[TowerTalk] Elementary question about Skip

[John Langdon]

Possible explanations:

1) These guys aren't hearing them either - they are re-posting stuff they
see on eHam or DX Summit.
2) They have much, much better antennas and/or locations than you do.  I
remember W5VA, located out on a peninsula surrounded 260 degrees by
saltwater, used to hear stuff S4 that could not be heard by other stations
less than 2 miles away.
3) There is in fact different propagation.  Imagine the kind of selective
fading you hear on SW Broadcast or AM stations at night, then spread out the
time cycles to tens of minutes or the space diversity to tens of miles, and
you will see how it can happen.  I have repeatedly seen stations on 160 that
K5NA (about 50 miles East of me) could copy that I could not.  Sometimes
they can be heard at my place earlier or later, but sometimes I never hear
them.

73 John N5CQ

-----Original Message-----
From: owner-towertalk@contesting.com
[mailto:owner-towertalk@contesting.com]On Behalf Of Jonathan Kaplan
Sent: Wednesday, October 13, 1999 10:34 AM
To: Towertalk@contesting.com
Subject: [TowerTalk] Elementary question about Skip


OK Gang,
        Here's a question I feel I should know but don't. I just
finished installing an expensive tower-antenna combo.
It's a M2 40m dipole above a TH7DX on the top of a
US Tower HDX555. Now, I'm pleased generally with the
setup, except I can't figure out the following:
I often get listings via the local DX Spotcluster, posted
by local hams of interesting DX spots, but more often
than not, I get nothing when I tune in.  Now, I don't expecct
to be able to hear an internet-gated spot posted by a ham in
another state, but many of these spots are from hams within
50 miles of me. Can someone explain this phenomenon and
what rule, if any, is there about the footprint on the ground
of a DX skip?

Thanks

CUL
Jonathan KO6XS


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