Topband: WD1A

[Mike Waters]

I think the characteristics of so-called WD-1 surplus phone line varies.
FWIW, the two short samples of WD-1 that I have here are as follows:

115 ohms impedance, calculated from the following: .033 diameter
(averaged), .0685 spacing. The dielectric constant of the insulation
(polyethylene) is 2.2.

I just made three transformers for someone using that line as a
bi-directional Beverage, but I think more tests need to be run to see how
it really works in actual practice. But so far, so good. :-)

73, Mike
www.w0btu.com

On Mon, Jul 23, 2012 at 8:43 AM, Tom W8JI <w8ji at w8ji.com> wrote:

> Has anyone ever made any attempt to characterize the line at HF?
>