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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Scott K9MA
k9ma@sdellington.us
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