There is always the customary practice of laying out radials.

One of these days I've got ot get a better setup than a 10m dipole in the 
attic. 

Blair 

----------------------------------
Subject: Re: NTC: GEC BRT 400S 
From: Upton, Shawn 
Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Upton, Shawn 
Date: Tue, 1 Mar 2011 07:38:35 -0500 
Content-Type: text/plain 

I've had decent luck with simple counterpoises.  They are almost like making a 
dipole, in that the wire is about the nominal quarter wavelength.  Usually on 
the rig itself, attached to its ground lug, used with a long wire for an 
antenna.  [Although if I have an unbalanced antenna (like a vertical, or an 
inverted L) I have used them to keep RF off the transmitter, if I don't have a 
good earth connection.]

I'd think for the ham bands a counterpoise for 80m and 40m would work well 
(20m and 10m of wire, give or take), and might work well enough for all 
bands.  Length isn't critical, just run wires away from each other.  And they 
can be used inconjunction with any other grounding (earthing) scheme.

Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336


 

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