X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 04 Jan 2012 16:38:21 -0500 Message-ID: X-Original-Return-Path: Received: from mail-gx0-f180.google.com ([209.85.161.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTPS id 5337162 for lml@lancaironline.net; Wed, 04 Jan 2012 11:37:47 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.180; envelope-from=hackmo15@gmail.com Received: by ggnq1 with SMTP id q1so9977896ggn.25 for ; Wed, 04 Jan 2012 08:37:13 -0800 (PST) MIME-Version: 1.0 Received: by 10.50.10.225 with SMTP id l1mr15192501igb.9.1325695033779; Wed, 04 Jan 2012 08:37:13 -0800 (PST) Received: by 10.231.81.2 with HTTP; Wed, 4 Jan 2012 08:37:13 -0800 (PST) Received: by 10.231.81.2 with HTTP; Wed, 4 Jan 2012 08:37:13 -0800 (PST) X-Original-Date: Wed, 4 Jan 2012 08:37:13 -0800 X-Original-Message-ID: Subject: Antenna ground plane From: jon hadlich X-Original-To: "lml@lancaironline.net" Content-Type: multipart/alternative; boundary=14dae9340e7391a54704b5b66d6d --14dae9340e7391a54704b5b66d6d Content-Type: text/plain; charset=ISO-8859-1 Just to clarjfy, a ground plane for a com antenna, like the comant CI 122, should be installed horizontally with some kind of conductive material. Copper paint, aluminum sheet, mesh. It doesn't care. I've used Reynolds wrap in an emergency and it worked. The optimal size is the radius of the ground plane should be the length of the antenna. The is usually unreasonable in our aircraft, so as big as possible. Square or circle. Inside or outside as long as there's continuity between the ground plane and the base of the antenna. Also, once the ground plane starts up the side of the airplane, it is not effective, so don't bother with the sides trying to get the optimal size. --14dae9340e7391a54704b5b66d6d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Just to clarjfy, a ground plane for a com antenna, like the comant CI 12= 2, should be installed horizontally with some kind of conductive material. = Copper paint, aluminum sheet, mesh. It doesn't care. I've used Reyn= olds wrap in an emergency and it worked. The optimal size is the radius of = the ground plane should be the length of the antenna. The is usually unreas= onable in our aircraft, so as big as possible. Square or circle. Inside or = outside as long as there's continuity between the ground plane and the = base of the antenna. Also, once the ground plane starts up the side of the = airplane, it is not effective, so don't bother with the sides trying to= get the optimal size.

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