[Antennas] 80m EDZ for NVIS

[Raymond Brown]

The 300 ohm twin lead would just be the feedpoint up to the balun. If you select the right Balun, you can feed it with coax. So basically you need to bring up a 80 m dipole 10 feet off the ground. 


Sent from AT&T Yahoo Mail for iPhone


On Wednesday, September 3, 2025, 1:13 PM, Rob Matherly, W0JRM <w0jrm at jrobertmatherly.com> wrote:

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
______________________________________________________________
Antennas mailing list
Home: http://mailman.qth.net/mailman/listinfo/antennas
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Antennas at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html