IMX with random wires the only issue about length is to end up with an impedance at the ATU that it can handle and for it to be long enough to radiate efficiently. A short wire (< 1/4 wavelength) depends upon a very, very good "RF ground" or counterpoise system of operate with any efficiency. Above about 5/8 wavelength there is no length that radiates better than any other in general. Only the pattern changes.
As you noted, the so-called "magic" lengths that I've seen published are simply those that avoid a voltage loop (high impedance node) at the tuner since most ATUs are not designed to deal with very high impedance loads and if the rig doesn't have a good "RF ground" one easily experiences "RF in the Shack" issues. 73, Ron AC7AC -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Barry N1EU Sent: Tuesday, February 9, 2016 11:06 AM To: [email protected] Subject: Re: [Elecraft] Slightly OT: non-resonant wires I think the only important measurement is that it avoids being near a half wavelength on any bands. Are there really "magic" lengths to be used with 9:1 xfmr into a tuner? I'm skeptical. 73, Barry N1EU ______________________________________________________________ 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 Message delivered to [email protected]
