X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from irongate.mail.utexas.edu ([128.83.32.55] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1233652 for flyrotary@lancaironline.net; Wed, 12 Jul 2006 08:50:47 -0400 Received-SPF: none receiver=logan.com; client-ip=128.83.32.55; envelope-from=mark.steitle@austin.utexas.edu DomainKey-Signature: s=main; d=austin.utexas.edu; c=nofws; q=dns; b=ObW1Qp/0hQmxsLFkHiRGF52iUc5U40qbpHLCihXALsYmIavT8+OLKxqnPaW0fPytgVwy9huigoek9uxKZsUcI3gLcUrcuKxuv/a71mOwOW9edMiHoOes1WvHJPTZneTh5IST6qfCQKPIWsn6dmwBUoOs4oQO+BHpWIf1ytYPoq4=; Received: from exb02.austin.utexas.edu (HELO MAIL01.austin.utexas.edu) ([129.116.87.143]) by irongate.mail.utexas.edu with ESMTP; 12 Jul 2006 07:50:01 -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_01C6A5B1.B0B7964F" Subject: RE: [FlyRotary] Re: Dreded EM2 mandatory update Date: Wed, 12 Jul 2006 07:50:01 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E0512AA55@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: AcalOW+B3+o6qafKR6qJPBVDsh/fWgAd/IIQ From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C6A5B1.B0B7964F Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable OK, I'm a little slow, but now I get it. Since I have an "earlier unit", I don't need to pull it and send it back. Thanks for the explanation. =20 Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Tuesday, July 11, 2006 3:52 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Dreded EM2 mandatory update =20 Appreciate the thought Mark, but when I say "left off" I mean as in never there. It got left off in the schematic transfer to the board maker. It isn't there on any of the single piece units. The update does not apply to the earlier two part units. =20 I could send you a picture of nothing at all though : ) =20 Tracy Crook ----- Original Message -----=20 From: Mark R Steitle =20 To: Rotary motors in aircraft =20 Sent: Monday, July 10, 2006 2:24 PM Subject: [FlyRotary] Re: Dreded EM2 mandatory update =20 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 =09 ________________________________ 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_01C6A5B1.B0B7964F Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

OK, I’m a little slow, but = now I get it.  Since I have an “earlier unit”, I don’t need = to pull it and send it back.  Thanks for the = explanation.

 

Mark = S.

 

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Tuesday, July 11, = 2006 3:52 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Dreded EM2 mandatory update

 

Appreciate the thought = Mark, but when I say "left off"  I mean as in never there.  It = got left off in the schematic transfer to the board maker.  It isn't = there on any of the single piece units.  The update does not apply to the = earlier two part units.

 

I could send you a = picture of nothing at all though : )

 

Tracy = Crook

----- Original Message ----- =

From: Mark R Steitle =

Sent: Monday, July 10, 2006 2:24 PM

Subject: [FlyRotary] Re: Dreded EM2 mandatory update

 

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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