I have a vertical slide window in my ham shack. In order to feed my coax
fed antenna systems through it, I have made a 3/4" thick piece of partical
board, about 6" tall amd ,mounted a couple BNC feedthru adapters in it.
This works quite well for coax. The window frame itself is plastic.

I would like to use a balanced tuner in my shack, about 2 feet from the
window, and feed ladderline to my antenna.

Question: What is recommended to feed the ladderline through the
particle board? Could I just drill and mount a couple #6 brass bolts with
solder eyes on each side of the board and use it to connect ladder line, or
is something else recommended? Will this have any measurable effect on
efficiency?

Thanks.


Ed K7AAT