Try this http://www.kb0nly.net/ant%20switch.html
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Elan Portnoy Sent: Tuesday, November 03, 2009 9:25 PM To: [email protected] Subject: [amsat-bb] Please help me design a polarity switcher... I have both vertical and horizontal elements of my 70cm yagi coming into the shack via separate runs of LM400. They meet in a box with bits of coax for matching and phasing before going to the radio. I would like to add a relay to make polarity changes quick and easy. Do I need to use a specific type of relay or will a garden variety DPDT from Radio Shack be sufficient? Thanks, Elan WB2IOL _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
