[TowerTalk] TowerTalk Digest, Vol 87, Issue 76

[Roger (K8RI)]

W5KI wrote:
> Dan,
>
> I concur with the other posters here, full-size elements, with some  
> bends would be preferrable, in my opinion too.  The variation of  
> extending the two dipoles out as close to 90 deg perpendicular to each  
> other is a good idea also, 
There's a trade off when doing that. The farther you get the two apart 
the more they operate as independent antennas.  The closer you get them 
the more they interact. There is a point  where there is some 
interaction that also adds bandwidth which I would think would be desirable.

73

Roger (K8RI)
> if space permitted.  But the main point is  
> that with the lot having 90 feet to use horizonally, before the 80m  
> ends would hang down, would make an effective antenna.
>
> And without going into any antenna efficiency issues, the fact that  
> using no coils/traps is: (1) less visible, more attractive and (2)  
> less failure points in the future, both mechanically and from weather,  
> ice, etc.  are two good reasons to use full-size wire elements if at  
> all possible.  Good Luck.
>
> Steve, W5KI
>
>
>
>
>   
>> ---------------------------
>>
>> Message: 5
>> Date: Wed, 24 Mar 2010 19:43:56 -0700
>> From: Dan <n5ar at air-pipe.com>
>> Subject: [TowerTalk] 40/80m dipole
>> To: TowerTalk at contesting.com
>> Message-ID: <4BAACDEC.3080804 at air-pipe.com>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> I would like to build and send to my son a coil loaded dipole for
>> 80/40m. He has about 90 feet space to hang it in. Has anyone  
>> information
>> on loading coil values and placement in the 90 ft dipole?
>>
>> Tnx, Dan, N5AR
>>
>>
>>     
>
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