[Elecraft] 75ohm Impedance question K3S and Antenna side.

[Jim Brown]

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, AE4PB at carolinaheli.com 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).