X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Sun, 08 Oct 2006 17:56:40 -0400 Message-ID: X-Original-Return-Path: Received: from sccrmhc14.comcast.net ([204.127.200.84] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTP id 1448881 for lml@lancaironline.net; Sun, 08 Oct 2006 01:03:23 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.200.84; envelope-from=colwells@comcast.net Received: from office (c-24-7-138-224.hsd1.ca.comcast.net[24.7.138.224]) by comcast.net (sccrmhc14) with SMTP id <2006100805030201400qotpve>; Sun, 8 Oct 2006 05:03:02 +0000 From: "Steve/Claudette Colwell" X-Original-To: "'Lancair Mailing List'" Subject: ELT Antenna location X-Original-Date: Sat, 7 Oct 2006 22:02:53 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C6EA5C.5711C130" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Thread-Index: Acbqiznv0O7PApMATsuRlpHEi8jSZAACsaLQ X-Original-Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C6EA5C.5711C130 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Thought this would be of interest so I am forwarding it to LML. Steve Colwell Legacy Bob, I bought a Artex ME406 ELT http://www.artex.net/me406.html that transmits on both 121.5 and 406. My project is a carbon fiber Lancair Legacy. I don't want to hang another antenna on the outside of the airframe and this airplane is all carbon fiber. Can I place the supplied antenna http://www.artex.net/documents/110-773.pdf diagonally (21.5" exposed length) across the rear window without too much loss of signal? Any alternative ideas? Thanks, Steve Colwell From: Steve/Claudette Colwell To: bobsantennas@earthlink.net Sent: Saturday, October 07, 2006 3:02 PM Subject: ELT Antenna Hi Colwells; Unlike most ELT antennas this one looks like it has some science incorporated. Most ELT antennas are very poor. This one is surely meant to be installed externally on a metal aircraft. I would guess that the cylindrical object a bit above the conical base is a choke that keeps the 406 mhz from continuing out the antenna. That antenna should work ok if you install it in the window as you suggest. Make a bracket to accept the antenna base at one corner of the window, making sure it is grounded to the graphite and bond it in some way across the window. It would be best to try to keep it as far away from the graphite frame as possible. It is not necessary to have the antenna vertical because the satellites looking down like to see horizontal polarization anyway. Hope this helps. Too bad Lancair didn't incorporate more fiberglass windows so you wouldn't have so many external antennas. They do cause quite abit of drag. Regards Bob ------=_NextPart_000_0007_01C6EA5C.5711C130 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
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Thought this would be of interest so I am forwarding = it to LML. 

 

Steve Colwell  Legacy =

 

 

Bob,

 

I bought a Artex ME406 ELT http://www.artex.net/me406.html<= /a> that transmits on both 121.5 and 406.  My project is a carbon fiber = Lancair Legacy.  I don’t want to hang another antenna on the outside = of the airframe and this airplane is all carbon fiber.  Can I place the = supplied antenna http://www.artex.net/= documents/110-773.pdf diagonally (21.5” exposed length) across the rear window without = too much loss of signal?  Any alternative = ideas?

 

Thanks,

Steve Colwell

 

 

From: Steve/Claudette Colwell

Sent: = Saturday, October 07, 2006 3:02 PM

Subject: ELT = Antenna

 

Hi Colwells;

 

Unlike most ELT antennas this one looks like it has some science incorporated. Most ELT antennas are very poor. This one is surely meant = to be installed externally on a metal aircraft. I would guess that the = cylindrical object a bit above the conical base is a choke that keeps the = 406 mhz from continuing out the antenna. That antenna should work ok if you = install it in the window as you suggest. Make a bracket to accept the antenna base = at one corner of the window, making sure it is grounded to the graphite and = bond it in some way across the window. It would be best to try to keep it as far = away from the graphite frame as possible. It is not necessary to have the antenna vertical because the satellites looking down like to see horizontal polarization anyway.

Hope this helps. Too bad Lancair didn't incorporate more = fiberglass windows so you wouldn't have so many external antennas. They do cause = quite abit of drag.

 

Regards

 

Bob

 

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