X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3899268 for flyrotary@lancaironline.net; Mon, 26 Oct 2009 00:46:38 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20091026044602.KSZW11920.fed1rmmtao103.cox.net@fed1rmimpo02.cox.net> for ; Mon, 26 Oct 2009 00:46:02 -0400 Received: from BigAl ([72.192.133.78]) by fed1rmimpo02.cox.net with bizsmtp id xGm11c00H1hf1Cg04Gm12i; Mon, 26 Oct 2009 00:46:02 -0400 X-VR-Score: -30.00 X-Authority-Analysis: v=1.0 c=1 a=zDnY56y_TbvYzs4_PygA:9 a=04rHO0K0rDETC-kioNEA:7 a=Ais70Ow_ZsOUH2k68uFnKaCI1NIA:4 a=pFXsuwkX1A6trsRPNzAA:9 a=rHrxdJfF2rOqjXVxfSYA:7 a=-iw4NLahcYcuor4cAi05eXBQchoA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RF interference Date: Sun, 25 Oct 2009 21:46:59 -0800 Message-ID: <9F07426FCD624831BE55DC5F93A37D23@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01CA55BC.AE3C9920" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: AcpVdIM/ZugrA3fvSxCBgIVuCkW/bgAifJUg In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0013_01CA55BC.AE3C9920 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Any chance it's an SL30? My SL30 wired to a Bob Archer wing tip antenna would almost kill the engine when transmitting. My 430 wired to a belly antenna worked fine I was told by a Garmin rep that the issue is potential 'bleed' to different frequency - which is only a potential problem for ATC - nothing to do with any RF noise in your airplane. I had a similar problem early on with effects on the EC2 by my COM 2. It was RF being picked up via the OAT probe; but I also was having poor transmission from the com. Found a poor connection in the antenna lead was causing the problem. Usually having a lot of RF interference from the radios is due to bad connection or poor impedence match in the antenna causing lots of 'leakage'. Al ------=_NextPart_000_0013_01CA55BC.AE3C9920 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

Any chance it's an SL30?  My SL30 wired to a Bob Archer wing tip = antenna would almost kill the engine when transmitting. My 430 wired to a belly = antenna worked fine

 

I was told by a Garmin rep that = the issue is potential ‘bleed’ to different frequency – = which is only a potential problem for ATC – nothing to do with any RF noise = in your airplane.

 

I had a similar problem early on = with effects on the EC2 by my COM 2.  It was RF being picked up via the = OAT probe; but I = also was having poor transmission from the com.  Found a poor connection in = the antenna lead was causing the problem.  Usually having a lot of RF = interference from the radios is due to bad connection or poor impedence match in the = antenna causing lots of ‘leakage’.

 

Al 

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