I'd suggest this is a better question for Towertalk or the RFI reflector
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use your favorite
"retail" DX cluster.
On 7/6/2021 9:52 AM, steve WB3LGC wrote:
I'll ask a similar question...
I use a horizontal 80m loop fed with ladderline. I have a 1:1 choke
at the ladderline to coax connection with 10 feet to the tuner. My
noise is a lot less than it was long ago... The noise may be gone, or
the balun helps, or it was a different antenna. Should I change anything?
The real Q... Portable I use a 135' dipole with ladderline and a
choke at the tuner. Would I be better off using coax and a choke to
feed the antenna?? I do like the multi band capability of the
ladderline (450 ohm) center fed "zepp".
my choke is (2) FT240-31's with 12 turns RG-8x.
73, steve WB3LGC
On 7/6/21 12:33 AM, Robert G Strickland via Elecraft wrote:
Does the choke cause a significant sag in the antenna? For 40m maybe
not; my 80m dipole with a choke looks like a V antenna, and I'm
reluctant to increase the tension in the support ropes to the point
where the the antenna starts to flatten out.
...robert
On 6 Jul 2021 02:30, Jim Brown wrote:
An important part of the antenna system is a serious common mode choke
at the feedpoint if each antenna, so that current coupled from the
feedline doesn't fill in the antenna's nulls.
73, Jim K9YC
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