Topband: Beverage antennas

[ZR]

----- Original Message ----- 
From: "Bruce" <k1fz at myfairpoint.net>
To: <topband at contesting.com>
Sent: Monday, July 23, 2012 3:56 PM
Subject: Topband: Beverage antennas


>
>
>
> Re Tom:
> An impedance error of 20 ohms on a 100 ohm line is as meaningful as an 80
> ohm error on 400 ohm line
>
> Thanks Tom for clearing that up. I tried early Saturday morning, while 
> very sleepy, to get this info out. A 680 ohm line Beverage with fence 
> wire, the error ratio is even higher.
> (Wide spacing is more RF forgiving, in terms of inches, than close spaced 
> lines).   But we do need to be accurate.


** Wide spacing is also more prone to unbalance wheras close spacing and 
twisting promotes good balance.


> A few years ago I had customer reports, stating they had run their two 
> wire, fence wire Beverages, fastened vertical with good results.  At that 
> time I switched a  300 foot horizontal run to vertical, and could not see 
> any difference.  Granted this was not an instant change A to B test, but 
> it sure is an easier installation.   I haven't seen anyone frequently 
> transpose their two fence wire Beverages in my area, but may be a good 
> idea.
>
> 73
> Bruce


** That barely qualifies as a subjective test and 300' for Topband isnt that 
directive/effective to start with.Try it at 1 wavelength or more in a 
controlled test.
Carl
KM1H





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