The elements are "linear-loaded" . They are folded back on
themselves.
The phsical length is 70ft.,But the electrical length is 210ft. long
!
Now, is this strange dipole a 140ft. long,OR is it 420ft. long ? ?
That's why the feedline is so much problem............I've built
over
2 doz. antennas;this one IS tricky ! I have only 1/8 acre of land;
Hence the problems with dipole lengths,and feedline lengths.....:-)