[TowerTalk] Phased verticals one direction

[K8RI]

On 5/2/2012 2:24 PM, Rick Karlquist wrote:
> john at kk9a.com wrote:
>> It would be easier to just feed one vertical with a random length of 50
>> ohm coax and make the other vertical a parasitic reflector.
>>
>> John KK9A
>>
> There are 2 disadvantages to that.
>
> 1.  The front to back will be 10 dB at best, whereas with a driven
> array you can easily get 20 or 30 dB.  For receiving purposes, a
> driven 2 element array is as good as a parasitic 3 element array.

And on 40 you are likely too find the f/b will be far more helpful than 
gain in the forward direction.  Plus the verticals will discriminate 
against state side QRM.
Been there and done that.

73

Roger (K8RI)
www.rogerhalstead.com
>
> 2.  The bandwidth of a parasitic array is considerably less than
> a driven array.
>
> Rick N6RK
>
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