Hello Mike,
Enhancement from ground reflection is included
in the claimed gain figures....
The X9 and X7 specs are given on this page:
http://www.cushcraft.com/%20Ham/X9/X9.html
You will find that the gain is specified for both t/o
angle and height above ground:
X9 X7
eg: Max Gain (dB)
@ One Wavelength 15M 13.9 @ 12deg 13.0 @ 12 deg
So the antenna gain was calculated at 15m above ground,
which is probably an excellent height for a tri-bander.
BTW has anyone seen adverts or specs for the Bencher/Butternut
new antenna announced in May?
> Butternut has announced a new HF antenna designed by WA3FET,
> W9KNI and K3LR. It has 10 elements on a 23 foot boom.
Regards,
Martin ZL1ANJ
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