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 [65.54.250.83] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.1c.1) with ESMTP id 1210578 for flyrotary@lancaironline.net; Wed, 28 Jun 2006 17:03:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.83; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 28 Jun 2006 14:02:37 -0700 Message-ID: Received: from 4.171.150.115 by BAY115-DAV11.phx.gbl with DAV; Wed, 28 Jun 2006 21:02:37 +0000 X-Originating-IP: [4.171.150.115] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Radio noise Date: Wed, 28 Jun 2006 17:02:32 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C8_01C69AD4.A58021E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 Seal-Send-Time: Wed, 28 Jun 2006 17:02:32 -0400 X-MimeOLE: Produced By MSN MimeOLE V9.20.0026.0800 X-OriginalArrivalTime: 28 Jun 2006 21:02:37.0602 (UTC) FILETIME=[2F7D7020:01C69AF6] This is a multi-part message in MIME format. ------=_NextPart_000_00C8_01C69AD4.A58021E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Bill, will be very interested in your results. Have had a couple of = other builders mention noise but I have not had any radio noise in my = installation and a hand held turned up none (here) on the problem units = from field. If the wire positioning can make that much difference , = that might explain it. I'll do some more testing here to see if I can = nail this down. Might have something to do with un-terminated inputs as = well since my test bench setup has all inputs wired. Tracy ----- Original Message -----=20 From: Bill Schertz=20 To: Rotary motors in aircraft=20 Sent: Saturday, June 24, 2006 6:58 PM Subject: [FlyRotary] Re: Radio noise After hooking up resistors or sensors to all outputs, I still had the = noise.=20 I then wired in a 100microfarad capacitor on the inlet line between = +12 and=20 GND, and no noticable effect. Further mucking around found that repositioning the wires coming out = of the=20 back of the EM-2 by about 1/2 inch eliminated the noise! Will see if = this=20 'solution' holds up with further tests on Monday. Thanks for all the suggestions. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: "Bill Schertz" = > To: "Rotary motors in aircraft" = > Sent: Friday, June 23, 2006 11:12 PM Subject: [FlyRotary] Re: Radio noise > Ed, that is a worthwhile suggestion. I am going to pick up some = resistors=20 > tomorrow. I note that the sensors are 10 to 180 ohms for temp and=20 > pressure, was there a reason for the suggestion of 20K? > > Thanks. > Bill Schertz > KIS Cruiser # 4045 > ----- Original Message -----=20 > 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=20 >> generating the nose because some of the pins (tied to the sensors) = are=20 >> not a complete circuit. Might try just hooking up some 20K ohm = resistors=20 >> between your sensor leads and ground just to see. Either that or = perhaps=20 >> getting feed back from the chip on your power lines suggesting a = low=20 >> value .01uf capacitor. >> >> Ed >> ----- Original Message -----=20 >> 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=20 >>>equipment before putting the top on my plane which will make it = much=20 >>>harder to get access. >>> >>> I have an SL-30 NAV/COM and SL-40 COM. The COM works, but when I = turn on=20 >>> the EM-2 I get a bunch of hash (white noise). Any suggestions on=20 >>> 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/=20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_00C8_01C69AD4.A58021E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Bill, will be very interested in your results.  Have had a = couple=20 of other builders mention noise but I have not had any radio noise in my = installation and a hand held turned up none (here) on the problem = units=20 from field.  If the wire positioning can make that much difference = , that=20 might explain it.  I'll do some more testing here to see if I can = nail this=20 down.  Might have something to do with un-terminated inputs as well = since=20 my test bench setup has all inputs wired.
 
Tracy
----- Original Message -----
From: Bill=20 Schertz
To: Rotary motors in = aircraft
Sent: Saturday, June 24, 2006 = 6:58=20 PM
Subject: [FlyRotary] Re: Radio=20 noise

After hooking up resistors or sensors to all outputs, I = still=20 had the noise.
I then wired in a 100microfarad capacitor on the = inlet line=20 between +12 and
GND, and no noticable effect.

Further = mucking=20 around found that repositioning the wires coming out of the
back = of the=20 EM-2 by about 1/2 inch eliminated the noise! Will see if this =
'solution'=20 holds up with further tests on Monday.

Thanks for all the=20 suggestions.
Bill Schertz
KIS Cruiser # 4045
----- Original = Message=20 -----
From: "Bill Schertz" <wschertz@comcast.net>
To: = "Rotary=20 motors in aircraft" <flyrotary@lancaironline.net>
Sent:=20 Friday, June 23, 2006 11:12 PM
Subject: [FlyRotary] Re: Radio=20 noise


> Ed, that is a worthwhile suggestion. I am going = to pick=20 up some resistors
> tomorrow. I note that the sensors are 10 to = 180=20 ohms for temp and
> pressure, was there a reason for the = suggestion of=20 20K?
>
> Thanks.
> Bill Schertz
> KIS Cruiser = #=20 4045
> ----- Original Message -----
> From: "Ed Anderson" = <eanderson@carolina.rr.com&g= t;
>=20 To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>=20 Sent: Friday, June 23, 2006 9:07 PM
> Subject: [FlyRotary] Re: = Radio=20 noise
>
>
>> Just a WAG, Bill.  Could it be = the=20 oscillator of the microchip in the EM2
>> generating the = nose=20 because some of the pins (tied to the sensors) are
>> not a = complete=20 circuit. Might try just hooking up some 20K ohm resistors
>> = between=20 your sensor leads and ground just to see.  Either that or perhaps =
>> getting feed back from the chip on your power lines = suggesting a=20 low
>> value .01uf capacitor.
>>
>> = Ed
>>=20 ----- Original Message -----
>> From: "Bill Schertz" <wschertz@comcast.net>
>= >=20 To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>>=20 Sent: Friday, June 23, 2006 6:42 PM
>> Subject: [FlyRotary] = Radio=20 noise
>>
>>
>>>I am in the process of = wiring up=20 and testing each piece of electronic
>>>equipment before = putting=20 the top on my plane which will make it much
>>>harder to = get=20 access.
>>>
>>> I have an SL-30 NAV/COM and = SL-40 COM.=20 The COM works, but when I turn on
>>> the EM-2 I get a = bunch of=20 hash (white noise).  Any suggestions on
>>> = diagonstics? The=20 EM-2 is not connected to 'all' sensors = yet.
>>>
>>>=20 Bill Schertz
>>> KIS Cruiser #=20 4045
>>>
>>> --
>>> = Homepage:  http://www.flyrotary.com/
>&= gt;>=20 Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>>>
>>
>>=
>>
>>=20 --
>> Homepage:  http://www.flyrotary.com/
>&= gt;=20 Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>
>
>=20 --
> Homepage:  http://www.flyrotary.com/
> = Archive=20 and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/=20


--
Homepage:  http://www.flyrotary.com/
Archi= ve and=20 UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
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