At 06:09 AM 2008-10-13, Andree Schanko wrote:
>I erected today a new EWE for 160m NE direction.
>This year I have another place for the EWE .
>My dimensions are: height 5 m (16ft) length 30m (98 ft)
>In ON4UNs handbook are max. 15m length and 5 m height recommended.
>Whats the problem with more horizontal length???
>vy 73 Andy DL8LAS (DR5X)
> <http://www.dl8las.de> www.dl8las.de
> <http://www.darc.de/distrikte/m/11/> www.darc.de/distrikte/m/11/
Andree,
It appears that using the 30 meter length increases the gain by about
4 dB, but decreases the F/B from about 22 dB to about 15 dB on 160m
(at a 10 degree takeoff angle). This is with #14 wire, a 900 ohm
load, and average MININEC ground.
However, if you also want to use it on 80m, the forward gain
decreases by 2 dB and the pattern gets bad, with nearly zero F/B and
about 5 dB more gain broadside than endfire.
73, Terry N6RY
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