Topband
[Top] [All Lists]

Re: Topband: RX antennas

To: <ve3zi@rac.ca>, "Topband" <topband@contesting.com>
Subject: Re: Topband: RX antennas
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Tue, 11 May 2004 08:34:24 -0400
List-post: <mailto:topband@contesting.com>
> I could never find any correlation in England, but
> here I note that the dipole is usually better during
> periods of high geomagnetic activity, and I presume
> that high angles predominate at that time. It is not
> however often helpful that I can hear well when my
> transmit signals are being more or less totally
> absorbed!

I see the same effect here Roger but almost exclusively at
sunrise or sunset peak or when the band is very disturbed
with magnetic storms.
At the same time, the Beverages and phased verticals will
have almost no directivity.

I think what happens is the signal is arriving from multiple
directions or at very high angles, and the low angle
antennas simply become useless. It isn't so much that the
low dipole is doing anything special, as it is the other
antennas are not focused on the signal.

Again I'd emphasize the effect is rare here, not common.


_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband

<Prev in Thread] Current Thread [Next in Thread>