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I've had good results using LMR400 (outer conductor) and an air dielectric tuning cap which will handle the 10-15W power of a KX3. In some informal testing comparing a 6 foot diameter loop and a 1/4 wave wire antenna (40 meters) using a car chassis as a counterpoise, the loop beat the wire by 5dB (NVIS path) (C/N on spectral display). How efficient is the loop? I don't know - not as efficient as a 4" diameter copper pipe 6 foot loop, but I do know it's relative ;) A mobile whip is *very* inefficient. The loop in this case is generally *less* inefficient :) You can make contacts on both. K4HKX did a very detailed comparison of loop antennas with full dipoles and other HF antennas. He posted his results here: qrz.com/db/k4hkx Very interesting read. I'm playing around with a mobile loop idea for 80 and 40 meters using the KX3. If it works as good as I think it will, it should give me about the same performance as adding a KXPA100 - or not... that's why playing with ham radio is fun. 73's Steve WD4SDC On Fri, Apr 21, 2017 at 9:24 PM, Eddy Avila <[email protected]> wrote: > Greetings all, I'm curious to hear from anyone using a portable HF > magnetic loop. I've read the theory behind them so I'd like to hear your > opinion about them? How efficient these antennas are, especially running > qRP. > > > Thanks all, > > > 73 > > > ed > ______________________________________________________________ > 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] > ______________________________________________________________ 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]
