I've been using 300 ohm stuff from the Wireman for several years now. I bought a 500 ft. roll of it, and have never regretted it. It has small "windows", like 450 ohm line does, so it doesn't act like a sail when it's in the air. I believe the difference in loss is negligible compared to 450 ohm line, and it is so much easier to work with. FWIW, I recommend it.
Dave W7AQK ----- Original Message ----- From: "list1" <[email protected]> To: <[email protected]> Sent: Thursday, July 16, 2009 6:09 PM Subject: Re: [Elecraft] OT: Balanced Feedlines > Hi Don and All, > > I don't know if 300 Ohm ladder line is small enough for you, but at 20:1 > SWR > 100 feet of it loses about 1.1 dB total. See the chart for 450 Ohm line > at > the center of this page: > http://tinyurl.com/m5rjww > > The loss for 100 feet of 450 Ohm line at 20:1 SWR is about .65 dB total. > I > had calculated that the loss of 300 Ohm line in a similar situation is > about > .5 dB worse. The 300 Ohm is really hard to see when put up. I used it > for > Field Day, see: > http://tinyurl.com/luwagy > > At the Wireman web site it describes its "562" 300 Ohm ladder line as > being > able to take full power. > "300 ohm, 18 AWG, 19 strand copper-clad steel conductors, poly-clad > 'window' > for full power VF .91" > > The Wireman is at: > http://tinyurl.com/mdkvtm > > > 73, > Steve, W2MY, AAR6CX > > > -----Original Message----- > Behalf Of Don Rasmussen > Subject: [Elecraft] OT: Balanced Feedlines > > Can anyone suggest a compact balanced line that can handle 1000 watts? I > like the size of that Radio Shack 300 ohm TV line, but 100 watts is likely > the maximum. I'd like to build a stealthy KW antenna. The 20m dipole > radiating elements are so low to the ground that 3:1 SWR is the best I can > get. If I tune this out with a tuner, there will be too many db's of loss > over the 100 feet of feed required. I assume a KW would melt the TV line. > Any suggestions? Don... > > ______________________________________________________________ > 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
