I have done some more observation on the Mongolian transmitters.
Here is the transmitter coverage map according to fmscan.org. I know that these predictions are approximate.
Here are the estimated reception levels to be expected in Novokuzhnetsk, Russia. Again these are approximate, though it does suggest 209 from Oglii should provide best reception at that location.
Here is what I observed from the Novokuzhnetsk SDR last night just after broadcasting started.
164 was barely visible but not listenable. I did not observe any activity from that particular transmitter. 209 was barely audible, which does maybe suggest that Oglii was off and the SDR was picking up signals from the other two transmitters on the same frequency but much further away. The signal from 227 was mostly listenable.
I did not observe anything at all from 882 and haven’t done so in a month or more. I haven’t been able to identify the shortwave transmitter on 4895 for even longer.
Here is a screenshot from earlier today just as the day’s broadcasting schedule was concluding.
227 is just visible. Again this was by far the best signal at the location of this particular SDR. 164 went off the air seconds later.
All I can tell from these fairly limited observations is that 164 and 227 are definitely still active, along with at least one of the 209 transmitters. The transmissions from Oglii have possibly ceased. The status of the transmitter at Choibalsan will be hard to determine as there are no SDRs near it (apart from Irkutsk which doesn’t seem to pick up anything on longwave). The medium and short wave transmissions on 882 and 4895, respectively, do not appear to be still active.
I hope this information is of some benefit to the community,
Regards, Conor (2023-06-29)