Re: LF: RE: 503.6kHz Test

["James Moritz" <james.moritz@btopenworld.com>]

Dear Gary, LF Group,

This is what the signal looks like for about 11/2 hours up to 2200utc. The 
red signal is G4WGT, the yellow one is G4JNT's WSPR beacon. The blue line is 
the noise level scaled to about 300Hz bandwidth, to give an idea of the 
audible strength as a CW signal. The plot settings are not ideal to show 
variations in signal level - there are actually short periods where the 
signal fades to inaudibility that don't show up here, but it gives a 
reasonable idea.
G4WGT I think must be mainly sky wave here so presumably the fading is due 
to  different sky-wave paths.  G4JNT is a very stable ground wave signal 
here during the day, so I imagine the fading here is due to the combination 
of ground wave and sky wave.
Cheers, Jim Moritz
73 de M0BMU

WGT_JNTplot.jpg
Description: JPEG image