Vince, Just for fun I swept the mode-J filter with an analyzer. The isolation was good enough that it didn't matter with the 2 meter side was terminated or not.
73s, Alan WA4SCA <-----Original Message----- <From: amsat-bb-boun...@amsat.org <[mailto:amsat-bb-boun...@amsat.org] On Behalf Of Vince Fiscus, KB7ADL <Sent: Monday, January 20, 2014 4:06 PM <To: amsat-bb@amsat.org <Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink < <At 07:09 PM 1/19/2014 +0000, Jim Jerzycke <kq...@verizon.net> wrote: <>Buy a diplexer, and connect it as shown in the linked article: <> <> <>http://www.amsat.org/amsat-new/articles/Mode-J/ <> <>I also tilt both of my Yagis so they're 45* to the boom, <which makes them <>90* to each other. <> <>Yes, I lose some signal on terrestrial use, but ti helped cut the <>coupling, and desense, down quite a bit. <> <>73, Jim KQ6EA < < <One thing I've always wondered about this is, would one what to <put a 50 ohm non inductive resister on the 2M output of the <diplexer? or shouldn't that make much difference. < <KB7ADL < < < <_______________________________________________ <Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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
