Re: ARLA/CLUSTER: Tem problemas de espaço use antenas em cabo coaxial e reduza o seu tamanho.

[Carlos Pinheiro]

O verdadeiro Ovo de Colombo...

E será que funciona ?  Isto é, que a perda em relação ao tamanho normal do
dipolo é aceitável ?

73 de CT1PT
Carlos Pinheiro

2009/8/18 João Gonçalves Costa <joao.a.costa  ctt.pt>

> The math and construction is very simple to each side of the dipole to 10m
> in 28.450mhz!
>
> This antenna can be designed for the lower hf bands to greatly reduce the
> overall size versus the standard dipole type for those who have limited
> space for low band antennas.
>
> Each side of the dipole is 0,66 x[(300/28.450)/4] = meters for one half of
> the antenna..
>
> I use a RG58 foam (celular type).
>
> The same math above in a more simple form:
> .66 X 75 / 28.450mhz = meters in length per side (We eliminate the extra
> division step by 4)
>
> Result is 1.73 meters per side, less 35% that its normal size.
>
> Mais informações em: http://www.hamuniverse.com/K4mmg2and6meter.html
>
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-- 
Carlos Pinheiro
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