X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop: No license found, only first 5 messages were scanned Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1c.1) with ESMTP id 1204650 for flyrotary@lancaironline.net; Sat, 24 Jun 2006 08:06:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id k5OC62tZ008049 for ; Sat, 24 Jun 2006 08:06:04 -0400 (EDT) Message-ID: <000b01c69786$9584d480$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Radio noise Date: Sat, 24 Jun 2006 08:06:11 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine Ok, Bill, if your sensor impedance is in that range then I would suggest a lower value such as 200-500 ohms. The reason, I erred on the side of 20K is I KNOW that would provide plenty of impedance to prevent damaging a microchip that can happen if a chips pin is inadvertently grounded and in effect "shorts" that pin causing excess current to flow. But, anything close to your sensor impedance would work just fine. Ed ----- Original Message ----- From: "Bill Schertz" To: "Rotary motors in aircraft" Sent: Saturday, June 24, 2006 12:12 AM Subject: [FlyRotary] Re: Radio noise > Ed, that is a worthwhile suggestion. I am going to pick up some resistors > tomorrow. I note that the sensors are 10 to 180 ohms for temp and > pressure, was there a reason for the suggestion of 20K? > > Thanks. > Bill Schertz > KIS Cruiser # 4045 > ----- Original Message ----- > From: "Ed Anderson" > To: "Rotary motors in aircraft" > Sent: Friday, June 23, 2006 9:07 PM > Subject: [FlyRotary] Re: Radio noise > > >> Just a WAG, Bill. Could it be the oscillator of the microchip in the EM2 >> generating the nose because some of the pins (tied to the sensors) are >> not a complete circuit. Might try just hooking up some 20K ohm resistors >> between your sensor leads and ground just to see. Either that or perhaps >> getting feed back from the chip on your power lines suggesting a low >> value .01uf capacitor. >> >> Ed >> ----- Original Message ----- >> From: "Bill Schertz" >> To: "Rotary motors in aircraft" >> Sent: Friday, June 23, 2006 6:42 PM >> Subject: [FlyRotary] Radio noise >> >> >>>I am in the process of wiring up and testing each piece of electronic >>>equipment before putting the top on my plane which will make it much >>>harder to get access. >>> >>> I have an SL-30 NAV/COM and SL-40 COM. The COM works, but when I turn on >>> the EM-2 I get a bunch of hash (white noise). Any suggestions on >>> diagonstics? The EM-2 is not connected to 'all' sensors yet. >>> >>> Bill Schertz >>> KIS Cruiser # 4045 >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >>> >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >