[TowerTalk] Homebrew 30m beam

[Mike Fatchett W0MU]

Jim,

I am with you on the more gain and coverage.

I got a suggestion to just remove the coils and replace with aluminum 
and the element lengths are the right length for 30m. Time to hit the 
modeling software.

W0MU


On 4/30/2024 1:27 PM, Jim Brown wrote:
> On 4/30/2024 11:56 AM, maflukey at gmail.com wrote:
>> Just a question - but why Moxon 30m and not just 2-el?    Moxon
>> advantage on 40m is the improvement of performance bandwidth compared to
>>   "typical" design with shortened 40m elements.   30m band is only 50 
>> khz
>>   wide, which can be nicely covered even with shortened elements.
>
> Excellent observation, especially the word "performance" with respect 
> to bandwidth. For all practical purposes, SWR bandwidth matters only 
> in terms of making power amps happy (like the 87A). What really 
> matters is bandwidth of the desired radiation efficiency and directivity.
>
> Also, which variables are important can strongly depend on where we 
> live. Those on the east coast, for example, care a lot about F/B. Here 
> on the west coast, I don't care about F/B, placing primary importance 
> on forward gain and beamwidth over the needed bandwidth.
>
> 73, Jim K9YC
>
>
>
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