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 qmta09.westchester.pa.mail.comcast.net ([76.96.62.96] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTP id 5336579 for lml@lancaironline.net; Wed, 04 Jan 2012 06:44:30 -0500 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.96; envelope-from=jmorgan1023@comcast.net Received: from omta21.westchester.pa.mail.comcast.net ([76.96.62.72]) by qmta09.westchester.pa.mail.comcast.net with comcast id HPaN1i0081ZXKqc59Pjwnm; Wed, 04 Jan 2012 11:43:56 +0000 Received: from [192.168.1.100] ([24.11.157.176]) by omta21.westchester.pa.mail.comcast.net with comcast id HPjv1i01G3odyL83hPjwCx; Wed, 04 Jan 2012 11:43:56 +0000 From: Jack Morgan Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-31--522116369 Subject: Nav/Com antennas X-Original-Date: Wed, 4 Jan 2012 06:43:54 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <657752BB-9AD8-4EA8-8362-FC9ECC28F17E@comcast.net> X-Mailer: Apple Mail (2.1084) --Apple-Mail-31--522116369 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Matt: I just used the Nav antenna with no modification. Theoretically you = should shorten it to be optimum for the slightly higher Com frequency = range but the gain realized is not worth the effort. By leaving it alone = you have the option to use it as a Nav antenna in a later configuration = where maximum sensitivity is more important. To really optimize the = antenna for Com you would need to slightly change the tap point as well = as the coupling capacitance associated with the tap. In real practice = the noise level of the audio at the fringes of reception are not = significantly different between the Com1 and Nav antennas to warrant = retuning the Nav antenna. Jack > Hi Jack, > =20 > I am wanting to install an antenna in the left wingtip on my Legacy = for Com2. I am wondering if you could recommend one. It looks like I = will need to get one of the Bob Archer VOR antenna's. It doesn't look = like there is an actual Bob Archer Com antenna that will fit. What did = you use specifically in your wingtip? I remember reading some time back = that a com and vor antenna are very close in size so I am guessing I = could use them interchangeably. Not sure. > =20 > If anyone else has any experience with this I would also appreciate = their input. > =20 > Matt >=20 >=20 --Apple-Mail-31--522116369 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Matt:

I just used the Nav antenna with no = modification. Theoretically you should shorten it to be optimum for the = slightly higher Com frequency range but the gain realized is not worth = the effort. By leaving it alone you have the option to use it as a Nav = antenna in a later configuration where maximum sensitivity is more = important. To really optimize the antenna for Com you would need to = slightly change the tap point as well as the coupling capacitance = associated with the tap. In real practice the noise level of the audio = at the fringes of reception are not significantly different between the = Com1 and Nav antennas to warrant retuning the Nav = antenna.

Jack

Hi = Jack,

I am wanting to install an antenna in the left = wingtip on my Legacy for Com2. I am wondering if you could recommend = one. It looks like I will need to get one of the Bob Archer VOR = antenna's. It doesn't look like there is an actual Bob Archer Com = antenna that will fit. What did you use specifically in your wingtip? I = remember reading some time back that a com and vor antenna are very = close in size so I am guessing I could use them interchangeably. Not = sure.

If anyone else has any experience with this I = would also appreciate their input.
Matt

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