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Re: Topband: Field Day Stubs

Subject: Re: Topband: Field Day Stubs
From: Missouri Guy <>
Date: Wed, 16 Apr 2008 01:57:55 +0000
List-post: <">>
> Instructions for building a switchable "Field Day" stub that reduces 
> interference between stations on 40/20/15/10 are on the Hands-On 
> Radio Web 
> site -  Download 
> Experiment #22 on "Stubs".  At the 80/75-meter station, attach a 
> 1/4-wave 
> shorted stub as that will act as a short on 40, 20, 15, and 10 with 
> varying 
> degrees of attenuation on the higher bands.  I think this was 
> originally 
> suggested to me by K6LL or N2IC.

Way back in the annuls of QST there was an article the "BOA - A
Constrictor for Unwanted Radiation" (something like that).  It
explained the use of coax stubs as filters.

Charlie, N0TT
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