Bob W6CYX has metaphored the OTH radar for a war drum. That radar is believed to come from the south eastern part of China. It covers almost all of CW portion on 40m all day long. A source says it is a harmonic of 1.8MHz. Anyway, very noisy. It makes me give up operating radio in the evening. It could have been very quiet on 40m. I could have enjoyed nice QSOs with all over the world in our evening hours. I surely miss the good path to the western Eu at this time in a year.
Bob's comparison of it to a forerunner of a war is quite correct. Very meaningful. When there is more strain in the eastern Asia, they would run more radar. It might be related with the increased tension by chinese new ADIZ at present. We could do little for this problem. A friend of mine in the US has sent a claim on this OTH to a Chinese consulate there. I have enjoyed his idea and have approved him for that at that time. But I don't think the fanatic military would stop the radar owing to such complaints.
Why on the amateur band? No one knows that. It could be a military demonstration to hams in the world. I don't understand why the military officials in China realize such a demonstration of their power makes much antipathy among hams. Is the radar effective against stealth planes? Isn't is a technology in the last century?
Drew VK3XU used to collect reception information for this radar on the amaeur bands from various parts of the world. From what direction and how strong etc? He told me he and the group would report on it to IARU. This invasion to the ham bands is illegal if it is from China, one of the IARU members. I believe all we could do is working on through such an international organization as IARU.
I hope this drum would be calmed down very soon.