Intermod in Moosbrunn, 06 Oct 2019

[Ray Lalleu]

Early on the Sunday 06 Oct. 2019, from 0500 to 0530 UTC
I heard an intermodulation on 6335 kHz,
mixing Radio Japan in E and ORF in G.

I found the suspect frequencies :
6155 relaying the Austrian radio
5975 relaying Radio Japan (for just half an hour).

Probably a symetrical intermodulation is on 5795.

Of course, such intermodulation can happen in receivers or receiving antennas. But I have not seen anything like that in my present setup. And both the suspects came from the same transmitting site. And I got the intermod even using a tuned loop. And the intermodwas not very sensible to any degree of attenuation.

Probably I won't get up so early for days or weeks...

[Ray Lalleu]

on 12 oct 2019, at 0720 :

same intermod between 6155 and 5975,
intermod products on 6335  and 5795,
intermod products heard also using a tuned loop,
those intermods are on the air, not created in my antenna or receiver,
disappear at 0530 when 5975 is switched off.