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 <w...@w8ji.com> wrote: > Has anyone ever made any attempt to characterize the line at HF? > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK