[TowerTalk] Turn 80m dipole inv v into something for 30m

W0MU Mike Fatchett w0mu at w0mu.com
Sat Oct 28 14:48:11 EDT 2017


The apex is at about 70ft so I can reach the ends without much difficulty.


On 10/28/2017 11:26 AM, Jim Brown wrote:
> On 10/28/2017 9:13 AM, W0MU Mike Fatchett wrote:
>> It is close to 3/4 wavelengths on each side which might be ok but the 
>> match is going to be bad.
>
> My high 80M dipole is fed with 160 ft or so of a good RG11, but even 
> with that great coax, there's far too much loss in the coax for the 
> antenna to play well.
>
>> It might just be easier to toss up an 1/2 wave V and not worry about 
>> the 80m.
>
> Since I have the trees, I had the climbers rig 30M dipoles when they 
> were in trees for another reason.
>
>> Suggestions or comments welcome! 
>
> How low are the ends? If I recall correctly from when I modeled the 80 
> dipole on 30, it was a bit short, so switching in some inductive 
> loading near the low ends of the V might do the trick.
>
> 73, Jim K9YC
>
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