[TowerTalk] Open-wire transmission line

[Paul Christensen]

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 at contesting.com> On Behalf Of K1XX
Sent: Saturday, December 30, 2023 8:48 AM
To: towertalk at 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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