[OKDXA] VU7

[Bert Aaron]

Gene,

Just ran a plot of two 5 element Yagi's, over flat terrain, one at 151 feet
and the other at 55 feet. According to HFTA the antenna at 55 feet has a
gain of 15.0 dBi at 17 degrees and a gain of -0.5 dBi at 2 degrees. The same
antenna at 151 feet has a gain of 15.5 dBi at 7 degrees and a gain of 7.5
dBi at 2 degrees. That is a difference of 8.0 dB due to the change in
height, at 2 degrees, and probably explains the problem.

73,

Bert  K2BA

-----Original Message-----
From: okdxa-bounces at mailman.qth.net [mailto:okdxa-bounces at mailman.qth.net]
On Behalf Of Gene Lewis
Sent: Saturday, December 09, 2006 9:53 AM
To: n5ok at arrl.org; Discussion of OKDXA
Subject: Re: [OKDXA] VU7

Roger that, Coy,
Sure wish I could run the antenna on up a ways but don't have that 
option...heavy sigh 8-<
----- Original Message ----- 
From: "Coy Day" <n5ok at arrl.org>
To: "OKDXA" <okdxa at mailman.qth.net>
Sent: Saturday, December 09, 2006 9:48 AM
Subject: [OKDXA] VU7


> Gene,
>
> Bert is absolutely correct in that the take off angle for that part of the
> world is absolutely critical.  On 20 meters with the antenna at 55ft your
> take off angle is way too high.  You would have a better chance on 15 if
> the band would open.  :-(
>
> Coy
> -- 
> Coy Day, N5OK
> 20685 SW 29
> Union City, OK 73090
> 405-483-5632
>
>
> _______________________________________________
> OKDXA mailing list
> OKDXA at mailman.qth.net
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