You could try a piece of twin (short) RG-58's tight together passing the
rotator,
shield connected to earth in one end.

-------------------0______________________________________0---------
To rig I 2 x RG58, piled together, passing
rotator To Ant.
-------------------0______________________________________0---------
I
to Earth

I've used this way to pass trough walls and sharp corners, so why not also
at the
rotator. It is NOT an optimum solution, but it kind of works... At hi
power, use
RG8 (or -lookalike).

N


KS7J wrote:

Please reply to the list or directly to me: shack AT tomochka DOT com.

Hello antenna mavens,

Searching high and low today for examples of feeding a rotating
antenna with ladder/window/open feed line. My idea would be to use a
standoff near the tower top (say, 3-4' perpendicular to the tower) and
drape a large loop of window line from the feedpoint to this standoff,
then route the remainder of the feed line down and away from the tower
using standoffs as necessary.

Anyone have experience with this sort of setup or can you suggest a
better one? Is there a rule of thumb for how large the loop should be
to accomodate a 450 degree turn?

I would imagine using a stranded conductor feed line would be
preferable given the amount of flex that may be inherent. How would
one stiffen the overall draped loop though to prevent it being blown
near metal in a breeze?

TIA es 73.

Please reply to the list or directly to me: shack AT tomochka DOT com.

- Casey

Think in terms of slip rings as a contacts between the ladder line and the feed
of the Yagi driven element.
Bob WA2EAW