X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ironclad.mail.utexas.edu ([128.83.32.59] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1231210 for flyrotary@lancaironline.net; Mon, 10 Jul 2006 14:25:11 -0400 Received-SPF: none receiver=logan.com; client-ip=128.83.32.59; envelope-from=mark.steitle@austin.utexas.edu DomainKey-Signature: s=main; d=austin.utexas.edu; c=nofws; q=dns; b=6STTaFQ5LIFzsOTt3ns2IgswR+YDIIP9F5LayRu56LnvQZsJtxfZ6J0ky3QCtyPoH4Pd0ThNBDUoZbrenmQYAROWXzDFX/TAnasMHq6UzbaphQbXkWGFH6gVvht+qXdIEkYUZw4SmpZltLLI2rw8qnlFwTvDGkl4O8MjvQzh0yY=; Received: from exb01.austin.utexas.edu (HELO MAIL01.austin.utexas.edu) ([129.116.87.142]) by ironclad.mail.utexas.edu with ESMTP; 10 Jul 2006 13:24:27 -0500 x-mimeole: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C6A44E.13BC7347" Subject: RE: [FlyRotary] Re: Dreded EM2 mandatory update Date: Mon, 10 Jul 2006 13:24:27 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E0508F39A@MAIL01.austin.utexas.edu> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Dreded EM2 mandatory update Thread-Index: Acah1gqpq4CfR2w2Slm5SlD6J4fLfgCd3EUg From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C6A44E.13BC7347 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Tracy,=20 Can you possibly post a picture? Since I haven't detected any noise in my system, I would hate to pull the box out and send it half-way across the U.S. to fix a non-problem. If we could check our own units, maybe you won't have such a large pile of UPS boxes piled up at your doorstep. I'm just trying to save you some work. ;-) =20 =20 Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Friday, July 07, 2006 9:59 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Dreded EM2 mandatory update =20 To All single part EM2 users:=20 =20 I just identified a problem which causes radio noise in some installations. =20 There was a high frequency bypass capacitor left off the single piece version of EM2. There should be a .33 uF 50vdc part (low series inductance type, not electrolytic) from the +12v input line to ground near the switching regulator chip. Don't know why I don't hear that much radio noise on the bench and in some completed installations but the noise on the +12 volt line is obvious.=20 =20 Sorry for the inconvenience but send the unit back and I'll fix it. No charge of course. =20 Tracy Crook, RWS ------_=_NextPart_001_01C6A44E.13BC7347 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Tracy,

Can you possibly post a = picture?  Since I haven’t detected any noise in my system, I would hate to pull the = box out and send it half-way across the U.S. to fix a non-problem.  If we could check our own units, maybe you = won’t have such a large pile of UPS boxes piled up at your doorstep.  = I’m just trying to save you some work.  ;-)  =

 

Mark = S.

 

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Friday, July 07, = 2006 9:59 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Dreded EM2 mandatory update

 

To All single part EM2 users: 

 

I just identified a = problem which causes radio noise in some installations.

 

There was a high = frequency bypass capacitor left off the single piece version of EM2.  There should = be a .33 uF 50vdc part (low series inductance type, not electrolytic) from the +12v  input line to ground near the switching regulator chip.  = Don't know why I don't hear that much radio noise on the bench and in some completed installations but the noise on the +12 volt line is obvious. 

 

Sorry for the = inconvenience but send the unit back and I'll fix it.  No charge of = course.

 

Tracy Crook,   = RWS

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