Anyone interested in magloops should visit www.alexloop.com by Alex, PY1AHD. He has really pioneered the popularity of small, portable loops and has built many experimental loops. There is a video of him setting up an AlexLoop in 90 seconds (not rushed) at www.alexloop.com A magloop inside a backpack next to the human body probably won't work because the loop is detuned by the human, and that tuning varies with the distance. If you are walking, tuning would be difficult because the pack will jiggle, varying the distance--unless you could glide motionless over the ground (or water). I suspect Wayne could do this, but probably not in public. Even when you use a magloop on a tripod, you have to tune it using an offset so it is in the right place when you step away. This quickly becomes intuitive once you know how much, and which way, to turn the tuning capacitor. However, a loop mounted above the backpack, say on a folding stick, works and has been done. See www.alexloop.com A small loop does work--I have made contacts on a 3ft diameter AlexLoop on 40m SSB with 5w. On 20m, it could be smaller and still work, though obviously with less efficiency. The advantage of magloops is their small size, quick setup, and needing neither a counterpoise nor more height above ground than one loop diameter. If you go to a public park and want to talk to a ranger, setting up a magloop will materialize one as if by magic. Magloops are terrific chick magnets, kid magnets, and will get you in heated arguments with people who have never used one. I have no commercial relationship with Alex, PY1AHD, but I count him as a mentor and friend. Really, look at the portable magloops on his website. www.alexloop.com 73 Eric WD6DBM
Sent from Yahoo Mail on Android ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
