A couple of people expressed an interest so here is a link to a presentation on my mag loop. It's a while since the presentation was given but the loop is still in service in the gamma match configuration.
https://www.dropbox.com/s/5va4ygzbd410le4/Prototype%20Magnetic%20Loop%20rev%20-.pdf?dl=0 Andy, k3wyc ________________________________ From: Andy Durbin Sent: Tuesday, January 19, 2021 5:39 PM To: [email protected] <[email protected]> Subject: Efficiency of MFJ remotely-tuned loop antennas "although I saw a design not long ago that used two coaxial copper pipes with a PVC pipe as the insulator. The inside conductor was mounted to a long threaded rod moving it in and out of the outer conductor." Not my original idea but that's what I have on my loop (PEX insulator not PVC). Works fine up to 100 W on 30 m but has SWR runaway at 150 W. Capacitor is driven by a geared DC motor and is tuned from the shack. Home brew is far more fun than buying commercial. I'll post a link to a presentation if there is any interest. Andy, k3wyc ______________________________________________________________ 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]
