I've not seen an instance of using open wire line using two different wire
sizes (i.e., a different wire size of d1 and d2 for each conductor), if
that's what you mean. If it is then the answer is here:
https://www.rfcafe.com/references/electrical/transmission-lines.htm
Look under the heading of "Two Conductors in Parallel (Balanced) of Unequal
Diameters."
Z0= (60/ε½) cosh-1 (N)
N = ½[(4D2/d1d2) - (d1/d2) - (d2/d1)]
If that's still not what you need, I'm at a loss and it would require
mathematics to solve if it can't be found in a college-level transmission
line textbook.
Paul, W9AC
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of K1XX
Sent: Saturday, December 30, 2023 8:48 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Open-wire transmission line
Morning folks and Happy New Year to all. I am looking for equations, or an
on-line calculator, for open-wire transmission line using different size
wire. So far, I've struck out. Can anyone offer any help?
Thanks
73 Charlie, k1xx
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