[amsat-bb] duplexer used as a filter

Paul Stoetzer n8hm at arrl.net
Tue Jul 28 00:47:24 UTC 2015

None of the commercially made duplexers that I know of are made for
outdoor service. Use the top half of a milk jug, run the cable through
the top and seal off the top of the jug. Put the duplexer inside.
using the top half of the jug as a rain shield.

That should keep 95% of the rain out of the duplexer.


Paul, N8HM

On Mon, Jul 27, 2015 at 8:38 PM,  <kb2m at arrl.net> wrote:
> I'm trying to setup a remote sat station and need help with a desence
> filter.  I was using a Diamond MX72-n and was experiencing water intrusion.
> I then checked the archives and consulted the group and went to the
> recommended Comet CF-416. Guess what, I'm still getting water into the
> duplexer. I thought that it was more suited to outdoor service on the
> recommendation of the group. So, before I take apart one of the duplexers to
> attempt to waterproof, does anyone know of a duplexer that is designed for
> outdoor use on the tower? I really don't have the room for a 12 foot +
> crossboom, so I need to resolve the desence with the duplexer.  Any
> suggestions from someone who has solved this?
> 73 Jeff kb2m
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