[TowerTalk] Filter for one band

[Earl Morse]

Gary,

I also have the Dunestar filters (multiband) and run them in my SO2R setup and they work well.  They are pricey at $450+ for each radio.  Probably overkill for your application but they also make single band filters for about $75.
http://www.dunestar.com/store/ham-radio-bandpass-filters-cid-3-1.html 

ICE makes bandpass filters for single band at $75 a piece.
http://www.iceradioproducts.com/

A single 80M bandpass filter on your father's station would protect his rig when you are transmitting as long as you stay off of 80M.  

You could also add 1/4 wave stubs to trap out undesired signals as well.  
audiosystemsgroup.com/Coax-Stubs.pdf

Earl 
N8SS


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Message: 4
Date: Tue, 22 Apr 2014 11:38:58 -0400
From: "Gary Smith" <Gary at ka1j.com>
To: towertalk at contesting.com
Subject: [TowerTalk] Filter for one band
Message-ID: <53568D12.25528.13D23116 at Gary.ka1j.com>
Content-Type: text/plain; charset=US-ASCII

Just got the word from the repair facility that proximity to another 
transmitter was the likely cause of my father's Icom receiving front 
end damage. That would have to have been from me transmitting on 
another band when he was on. My tribander is 20 feet from his 80M inv 
V

I have a coax relay on his rig that disconnects the antenna when his 
rig is turned off and when he is on I avoid 80M which is the only 
band he uses so I never transmit on 80 when he is on. I've heard of 
but never seen or used filters that are supposed to be good for 
isolating one band in a multi op contesting situation. Any 
suggestions of what filter I might could use on his coax to keep 
other frequencies from being an issue to him on 80 again? 

Thanks,

Gary
KA1J

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