Message: 1
Date: Mon, 16 Oct 2006 11:41:34 -0500
From: Mike Gorniak <mgorniak@genesiswireless.us>
Subject: [TenTec] Coaxial Ground
To: tentec@contesting.com
Message-ID: <4533B63E.50209@genesiswireless.us>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Gary,
Probably the easiest explanation is to call it a "shielded ground wire". The
coax inner conductor is the actual ground wire, and the shield keeps it from radiating.
My 2nd floor installation was a nightmare, given that I was also very close to the
antenna center, which was about 10 feet above the roof of my house. This was one
technique I used to beat the "RF in the Audio" problem. I also used toroids and
bypass capacitors in generous quantities.
OF course, each RFI condition is unique in some way...YMMV.
73,
Mike
NM7X
------------------------------
Message: 2
Date: Mon, 16 Oct 2006 11:51:21 -0400
From: "Gary Hoffman" <ghoffman@spacetech.com>
Subject: Re: [TenTec] TenTec Digest, Vol 46, Issue 45
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Message-ID: <00f401c6f13a$f04ca5b0$9ee7254a@aa2iz>
Content-Type: text/plain; charset="iso-8859-1"
Mike,
I'm curious. What is the theory behind this approach ? I'm always
interested to learn more approaches to grounding.
Gary
----- Original Message -----
From: "Mike Gorniak" <mgorniak@genesiswireless.us>
To: <tentec@contesting.com>
Sent: Monday, October 16, 2006 11:39 AM
Subject: Re: [TenTec] TenTec Digest, Vol 46, Issue 45
Hi John,
If you are going to run that wire down to a ground rod, you might try
using coax instead. Attach the center conductor Only at the rig end, and
connect Both the shield And the center conductor at the ground rod end.
Another variation is to connect the center conductor Only at both the
rig and ground rod ends, and then use a .1 or .01 mfd. capacitor to
connect between the shield and the Center conductor at the ground rod
end, or both ends.
When I had my ham shack on the second floor, this configuration worked
for me.
Good Luck, and please let us know of your progress!
73,
Mike
NM7X