[Elecraft] KX3 remote transmitting

Wes Stewart n7ws at yahoo.com
Wed Apr 17 00:01:34 EDT 2013


My previous message on this topic was composed while I was in a doctor's office waiting on my fiancee.  To gather some data on coax, I did some Google searching and found several "calculators" (that all seem to copy each other).  Another thing they have in common is that they all use the data I derived for "window line" which was published in an ARRL Antenna Compendium article I wrote.  All without attribution, of course :-).

--- On Tue, 4/16/13, Ron D'Eau Claire <ron at cobi.biz> wrote:

From: Ron D'Eau Claire <ron at cobi.biz>
Subject: Re: [Elecraft] KX3 remote transmitting
To: elecraft at mailman.qth.net
Date: Tuesday, April 16, 2013, 9:11 PM

That's how the commercial HF stations did it. Keep in mind they used real
ladder line and NOT "window line" that is frequently mislabeled "ladder
line". 

True ladder line has large diameter conductors (usually No. 12 or larger
wires) and only enough insulator bars separating them to keep the wires
stable. That's compared to the window line that has a brown (polyethylene I
believe) web between two much smaller wires with openings (windows) cut into
the webbing. 

Window line works reasonably well, but does not have the stability and low
losses of true ladder line, especially for long runs. One of its biggest
drawbacks is that moisture, ice, snow, etc., can change its characteristics
appreciably in spite of the windows. Ladder line does not suffer such
changes unless it's buried in snow or iced over. 

73 Ron AC7AC



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