X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 15 Jun 2011 00:06:28 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ew0-f52.google.com ([209.85.215.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5020779 for lml@lancaironline.net; Wed, 15 Jun 2011 00:01:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.52; envelope-from=hackmo15@gmail.com Received: by ewy28 with SMTP id 28so8039ewy.25 for ; Tue, 14 Jun 2011 21:00:57 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=iYNIWvmnRVAOY8qFeV3MmykxIMqV3NW0CTASUdmBFsIDbHNeQ+9ZlQah2020URtrJ7 us4jt5oMpokutCu51lPWrW63oJd/KtvwMVHxUug/rwYB/QzOIBoR0CnLMwEkhllVJ003 /6PzVZDKnRx+Kz5488hlNnlOovQXdr/x+74Co= MIME-Version: 1.0 Received: by 10.213.103.72 with SMTP id j8mr869938ebo.137.1308110457446; Tue, 14 Jun 2011 21:00:57 -0700 (PDT) Received: by 10.213.22.5 with HTTP; Tue, 14 Jun 2011 21:00:57 -0700 (PDT) X-Original-Date: Tue, 14 Jun 2011 21:00:57 -0700 X-Original-Message-ID: Subject: LNC4 ELT Antenna From: jon hadlich X-Original-To: lml@lancaironline.net, cscheid@charter.net Content-Type: multipart/alternative; boundary=00504502ca3024a17104a5b833e8 --00504502ca3024a17104a5b833e8 Content-Type: text/plain; charset=ISO-8859-1 I'm not an antenna expert, but I have installed a few that work. A couple VERY general rules I use for antenna ground planes. A transmitting antenna needs a ground plane. Com, xpnder, elt, etc-yes. GPS-no. The ground plane radial should be the same length as the antenna . Since this is impossible in our aircraft, as large as possible is a fair compromise. 2 ft square works ok for the CI 122 com antenna. The elt antenna works ok with a smaller ground plane. In the IV's an aluminum plate spanning the empennage under the fiberglass portion works well for a small antenna farm, including the elt and gps. -- Jon Hadlich AI Systems (541) 815-7381 --00504502ca3024a17104a5b833e8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I'm not an antenna expert, but I have installed a few that work.
A c= ouple VERY general rules I use for antenna ground planes.
A transmitting= antenna needs a ground plane. Com, xpnder, elt, etc-yes. GPS-no.
The gr= ound plane radial should be the same length as the antenna . Since this is = impossible in our aircraft, as large as possible is a fair compromise. 2 ft= square works ok for the CI 122 com antenna.
The elt antenna works ok with a smaller ground plane. In the IV's an al= uminum plate spanning the empennage under the fiberglass portion works wel= l for a small antenna farm, including the elt and gps.
--
Jon Hadlich
AI Systems
(541) 815-7381
--00504502ca3024a17104a5b833e8--