The formula given was in wavelengths so that would give you a spacing of
20 - 30 feet depending on frequency. I'd go with the 30 foot spacing.
John
-----Original Message-----
From: Bill Coleman
To: alsopb; towertalk@contesting.com
Sent: 8/7/2001 3:04 PM
Subject: Re: [TowerTalk] optimum height
On 7/28/01 9:15 AM, alsopb at alsopb@gloryroad.net wrote:
>I queries WX0B about the rule of thumb regarding "optimum" stacking
>height.
>
>Here was his response:
>***********************************
>For HF antennas over ground, W2PV did the math correctly and the
>formula is SQ rt of boom length is the widest stacking distance you
>should use on a yagi. The results are in boom lengths just as you
>state.
I'm sorry, I hate to quibble with the experts, but this doesn't seem
reasonable.
If I stack two A3S antennas, with a 14 foot boom, that's 3.7 feet? That
seems unreasonably close.
Or did he mean 3.7*14 feet, which would be 52 feet?
So,
widest = boom length * ( boom length ^ 0.5 )
?
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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