[Antennas] Dipole Height

[Ray, W4BYG]

I don't think I agree with this suggestion.

At 40 meters typical RG-8 cables losses are much less for 90' to 100' of 
cable, than the significant gain in low angel of radiation that would 
occur with the higher installation.  RG-8 cable loss at 7.2 MHz for 100' 
at a VSWR of 1:5 to 1 are about 1/2 db.  See:

http://www.kc7hxc.us/links/radio/Coax%20Calc/Coax%20Calculator.html

With antenna height of 7' AGL most of your energy is NVIS and going 
straight up and down warming the clouds and worms.  At 90', most of your 
energy is going out on the horizon at good angles where it should be, 
for DX contacts.

Big difference!

73,
Ray, W4BYG


On 9/17/2015 10:05 AM, David Robbins wrote:
> once you factor in the extra loss for the feedline needed to get it up that high the improvement will be negligible.
>
>
> Sep 17, 2015 09:34:15 AM, jkolin at optonline.net wrote:
>
>
> Hey Ray,
>
>
> Will my 40 meter dipole work better for DX at 90 feet above ground
> instead of 7 feet above?
>
>
> Jay...NE2Q
>
>
>
>
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