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Mal,
if you had asked me why you can't see things
on my own grabber, I could have told you about a dozen known
plagues. Some from the vicinity (like the battery charger in one
neighbour's garage at 136.9), some more distant (like the tremendous Luxembourg
cacophony around DCF), and some are intentional (like the 10 minute outages when
the RX is switched to the NavSpaSur moon echo).
But you asked about the noise floor at the DK7FC
grabber. Well if I believed I could point out any specific deficit there, I
would simply tell Stefan about it, and (knowing him), I'm sure he would
have it fixed by the very same evening ;-)
Seriously, I would not even try to come up with a
general answer. There are many possible causes why some signals show up in some
places better than in others. Your receive site may be more RF quiet,
or your high antenna more immune to local mains-borne QRM, or your next-door
neighbour may just not have a certain brand of DSL router. G3KEV may
perhaps benefit from a more northerly location, closer to the shore, or further
from Mediteranean QRN activity. There's a lot of spatial and temporal
variability in propagation. In the end, it also
depends on how much of your lifetime you are willing (and allowed) to spend
sitting before of a transceiver.
Best wishes
Markus (DF6NM)
Sent: Wednesday, February 09, 2011
7:13 PM
Subject: LF: Re: Re: OE5ODL over
different paths
Markus
How do you explain the reason that I can work ES6AM
and EW6GB at good OOO copy yet these stations are not visible on the DK7FC
grabber. I have my theory but prefer to hear what you have to say
This also applies to other stns like RN3AGC which
are good copy with me but agn not visible on other grabbers like
DK7FC
This has been my most recent observations when I
have been in QSO with these stations.
De Mal/g3kev
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