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Re: [TowerTalk] TowerTalk] portable verticals with crummy ground

To: ve3zi@rac.ca, towertalk@contesting.com
Subject: Re: [TowerTalk] TowerTalk] portable verticals with crummy ground
From: Jim Lux <jimlux@earthlink.net>
Date: Tue, 05 Jul 2005 07:08:13 -0700
List-post: <mailto:towertalk@contesting.com>
At 06:09 AM 7/5/2005, Roger Parsons wrote:
>My experience (admittedly really limited to 160m) is
>that it is pretty easy to get ~50% efficiency. It is
>pretty hard to get close to 100%.
>
>My justification for saying this is that at one point
>I had an inverted L (in a tree) with about a 50'
>vertical section fed against a few poor radials. I
>also had a 95' top loaded vertical fed against >150
>long radials about 400' feet from the inverted L. The
>difference between the two was certainly well less
>than 6dB. I also had a 300' vertical at my remote site
>(about 7 miles away) fed against 120 x 1000' radials.
>No great difference between that and the 95' vertical,
>although the DX characteristics were a bit different.
>
>Quite depressing really!


Or, perhaps, an incentive to do a "system design", especially for portable 
ops.  You might be better off with a big amp and a crummy antenna than 
barefoot and a good antenna that takes hours to set up.

For a permanent installation, you could have both the good antenna AND the 
big amp.


>73 Roger
>VE3ZI
>
>
>
>
>___________________________________________________________
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>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
>any questions and ask for Sherman, W2FLA.
>
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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