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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
