N7WS took a look at precisely this subject: http://users.triconet.org/wesandlinda/ladder_line.pdf
BTW I use 450 ohm ladder line here to feed a c.f. vertical wire doublet for multi-band operation using a balanced tuner - at least when dry, it's the best option to keep loss low and for mechanical reasons too. Bob NW8L On Tue, Mar 17, 2009 at 8:04 AM, Geoffrey Mackenzie-Kennedy <[email protected]> wrote: > Sorry for an off-topic question. Does anyone have any information about the > dry vs wet characteristics of "450 ohm" ladder line? I have never used this > type of line, but I might have to use it for "mechanical" reasons to feed > another antenna now being built. I am told that its characteristics change > when wet from rain, but which characteristics change and by how much at HF. > A remote ATU to compensate is not to be used with this particular antenna / > feeder. > > Any comment would be appreciated. > > 73, > > Geoff > GM4ESD > > ______________________________________________________________ > 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
