X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 22 Jun 2009 22:52:31 -0400 Message-ID: X-Original-Return-Path: Received: from mta31.charter.net ([216.33.127.82] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3691042 for lml@lancaironline.net; Mon, 22 Jun 2009 11:22:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.33.127.82; envelope-from=troneill@charter.net Received: from imp10 ([10.20.200.10]) by mta31.charter.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20090622152208.YGWP2647.mta31.charter.net@imp10> for ; Mon, 22 Jun 2009 11:22:08 -0400 Received: from axs ([75.132.241.174]) by imp10 with smtp.charter.net id 73N71c00E3mUFT7053N77b; Mon, 22 Jun 2009 11:22:08 -0400 X-Original-Message-ID: <05141F4BE632468F9F91D9301837F07B@axs> From: "terrence o'neill" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: interference? X-Original-Date: Mon, 22 Jun 2009 10:22:09 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C9F323.4CE4FC90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-PCToolsMIME: Updated by PC Tools Mime Parser 1.0.0.4 This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C9F323.4CE4FC90 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Tom, The comm coax is probably old RG58 ... OD is .187=22. It runs right under = (about 4 inches) the AHRS, and is no closer than about 3 ft. to the = magnetometer, which is on the other side of the fuselage. I bought the project (kit =2311) with the antennae coax leads already in = it. I could probably splice the RG58's front part into RG400... can't = reach very far back into the tailcone. =20 (This design was not refined for easy maintenance.) I'll check to see if the two coax run close together anywhere. And will check to see if I used shielded wire to the magnetometer and AHRS. All seems to work fine until I transmit. Many thanks. =20 Terrence O'Neill ----- Original Message -----=20 From: Tom Gourley=20 To: lml=40lancaironline.net=20 Sent: Monday, June 22, 2009 09:58 Subject: =5BLML=5D Re: interference? Terrence, I would keep the comm coax as far from the magnetometer as possible. In = addition make sure you're using quality coax, RG400 or better. Don't use = RG58. I would also use shielded wire to run power and gnd to the = magnetometer and ARHS. The nav coax shouldn't be a problem, it's only = function is to carry very small signals from the antenna, but if it's = running close to the comm coax I suppose the two could be coupling, in = which case having the nav coax close to the magnetometer might be an issue. Tom Gourley E-mail message checked by Internet Security (6.0.1.441) Database version: 6.12650 http://www.pctools.com/internet-security/ E-mail message checked by Internet Security (6.0.1.441) Database version: 6.12650 http://www.pctools.com/en/internet-security/ ------=_NextPart_000_0014_01C9F323.4CE4FC90 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable <=21DOCTYPE HTML PUBLIC =22-//W3C//DTD HTML 4.0 Transitional//EN=22>
Tom,
 
The comm = coax is=20 probably old RG58 ... OD is .187=22.  It runs right under (about 4 = inches)=20 the AHRS, and is no closer than about 3 ft. to the magnetometer, = which is=20 on the other side of the fuselage.
I bought the = project (kit =2311)=20 with the antennae  coax leads already in it.  I could probably = splice=20 the RG58's front part into RG400... can't reach very far back into the=20 tailcone. 
(This design was = not refined=20 for easy maintenance.)
I'll check to see = if the two=20 coax run close together anywhere.
And will check to = see if I used=20 shielded wire to the magnetometer and AHRS.
All seems to work = fine until I=20 transmit.
Many = thanks. =20
Terrence = O'Neill
----- Original Message -----
From:=20 Tom=20 Gourley
Sent: Monday, June 22, 2009 = 09:58
Subject: =5BLML=5D Re: = interference?

Terrence,
 
I would keep the comm coax as far from = the=20 magnetometer as possible.  In addition make sure you're using = quality=20 coax, RG400 or better.  Don't use RG58.  I would also use = shielded=20 wire to run power and gnd to the magnetometer and ARHS.  The nav = coax=20 shouldn't be a problem, it's only function is to carry very small = signals=20 from the antenna, but if it's running close to the comm coax I suppose = the two=20 could be coupling, in which case having the nav coax close to the=20 magnetometer might be an issue.
 
Tom Gourley
 
 




E-mail message checked by Internet = Security=20 (6.0.1.441)
Database version: 6.12650
http://www.pctool= s.com/internet-security/




E-mail message = checked by Internet Security (6.0.1.441)
Database version: = 6.12650
http://www.pctool= s.com/internet-security/
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