Hi Dave!

> However bad a system Powerline is, it does NOT generate noise at 
> 500kHz. It occupies 2-28MHz more or less with most of the devices 
> having very deep notches in the amateur bands.

Did not know that, thanks!

> 
> Wideband QRM like yours is far more likely to be switch mode psus (eg 
> unfiltered PC supplies) or low energy lightbulbs.

Yes, one single noise source I was able to track down was the energy saving 
bulb of my neighbours bedroom. Another source is my own Nokia cellphone charger 
:( 

But there is much much more out there.
I think it might be "something digital", thought it might be PLC, because 
sometimes the noise drops and increases rhythmically, like a multiway data 
transmission, somehow resembling a well used Packet Radio qrg.

vy73
Dennis
DL6NVC



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