Jammers, OTHRs and E10 stuff...

This is the Jammer alone, as recorded today at 0446z on 6840 kHz.

Spectrogram:

Spectrum:

This is an OTHR (Over the Horizon Radar) found today at 0447z on 9130 kHz (another E10 frequency) which is not related (I guess!) with E10...

Pulse:

Spectrogram:

Spectrum:

And this is the Jammer who stops after an PCD2 transmission on 4270 kHz, yesterday at 1900z. (The other noises are just QRM.) The fact that the Jammer stops after the "null" xxx2 E10 transmission may be an indication that the Jammer posses a monitoring station somewhere and checks if he jams an actual message.