Sounds like you would have the Wire Antenna Element going from
the Insulator up the Tree to the Limb and back down the Tree to
the Insulator. Then from the Insulator via the Feed-in-Line to
the Radio in the House. Yes you have a Loop but it is so
narrow and thin that it effectively a Vertical Antenna and thus
basically an Omni-Directional Antenna. You could use 300 Ohm
Twin Lead or Coax Cable with a Balun; plus a Ground Rod and
Wire at the base of the Tree.
NOTE: Using a 'thin' 'narrow' Vertical Loop Antenna like this
can help reduce the Man Made Noise that a vertical antenna is
more susceptible to picking up.
You may wish to read:
"Above-the-Fence Field SWL Antenna for a Field Radio"
The basic Antenna design used for this Field Antenna can be
adapted to many individual situations including your Vertical
"Up-and-Down" the Tree Loop Antenna.
iane ~ RHF
Some Say: On A Clear Day You Can See Forever.
I BELIEVE: On A Clear Night...
You Can Hear Forever and beyond the Beyond !
If I shot a wire up over the highest limb of the fir tree in
my yard, and connected the ends to make a loop out of it and
ran the lead from the loop to the house via the insulator in
the tree trunk, would that be a good SW listening antenna -
would it have any directionality (just one loop but 100' or
so long) ?
Strength and Honor