The very BEST magnetic loops are incredibly inefficient, yet like any "incredibly inefficient" antenna one can make amazing contacts on them when conditions are right.
The problem is with resistive losses. The day we have room-temperature superconductors, we will have efficient small transmitting loops. Until then, only a few percent of the power applied is radiated. For now, they are great when simplicity of setup allows operation where otherwise nothing could be done. 73, Ron AC7AC -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Phil Hystad Sent: Friday, April 21, 2017 7:45 PM To: Eddy Avila Cc: Elecraft Subject: Re: [Elecraft] Experiences using a portable HF loop The May 2017 QST not only does a review of the Elecraft KX2 but it reviews the Alpha Antenna, 10-40 meter support. This is a magnetic loop antenna and I think it retails (basic model) for $299. 73, phil, K7PEH > On Apr 21, 2017, at 6:24 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] ______________________________________________________________ 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]
