[amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink

Jim Jerzycke kq6ea at verizon.net
Sun Jan 19 11:09:25 PST 2014

Buy a diplexer, and connect it as shown in the linked article:


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

On 01/19/2014 06:56 PM, Gabriel - EA6VQ wrote:
> Hi all,
> I have a coupling problem in my station when trying to work FO-29.  My 2m
> signal is completely blocking the 435 MHz downlink, and so I can't hear my
> signal off the satellite. I guess it must be something related to the
> distance between the two yagis. (I use the terrestrial horizontal yagis you
> can see at http://www.dxmaps.com/jm19hn.html ). With mode-B satellites there
> is no problem.  I have tried it with two different 435 receivers, and it's
> exactly the same.
> Anyone has had this problem o have an idea of the possible reason?  And what
> is more important, of some way to solve it?
> Thanks for any possible help.
> 73. Gabriel - EA6VQ
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