[TowerTalk] 80m shunt and 160m shunt mounted on same tower

[Gene Smar]

Ted:

     On my 64 foot tower  I've got a shunt feed for 160M and a 
half-sloper wire (1/4 WL) for 80M on adjacent faces.  They're not both 
shunt feeds, I realize, but this should give you some reassurance that 
you can use your tower as a radiating element on separate bands.  I 
don't run an amp here so my series cap for 160M is a bread slicer 
variable in a plastic show box-like container.

      Good luck and let us know how it all turns out for you.

73 de
Gene Smar  AD3F


On 6/13/2021 9:16 PM, K9MA wrote:
> I've been doing that for decades. It's a 70 foot tower with a JK 
> Mid-Tri near the top, a D40 6 feet above it, and a JK CS3-JK on a 
> sidearm at about 50 feet. There are two gamma matches on opposite 
> sides of the tower. The 80 meter side has a second piece of tubing in 
> parallel most of the way up to reduce the inductance, Q, and peak 
> voltage. There are variable capacitors at the base of the tower, with 
> a relay to switch between bands.) I can provide more details offline 
> in a week or so.
>
> http://sdellington.us/hr/Tower%202019/Blog/Photos/Gamma1.jpg 
> <http://sdellington.us/hr/Tower%202019/Blog/Photos/Gamma1.jpg>
>
> (There are a bunch of ropes in the photo, but the near side is 80 
> meters.)
>
> http://sdellington.us/hr/Tower%202019/Blog/Photos/Tuner2.jpg 
> <http://sdellington.us/hr/Tower%202019/Blog/Photos/Tuner2.jpg>
>
> 73,
> Scott K9MA
>
>
> On 6/13/2021 5:30 PM, k8na wrote:
>> I am putting up a new tower. I want to have 80m shunt and 160m shunt 
>> mounted on the same tower. Does anyone have any experience doing 
>> this? What problems? The tower is a 60ft-er with 12ft of mast and a 
>> Mosley PRO C-67-3, 4el 6m yagi, and 2m/440 vertical.
>>
>> TU/73  ...  de Ted K8NA
>>
>>
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>