Every situation is probably a little different but I have a 100 foot
tower with TH-11DX, 7 element 6 meter and 13 element 2 meter
antennas. I have been shunt feeding it on on 160m running full legal
limit without problems. My thinking would be that the choke is just
a small inductor at 160m and probably doesn't have much RF voltage
across it. Being so far up the vertical it probably has little
current through it. In any case, mine has not had any problems.
73,
Paul N1BUG
On 10/16/2018 04:34 PM, Speer, Douglas via TowerTalk wrote:
> I have a phillystran guyed tower holding a Hy-Gain TH11DX and a
> Force 12 Delta 240 stack. The stack is turned with a small prop
> pitch motor. The TH11DX utilizes a LPA driven element combined
> with passive reflector and director elements. The LPA driven
> elements are RF insulated from the boom but DC grounded through a
> small choke located at the 10m end of the LPA (out of reach from
> the tower).
>
> Am I thinking correctly that I probably should NOT consider shunt
> feeding the tower or feeding it as a half sloper for risk of
> damaging the small choke or the prop pitch motor? I would at
> times be running full legal limit to the antennas.
>
> Doug, W5WTX Amarillo, TX
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