[TowerTalk] Tower and antenna decisions

[Joe Subich, W4TV]

> Yes I have seem frequent times when my 50 ft high 10m yagi
> outperforms my 110 ft yagi.

50 vs. 110 feet on 10 meters is really a special case.  At 50'
you're already 1.5 waves above ground - a level that has a nice
broad (ca. 4 to 17 degrees at -6dB) vertical lobe.  At 110 feet
you're 3+ waves above ground three very deep nulls below 35
degrees.  That situation does not appear on any other HF band
with readily achievable tower heights (70/160' on 15 and 110/225'
feet on 20).

There are plenty of times a 35 foot high yagi will beat higher
antennas domestically and to Central America/Caribbean from
here in Florida but on balance high is still better for the real
DX paths.

73,

    ... Joe, W4TV


On 10/28/2013 5:56 PM, Doug Renwick wrote:
> Yes I have seem frequent times when my 50 ft high 10m yagi  outperforms my
> 110 ft yagi.  Usually the higher yagi is the best, but there are times when
> the signal is barley audible on the higher yagi, the signal is booming on
> the lower antenna.  Not always but there are times.
> Doug
> "Think of all the ways you can hurt yourself laughing."
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Richard (Rick) Karlquist
>
> I haven't observed any cases where the 40 ft high Yagi was better, but I
> could believe that could happen occasionally.  These tests were done on 20
> through 10
> meters.
>
> Rick N6RK
>
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