Gary, was your 140 ohm WD-1A made from .0393 (1mm) diameter wires, spaced
.118 center-to-center? My math says that should be a little over 140 ohms.
But the stuff I was talking about was a different diameter and spacing
(.033 diameter and .0685 center-to-center spacing.) The same math says it's
~115 ohms, but I had no way of measuring a piece less than a foot long.
73, Mike
www.w0btu.com
On Mon, Jul 23, 2012 at 1:49 PM, kd9sv <kd9sv@comcast.net> wrote:
> Mike, the measurements I took here on a short (300ft) WD-1A with average
> height of 5ft using the method W8JI recommends with a termination resistor
> (pot) and MFJ-259 showed an impedance of 140 ohms on both 160 and 80
> meters.
> I did not attempt to measure at higher freq's...de gary, kd9sv
>
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