> >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 :-). >
This is the line loss calculator that you can take to the bank (or even the doctor's office) because VK1OD always does his own thinking and he gets it right: http://vk1od.net/calc/tl/tllc.php As expected, a site search shows several references to N7WS :-) 73 from Ian GM3SEK >-----Original Message----- >From: [email protected] [mailto:elecraft- >[email protected]] On Behalf Of Wes Stewart >Sent: 17 April 2013 05:02 >To: [email protected]; Ron D'Eau Claire >Subject: Re: [Elecraft] KX3 remote transmitting > >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 <[email protected]> wrote: > >From: Ron D'Eau Claire <[email protected]> >Subject: Re: [Elecraft] KX3 remote transmitting >To: [email protected] >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 > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[email protected] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
