David J Windisch wrote:

Hi, all concerned:

Is this the balun problem?

For openers, a 40-meter half-wave dipole with trees and 3 dogbone
insulators, center-fed directly across the center insulator with 33 feet of
RG-59/U coax, nothing special,

TREE--o///o--------------o///o--------------o///o--TREE
| |
coax
feeder
drooping
down
33
feet
here
to
the
shack

you know, like that ASCII sortagraphic. Like the one I put up in 1957 or
1958.

The thing has voltage loops at all ends, including the shack-end of the
coax-braid, correct?

73, Dave, N3HE


You will have an imbalance with the antenna as described, not pictured.

The inner surface of the braid and the center conductor contains the rf
from your transmitter. The portion of the wire connected to the braid
does NOT get the same amount of power [current] as the portion connected
to the braid. So, one side of the antenna radiates more power than the
other. The coupled signal onto the external portion of the braid does
NOT cancel and you have RF on your coax.

Solution: Balun!