[Antennas] Balanced line optimum conductor spacing?

[Dan Richardson]

The correct formula is Z0 = 120*arccosh(D/d) where D is the center-center 
spacing, d
the diameter, and arccosh the inverse hyperbolic cosine function. With
this formula you can see that the impedance approaches zero as the wires
get extremely close together.

Danny, K6MHE



At 03:49 PM 1/5/2002 -0600, you wrote:

>Back in the late 1940's and early 1950's mycalex was used for spacers.
>The rule of thumb was 6 inch spacing with #12 wire was 600 Ohms,
>4 inch spacing equaled 400-450 Ohms.  Back then I used a 250 foot
>center fed with 6 inch spacing and it worked great on 160 and 80.