X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 24 Feb 2011 11:08:45 -0500 Message-ID: X-Original-Return-Path: Received: from mta11.charter.net ([216.33.127.80] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4879984 for lml@lancaironline.net; Wed, 23 Feb 2011 10:39:17 -0500 Received-SPF: pass receiver=logan.com; client-ip=216.33.127.80; envelope-from=troneill@charter.net Received: from imp10 ([10.20.200.15]) by mta11.charter.net (InterMail vM.7.09.02.04 201-2219-117-106-20090629) with ESMTP id <20110223153841.QRGD6966.mta11.charter.net@imp10> for ; Wed, 23 Feb 2011 10:38:41 -0500 Received: from [192.168.1.100] ([75.132.241.174]) by imp10 with smtp.charter.net id BTef1g00c3mUFT705TegJL; Wed, 23 Feb 2011 10:38:40 -0500 X-Authority-Analysis: v=1.0 c=1 a=1680rUiM9pkA:10 a=seElNvaXEAk96yV2_U8A:9 a=utmGMICyG-r5Nluf0zkA:7 a=rDyXN5K2Wrfp1Frl4k2i2zr9ZEIA:4 a=CjuIK1q_8ugA:10 a=yqTEKUnyldCJgNjBa2IA:7 a=i_oewzZZA1PokyhrLdLn-c8MqYMA:4 From: Terrence O'Neill Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-153-193256251 Subject: Re: [LML] Antenna type and placement X-Original-Date: Wed, 23 Feb 2011 09:38:39 -0600 In-Reply-To: X-Original-To: Lancair Mailing List References: X-Original-Message-Id: <9014F103-9FEC-412E-9C1E-526BB48E3276@charter.net> X-Mailer: Apple Mail (2.1082) --Apple-Mail-153-193256251 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Tom, Yes. Being electgronica;;y challenged I had a dreadful time with and my = new KX125, using the embedded Lancari antennae, installed by the = original builder about 20 years ago. in the vertical and horizontal = tail.. The enclosed antennae results were nil or weak, persistently. Then I = tried mounting an external type whip but mounted inside, vertically, = behind the hydraulic pump bulkhead; poor for straight ahead stations or = airports. Finally bit the bullet and mounted an AVT-14 (bent whip) = through a hole in the bottom of the fuselage, with the antenna base = inside, resting on a reflecting plate of aluminum foil just spray-glued = of the inside skin. Only the whip sticks down. No more com problems. For the omni, I stuck a Advanced Aircraft Electronics bipole flexible = ribbon antenna up against the fuselage top skin right behind the = canolpy; no ground plane needed. Seems to work okay for nav, but didn't = for com. Terrence L235/320 N211AL On Feb 23, 2011, at 8:09 AM, TOM GARDINER wrote: > Folks > =20 > I am experiencing a dreadful time getting my COM radios to perform to = their full (or even half) potential in my LNC2. I have two Bob Archer's = mounted in the tailcone and in the proper orientation with a VSWR of = around 1.5 with RG 400 cable. The antennas are fed by two Garmin 430s = with a measured output of 8 watts each. The thing is that ATC and my = flying friends report a consistently weak signal and the same applies on = reception on my end. My airplane has the carbon tail and I built the = seat bench using carbon on foam (bad idea in hindsight). I have tried = another type of antenna that is a dipole with a balun mounted in the = center of the baggage section in a vertical orientation but with little = or no improvement in results. > =20 > =20 > I am beginning to suspect the Lancair supplied Gray epoxy primer which = I understand contains aluminum oxide in the base > =20 > I am now considering mounting an external antenna but thought I would = ask if anybody had experienced similar issues and subsequently corrected = them. Any help/advice would be very much appreciated > =20 > Thanks > =20 > Tom > =20 > LNC2 > 24 hrs >=20 >=20 --Apple-Mail-153-193256251 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Tom,
Yes.  Being electgronica;;y = challenged I had a dreadful time with and my new KX125, using the = embedded Lancari antennae, installed by the original builder about 20 = years ago. in the vertical and horizontal tail..
The enclosed = antennae results were nil or  weak, persistently.  Then I = tried mounting an external type whip but mounted inside, vertically, = behind the hydraulic pump bulkhead; poor for straight ahead stations or = airports.  Finally bit the bullet and mounted an AVT-14 (bent whip) = through a hole in the bottom of the fuselage, with the antenna base = inside, resting on a reflecting plate of aluminum foil just spray-glued = of the inside skin.  Only the whip sticks down.
No more = com problems.
For the omni, I stuck a Advanced Aircraft = Electronics bipole flexible ribbon antenna up against the fuselage top = skin right behind the canolpy; no ground plane needed.  Seems to = work okay for nav, but didn't for = com.

Terrence
L235/320 = N211AL

On Feb 23, 2011, at 8:09 AM, TOM GARDINER = wrote:

Folks
 
I am = experiencing a dreadful time getting my COM radios to perform to their = full (or even half) potential in my LNC2.  I have two Bob Archer's = mounted in the tailcone and in the proper orientation with a VSWR of = around 1.5 with RG 400 cable.  The antennas are fed by two Garmin = 430s with a measured output of 8 watts each.  The thing is = that ATC and my flying friends report a consistently weak signal and the = same applies on reception on my end.  My airplane has the = carbon tail and I built the seat bench using carbon on foam (bad idea in = hindsight).  I have tried another type of antenna that is = a dipole with a balun mounted in the  center of the baggage section = in a vertical orientation but with little or no improvement in = results.
 
 
I am = beginning to suspect the Lancair supplied Gray epoxy primer which I = understand contains aluminum oxide in the base
 
I am now considering mounting an external antenna = but thought I would ask if anybody had experienced similar issues and = subsequently corrected them.  Any help/advice would be very much = appreciated
 
Thanks
Tom
LNC2
24 hrs



= --Apple-Mail-153-193256251--