[TowerTalk] reversible Beverage

[Jim Brown]

On Wed,10/5/2016 9:47 AM, Bill via TowerTalk wrote:
>   I asked the guy from DX-Engineering if this would work and he wasn't sure since he didn't know what the impedance would be for the two wires.  So, here I am.

Bill,

I suggest that you ask K3LR. It was my impression that Zo of the 2-wire 
line was not all that critical, but I'm not sure of that. As to rolling 
your own -- the equation for Zo of 2-wire line is pretty well cut and 
dried as long as you enter the correct parameters. BUT -- the dielectric 
DOES affect Zo, and the best known equations are for bare wire.

There's a guy who sells nice spacers for open wire line at Dayton. He 
gives out samples, and I grabbed one. www.73cnc.com He says his spacing 
is for using #14 THHN for 600 ohms.

Obviously, there are many ways to skin this particular cat, and you 
could probably roll your own. Probably too big for your application, but 
I use short lengths of 1/2-in PVC conduit with holes drilled near each 
end as spacers for fan dipoles.

73, Jim K9YC