On Mon, 2 Nov 1998 01:36:44 -0500 "Dick Green" <dick.green@valley.net>
writes:
>
>I just got a great propagation program called WinCap Wizard. It has
>provision for entering gain and take-off angle data for up to three
>different antennas, and I'd like to try some predictions with numbers
>for my
>setup. I have an 80M Inverted Vee with the apex up about 65 ft.
>(probably an
>all-angle, all-azimuth radiator), a 40M 4-square with 60 radials per
>element, and a TH-7 on a 72' tubular crankup. I figured I would start
>by
>trying some theoretical numbers from the literature, but those sources
>probably won't give me much help with the TH-7 at different heights.
>Given
The freeware program YTAD, available through the arrl.org web site,
uses a four element yagi as its default antenna (actually its ONLY
antenna) and will draw elevation patterns at any height above ground.
It allows for flat or irregular terrain. That should be a close
approximation of your TH-7.
Incidentally, the freeware program MAKEVOA.EXE will convert the
YTAD output file to a gain vs elevation table, which can then
be selected as the antenna input to the freeware program VOACAP,
which will then do a state-of-the-art propagation prediction.
For a kicker, the freeware program VOAAREA will draw color contours
of your signal strength over any selected region of the globe. It's
all fun stuff to play with, and it's all FREE.
Dave Hachadorian, K6LL
Yuma, AZ
K6LL@juno.com
If it's free, it's for me!
Dave Hachadorian, K6LL
Yuma, AZ
K6LL@juno.com
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