That CATV hard line is pretty low loss, so the excess loss from the
small mismatch isn't much. I wouldn't worry too much about the impedance
mismatch if your radio has the tuner installed. Hook everything up with
the CATV hard line, no Unun, and if the tuner makes the radio happy,
declare victory. Especially if the installation is temporary, don't
sweat 15M and above -- at the solar minimum, there's not a lot happening
on these bands for a few years.
Also, I suggest that you check the feedpoint Z with a good antenna
analyzer right at the antenna. Depending on your soil conductivity, 35
ohms is pretty optimistic.
73, Jim K9YC
On 3/31/2020 9:39 AM, [email protected] wrote:
I'm about to pull the trigger on a Hustler 6BTV (6-Band, 80, 40, 30, 20, 15,
10 meters). It will be temporarily installed (with radials) about 200' away
from my house. I'd like to run CATV "hardline" but I'm not sure how to get a
2:1 UnUn with a wide enough bandwidth on the antenna side (the impedance
with 60ish radials should be in the 35ohm range).
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