around for a very long time & occasionally pops up in the amateur bands.
For the benefit of everybody, the best way of dealing with this sort of QRM while activating is to simply find another frequency. There is no point trying to jam the QRM, or for those with the facility, trying to be louder by turning up your amplifier. This is a military station, with no doubt with much more power than any amateur has available & any attempt at drowning them out would probably only cause them to increase their power.
At least in this case the station is identifying itself & transmitting a clean signal that only occupies a narrow bandwidth (less than one SSB voice channel).
As already mentioned, we do not have “calling frequencies” as such on HF, & certainly no “SOTA exclusive” frequencies, although some frequencies have come to be seen as such due to their popularity with activators. The simple reason for this, is that a CQ SOTA call on a frequency regularly used by other SOTA activators is more likely to bring a response from a SOTA chaser who may be monitoring that frequency anyway. A SOTA chaser is more likely to understand that you are on a summit & may have limited time / battery power, whereas a “normal” amateur station who may be unfamiliar with SOTA will not.
There have always been problems with “Intruders” in the 40m band, long before amateurs in IARU Region one gained 7100KHz to 7200KHz, as it is a very useful part of the spectrum for broadcast & communication alike. While it is annoying to hear broadcast stations within amateur exclusive bands, it is far more annoying when a neighbouring government who may disagree with the content of such broadcasts decides to jam the broadcast. It is often this jamming, which is nearly always unidentified & much more wideband than the original station, that causes amateurs more problems.
As I mentioned earlier, the best way to deal with “QRM” of a military or government nature, in the short term, is to find another frequency to use. While it is nice to moan about it & get things off your chest, & certainly useful to know how others are receiving the QRM, there is little point moaning about it on here.
The IARU have a department who are dedicated to dealing with intrusion into the amateur bands & they have been quite successful in dealing with these issues over the years.
Below is a link to the IARU Region 1 website:
The best way to get QRM of this nature stopped is to report it, giving as much information as you can. On the lower left hand menu of the above page under the heading “Working Groups” you will see “Monitoring system (IARUMS)”.
This is the place to report intrusions into the amateur bands in IARU region 1. I am sure there is a similar facility for other IARU regions.
While you may see this as a big problem, it is not. This QRM will be removed from the 40m band within a few weeks if REA4 haven’t left of their own accord before then, & all you have to do is report it using the internet.
Wouldn’t it be lovely if that was all you had to do when one of your neighbours purchases a PLA networking device. Maybe this 40m QRM doesn’t seem so bad now does it?
Please feel free to disagree, but I am sure we will hear much more of this sort of QRM as Solar maximum approaches.