Topband: Field Day Stubs

[Missouri Guy]

> 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 - http://www.arrl.org/tis/info/HTML/Hands-On-Radio/.  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.

73,
Charlie, N0TT