Message-ID: <006601c0767b$3e0f02c0$0b29f7c2@oemcomputer>
From: "John Rabson" <word.factory@zetnet.co.uk>
To: rsgb_lf_group@blacksheep.org
References: <3A531C89.2032.BB2276@localhost> <3A54B293.13773.446063@localhost>
Subject: Re: LF: Large and small antennas
Date: Thu, 4 Jan 2001 18:22:01 -0000
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----- Original Message -----
From: Mike Dennison <mike.dennison@rsgb.org.uk>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, January 04, 2001 5:27 PM
Subject: Re: LF: Large and small antennas


> Well, here we get into the very muddy waters of just how you
> measure ERP - seemingly a very imprecise science. Also the far
> more interesting area of matching the antenna to the propagation
> medium (sometimes referred to as ionospheric matching). An
> example of this is the idea that a "useless" horizontal antenna - or
> the horizontal part of an L - can in some cases give an improvement
> on the pure vertical because of the way the signal is presented to
> the ionosphere. And this is another area where the unreliability of
> the technique makes it a taboo area for the commercials but a
> potential source of gold for us.

If I can run out a quarterwave at 136 kHz will this be any use e.g. for NVIS
paths?

73 de
John Rabson G3PAI