Re: LF: Luxemburg effect etc

[Markus Vester <markusvester@aol.com>]

Mal,

 

here in central Europe, muffled voices and music are audible on DCF and HGA every night, and often during winter days as well. Yes I'm sure it really is Luxembourg effect, aka ICM for ionospheric cross modulation. I find it hard to believe that you can't hear it -  maybe you're lucky in that you are located further away from potential ionospheric heaters.

 

Best 73,

Markus (DF6NM)

 

BTW I'm using a resonant Marconi for receive, connected to the passive mixer stage through a 30 dB attenuator.

 

-----Ursprüngliche Mitteilung----- 
Von: mal hamilton <g3kevmal@talktalk.net>
An: rsgb <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 27 Nov 2012 3:25 pm
Betreff: LF: Luxemburg effect etc

LF

I would suggest what most are hearing is not the Luxemburg effect but cross modulation, Inter Modulation, Rx front end overload all due to poor antennas or poor Pre amps ahead of the Rx or the RX itself 

Active uProbe antennas overloaded driving the preamp into non linear mode. Some amateur band receivers are more prone to this than others.

I have never had this problem using resonated wire antennas as long and as high as possible and NO preamps

 

de G3KEV