Thanks, Wes, for the "Ladder line" pdf. I really enjoyed reading it.
Both factual and entertaining.

The impedances Zo of the nominal 450-ohm lines were all on the low
side. I wonder if this was due to the manufacturer's ignorance?

Did he use the usual ratio of wire-spacing to wire-diameter to deduce
Zo and forgot to multiply Zo by the VF to reduce Zo to the value he
actually achieved?

Then, it he ever measured Zo, he thought his measurements must be in
error and just carried on making the stuff.

Thanks for the data.
----
Reg.
==========================================


"Wes Stewart" wrote in message
...
On Wed, 5 Apr 2006 21:09:10 +0100, "Reg Edwards"
wrote:

I should like to know the velocity factors which occur on various
twin-balanced transmission lines. We have -

Open wire lines with infrequently spaced, flimsey spacers.

450-ohm ladder lines of various sorts.

http://k6mhe.com/n7ws/Ladder_Line.pdf