Hi
Rik & Graham,
Thanks
for the replies.
All
understood now, the screen shot certainly shows it
up.
I
didn?t relate multi path fading to what I was seeing on the display as I am
normally used to seeing/hearing single narrow signals fading differently
from different sources. So I hope I am correct in saying that with the three
distinct signals from the NDB the additive & subtractive properties of each
multi path signal even though closely related in frequency will react so
noticeably differently at the receiver even from the same
source.
I
missed Grahams report on the UK500KHZ group.
73
Gary
? G4WGT.
I assume its selective fading , you
can see it at 100 Hz separation at >
add the shot with a few pointers ?
Nb .. check out the 500 band
in those day's , no mal-adjusted cw signals
Sent: Sunday,
December 28, 2008 3:15 PM
Hi
LF,
Just made an
interesting observation regarding QSB at
508KHz.
For my own
benefit I have started running a slow SpecLab showing 500 to 510KHz &
capturing for evaluation.
Occasionally the
NDB ?Z? shows up. The strange thing is that even though the carrier on 508KHz
& the two ID offsets at 509 & 507KHz are relatively close they each
display at different depth of fading or an out of phase fade
pattern.
I am unsure why
this should be, any comments please, see capture at link
:-
http://myweb.tiscali.co.uk/wgtaylor/ZNDB.jpg
73,
Gary - G4WGT -
IO83QP.
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