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[TowerTalk] More stubs and filters

To: "Tower and HF antenna construction topics." <>
Subject: [TowerTalk] More stubs and filters
From: Chris Wendling <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Wed, 31 Mar 2010 06:39:55 -0700 (PDT)
List-post: <">>
Suppose I'm at Field Day, operating CW on 40m.Right next to me, a station is 
operating on 20m.I could use a stub to attenuate him. I could use a lumped 
element filterin my transmission line pre-tuned to null (attenuate) him.But 
here's another idea, and I'd like some feedback.Say a had an extra antenna 
tuner and a dummy load.Could I tee the extra tuner into my coax, and tune it to 
the offending frequency(in this case 20m), and dump it into the dummy load? 
Would this not actlike a versatile "tunable" trap, with fairly high 
attenuation?Any guesses on possible attenuation?Thanks in advance for all your 

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