On Sat, 25 Apr 2009 17:29:15 -0400, Don Wilhelm wrote: >My reason: The paralleled line certainly will work, but the loss is the >same as a single coax of the same material,
I don't agree, Don. Loss in coax at HF is all I squared R. If you match to twice the impedance, you'll have half the current. This means that the fraction of the loss in the center conductor will be 6 dB lower at the higher impedance. On the other hand, the loss in most coax shields is lower than the loss in the center conductor, so I would expect losses to be about 3 dB lower, not 6 dB. >and in a multiband >situation, it certainly will be run at a high SWR. Agreed. This is not a good solution for antennas of random impedance. But it IS a good solution for antennas that match to about 2.5:1 or better. 73, Jim K9YC ______________________________________________________________ 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
