[TowerTalk] How high is enough
K8RI
K8RI-on-TowerTalk at tm.net
Wed Jul 31 00:36:54 EDT 2013
On 7/30/2013 10:57 PM, Jim Brown wrote:
> On 7/30/2013 7:46 PM, Jim in Waco wb5oxq wrote:
>> When choosing a height for a beam is 1/4 wave above ground at the
>> lowest frequency enough? 1/2 wave? I see Force 12 rating the gain on
>> their beams at 74'1".
>
> The best answers to your question are in the ARRL Antenna Book. It's a
> real bargain, especially because it includes a CD with a starter version
> of NEC, a nice program that computes loss in transmission lines, a Yagi
> modeling program, and HFTA, which helps answer the question you just asked.
Some time ago, there was an article in QST addressing antenna height Vs
distance, band, and band conditions. It showed sarcastically how often
an antenna for a specific band at various heights would be best for
specific distances. It was a very well done study and "I think" with in
the last year or two.
73
Roger (K8RI)
>
> 73, Jim K9YC
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