OK, checked it this morning, and 12180 kHz is indeed the Vietnamese jammer.
Or at least, it is on the same bearing as the siren jammers that are, at the
same time, attacking Radio Free Asia's Vietnamese service. Since those
jammers hit the Vietnamese service, the DF cut is right through Vietnam, and
Vietnam is known to use this type of jammer, I am going to call it
Vietnamese.

T!

"John_A" wrote in message
...
It sounds like a police siren, in AM mode, now at 14:15 z, any have an idea
what this is ?