Topband: Bury beverage wire?
dm4im at t-online.de
Wed Jan 17 11:10:04 EST 2018
Thanks to all.
I had a few direct responses to my inquiry.
I should haver better described the situation by expressing that it is
not a driveway, but rather an opening in a fence separating 2 lawns. I
just had no words for it in english.
One guy came up with the idea to thread the wire through tennisballs and
bury it in a conduit, so no portion of the wire would touch ground or
This seems like a good idea, but isn't just burying coaxcable , leaving
the shield open and only use the center conductor about the same,
without a bunch of unknown parameters?
Another suggestion was to bury coax and start the antenna after the
opening. Excellent, but last resort, because this would only allow a
180m long antenna. Still better than no antenna and better than most
hams can do.
W3LPL came up with what i think is the best idea:
Bury coax with high VF and put transformers on both ends.
This leads to another question:
What ratio do i wind the transformers? 1:9 at the feedpiont, 9:1 at the
beginning of the coax, 1:9 at it's end where the wire continues? Or do i
measure the impedances to calculate a ratio?
Do i put in a ground rod at each end of the coax to connect the
Do i connect both sides of the transformers to ground?
If i get this to work, i have a 230m-235m long antenna with 5m of it
Ohne CW ist es nur CB..
73, Martin DM4iM
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