[Antennas] 80m EDZ for NVIS

[Rob Matherly, W0JRM]

Hi All!

I'm looking at building a NVIS antenna for the upper end of 80m. Using 
the calculator here supposes 450 ohm ladder line. I have none of that, 
but I do have a bunch of the black twinlead variety.

Would someone here be able to point me to a place where I can determine, 
or just tell me, what length of 300 ohm twinlead I'd need to use as a 
substitute? I'd be running 100W max so I don't *think* that would be an 
issue, but feel free to tell me otherwise.

https://www.westmountainradio.com/antenna_calculator_zepp.php?frequency=3.900

-- 
Thanks,
Rob Matherly, W0JRM
Centerville, Iowa - EN30nr
NAQCC #7688, FPQRP #-330, FISTS #19246, QRP ARCI #16952