X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 03 Jan 2012 17:10:56 -0500 Message-ID: X-Original-Return-Path: Received: from nm26-vm0.bullet.mail.bf1.yahoo.com ([98.139.213.74] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with SMTP id 5335910 for lml@lancaironline.net; Tue, 03 Jan 2012 16:09:53 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.213.74; envelope-from=mattinlosangeles@yahoo.com Received: from [98.139.212.145] by nm26.bullet.mail.bf1.yahoo.com with NNFMP; 03 Jan 2012 21:09:17 -0000 Received: from [98.139.212.195] by tm2.bullet.mail.bf1.yahoo.com with NNFMP; 03 Jan 2012 21:09:17 -0000 Received: from [127.0.0.1] by omp1004.mail.bf1.yahoo.com with NNFMP; 03 Jan 2012 21:09:17 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 399569.99212.bm@omp1004.mail.bf1.yahoo.com Received: (qmail 55435 invoked by uid 60001); 3 Jan 2012 21:09:17 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=mwqf9O290BVIeFo5pj/kQS6SO/LksngGhOXbQ8TfZMQrW34JzJrnKHchx2YPJGadIc+EWWhSlc04/78a+mK3X4aPJWZXIlusSCUz/I0AvSK3OUmMADqaY7+qYaGf83dZnq9c80uyd7BESOLmEM/gyUGjHUIJWrfMoDrnciH35eQ=; X-YMail-OSG: FdeR6sgVM1mr5dcYUXGCFWoIePvhMIcI5rhhYoA0KTq4gN6 2hgwKj5ApmNcKFKMIo9xRHWaUjXCYPBQOfneYylECwFMRcwijQjxQ1IUvm9A TPI6xTJUz_.G91PC34Xz5syThcU11IL0J_yxQ3kL0d9YzGd0yGHpdS8RftMN NMtJpbwnDC2fkH6xFBPR.VJR.2gM7gI3_aIjA3rxGn6RbsoQDEr4BCVKU6zQ uLh25vvUyHsT6qNF8Bdym5aug1ivGSdrmscyLFKqSJJw6WuAN.rKiNTo5A5J bad2e7KpHYCDX_.49QqnwWY3cUqfd9_bIXMYpAARgIwZzRNEf7deLw6kKIN4 d_BloEKbqzdNm08_B0C6DPvdTdodW1qShzEqa4trw85EXC1HlnFkqk4FUi3z gFT2ArqPPFjFMCgnsvepq3m2C7BP7_3U85mYDVbfoi5V5_EkspiMUbdUCbkh 8khPbLIQJeQLVHHAqo6KYzGL3FCgFcNxbevqTffypqxY8d.pHy0_tZ641O7p NzimY4PDrpJZ.8FFNcy3YNfSCkX6bPOrS5URf1VeNhwUCdMIeVAj0xsEKYkR dRoc9fRu5i839ZkFE0PWuU.6fegiZjgcQ6I_wcKjz8L4xdoTi8wXzcdHZvGN GnLoUUbRDWs.8sbrHWrEm9J1LpPtnAPxF.mh2BvOe.WXcWq7U_kzmJe_kZof Ffr_M2SthJHzJjsnfmQFxCVxd7MNxiDd7vqr7aJP_kFwqQfKK5veBoRquI5b 473vjqqApo7leh1cbrUP..N7u_Fp7CS5yzU4- Received: from [63.110.89.212] by web160902.mail.bf1.yahoo.com via HTTP; Tue, 03 Jan 2012 13:09:17 PST X-Mailer: YahooMailWebService/0.8.115.331698 References: X-Original-Message-ID: <1325624957.69915.YahooMailNeo@web160902.mail.bf1.yahoo.com> X-Original-Date: Tue, 3 Jan 2012 13:09:17 -0800 (PST) From: Matt losangeles Reply-To: Matt losangeles Subject: Re: [LML] Nav/Com Antennas X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="498176207-124291713-1325624957=:69915" --498176207-124291713-1325624957=:69915 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi Jack,=0A=A0=0AI 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 lik= e I will need to get one of the Bob Archer VOR antenna's. It doesn't look l= ike there is an actual Bob Archer Com antenna that will fit. What did you u= se specifically in your wingtip? I remember reading some time back that a c= om and vor antenna are very close in size so I am guessing I could use them= interchangeably. Not sure.=0A=A0=0AIf anyone else has any experience with = this I would also appreciate their input.=0A=A0=0AMatt=0A=0A=0A____________= ____________________=0AFrom: Jack Morgan =0ATo: lm= l@lancaironline.net =0ASent: Tuesday, January 3, 2012 12:03 PM=0ASubject: [= LML] Nav/Com Antennas=0A=0A=0ADean: =0A=0AI used Bob Archer antennas on my = IV P with excellent results. The vertical tail unit is COM 1. I placed the = wingtip version in each tip. The right tip (also containing the magnetic he= ading sensor) feeds the G900 nav/gs 4 way splitter recommended by Garmin wh= ile the left tip is the COM 2 antenna. Tuning a distant ATIS shows both com= antennas have the same sensitivity. You may hear that com antennas should = be vertically polarized which is correct in theory. In actual practice the = scatter experienced by both the XMIT and received signals makes the polariz= ation effect negligible.=0A=0AI also placed the GPS/XM antennas below the e= glass turtledeck. The xpdr antenna is the only external antenna which is on= the bottom using the carbon fiber as a ground plane with excellent results= .=0A=0AJack Morgan=0A=0A=0AOn Jan 3, 2012, at 6:00 AM, Lancair Mailing List= wrote:=0A=0AI was looking for some advice about communication antennas. = =A0The legacy is setup to have one com antenna. =A0We want a capable IFR ai= rplane and I am hesitant to have one antenna with a diplexer (or is it dupl= exer, I've seen it both ways) as a possible single point of failure. =A0Is = this the method that most people are using? =A0If you mounted a 2nd com ant= enna, where did you place it? =A0I searched the archives and found someone = else who asked the same question but I couldn't find the answer. =A0Any oth= er input or advice on the subject would be appreciated.=0A>=0A>Dean Whiting= =0A> --498176207-124291713-1325624957=:69915 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Jack,
 
I am wanting to inst= all 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 A= rcher 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 re= member 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 a= ny experience with this I would also appreciate their input.
 
Matt

From:= Jack Morgan <jmorgan1023@comcast.net>
To: lml@lancaironline.net
Sent: Tuesday, January 3, 2012 12:03 P= M
Subject: [LML] Nav/Com= Antennas

Dean:

I used Bob Archer antennas on my IV P with excellent results. The vert= ical tail unit is COM 1. I placed the wingtip version in each tip. The righ= t tip (also containing the magnetic heading sensor) feeds the G900 nav/gs 4= way splitter recommended by Garmin while the left tip is the COM 2 antenna= . Tuning a distant ATIS shows both com antennas have the same sensitivity. = You may hear that com antennas should be vertically polarized which is corr= ect in theory. In actual practice the scatter experienced by both the XMIT = and received signals makes the polarization effect negligible.

I also placed the GPS/XM antennas below the eglass turtledeck. The xpd= r antenna is the only external antenna which is on the bottom using the car= bon fiber as a ground plane with excellent results.

Jack Morgan

On Jan 3, 2012, at 6:00 AM, Lancair Mailing List wrote:

I was looking for some advice= about communication antennas.  The legacy is setup to have one com an= tenna.  We want a capable IFR airplane and I am hesitant to have one a= ntenna with a diplexer (or is it duplexer, I've seen it both ways) as a pos= sible single point of failure.  Is this the method that most people ar= e using?  If you mounted a 2nd com antenna, where did you place it? &n= bsp;I searched the archives and found someone else who asked the same quest= ion but I couldn't find the answer.  Any other input or advice on the = subject would be appreciated.

Dean Whiting



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