Ray, many thanks for your comments. I have already found that touching the
mike makes a difference, although that may just be the symptom of a more
serious grounding problem at this end. Radioworks
http://radioworks.com/nbgnd.html has an illuminating discussion of ground
problems, and my next step is to drill another hole through the window sill
and run a wire down a story and a half to a ground rod. In addition I will
try a counterpoise consisting of a 1/4 wavelength (at 40 meters) piece of
hookup wire strung down the hall to determine its affect on my problem. W2DU
choke filters between the Matchbox and amplifier and between the amplifier
and Orion appear to have helped lessen the problem.
John, N9JG
------------------------------
Message: 11
Date: Sat, 14 Oct 2006 09:55:40 -0400
From: "Mary Ann Higgins" <mahiggins@gmail.com>
Subject: Re: [TenTec] N9JG--Orion and RF Feedback
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Message-ID:
<1c32114a0610140655t2560fcdfs9b69ca7273edb205@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi - One thing that made a nite & day difference to me
was using a mike with a metal case; Heil HM-10,TT 708.
My antennas are very close ( 25ft) and using the TT 706
was a disaster when using the ALS-600. Hope this helps.
Ray / W1JUS
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