[TowerTalk] K7C - One-Way Propagation?

[W0MU-Mike Fatchett]

They were booming in here on 40 and 80 CW this am.  Worked them with 400
watts and an R8 Vertical on 40 and a random wire on 80.

Whatever they have there works to the states anyway.

Mike W0MU 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of
donovanf at starpower.net
Sent: Monday, October 03, 2005 10:06 AM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] K7C - One-Way Propagation?

Bill,

In my experience, "one-way propagation" is primarily a result of large
differences in the noise and interference environments 
on each end of a propagation path.   This is a very common 
phenomenon when one end of a 160, 80 or 40 meter path is in full daylight
and the other end is in full darkenss.

On the daylight end of a 160, 80 and 40 meter path, the D layer
significantly attenuates atmospheric noise and adjacent frequencies are not
typically occupied by strong signals.  On the full darkness end of the path,
atmospheric noise is significantly elevated and nearby frequencies are often
occupied by very strong signals.

73!
Frank
W3LPL