X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from bay0-omc1-s35.bay0.hotmail.com ([65.54.246.107] verified) by logan.com (CommuniGate Pro SMTP 5.1c.1) with ESMTP id 1212420 for flyrotary@lancaironline.net; Thu, 29 Jun 2006 15:58:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.107; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.78]) by bay0-omc1-s35.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 29 Jun 2006 12:57:24 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 29 Jun 2006 12:57:24 -0700 Message-ID: Received: from 4.171.147.238 by BAY115-DAV6.phx.gbl with DAV; Thu, 29 Jun 2006 19:57:20 +0000 X-Originating-IP: [4.171.147.238] 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: Thu, 29 Jun 2006 15:57:14 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0107_01C69B94.B0CF0460" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 Seal-Send-Time: Thu, 29 Jun 2006 15:57:15 -0400 X-OriginalArrivalTime: 29 Jun 2006 19:57:24.0729 (UTC) FILETIME=[3DA62690:01C69BB6] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0107_01C69B94.B0CF0460 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable OK Bill, that adds up with yesterday's tests that I ran.=20 With the Icom radio about 18" from the test bench EM2 I found no noise = (that is how I tested in the past). I started moving the antenna closer = & closer until I was able to pick up hash (white) noise when several = inches away. Thought there might be a problem but then I found that I = could get as much or more noise when I brought the antenna close to ANY = of the computerized equipment in the room (digital O-scope, freq. = counter, PC, monitor, intrusion alarm system, etc. At this point I = think it is a matter of proper cable routing. Tracy ----- Original Message -----=20 From: Bill Schertz=20 To: Rotary motors in aircraft=20 Sent: Wednesday, June 28, 2006 6:18 PM Subject: [FlyRotary] Re: Radio noise It appears to be the fix, i.e. repositioning the wires. My stack, = working from the bottom up is Transponder, SL-40, SL-30, PMA-6000 audio = panel, and EM-2. The harness from the EM-2 was going across the top of = the audio panel, and raising the wires about an inch or so seems to have = eliminated the problem. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Wednesday, June 28, 2006 4:02 PM Subject: [FlyRotary] Re: Radio noise 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_0107_01C69B94.B0CF0460 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
OK Bill, that adds up with yesterday's tests that I = ran. 
 
 With the Icom radio about 18" from the test bench EM2 I found = no=20 noise (that is how I tested in the past).  I started moving the = antenna=20 closer & closer until I was able to pick up hash (white)  noise = when=20 several inches away.  Thought there might be a problem but then I = found=20 that I could get as much or more noise when I brought the antenna = close to=20 ANY of the computerized equipment in the room (digital = O-scope, freq.=20 counter, PC, monitor, intrusion alarm system, etc.    At = this=20 point I think it is a matter of proper cable routing.
 
Tracy
----- Original Message -----
From: Bill=20 Schertz
To: Rotary motors in = aircraft
Sent: Wednesday, June 28, 2006 = 6:18=20 PM
Subject: [FlyRotary] Re: Radio=20 noise

It appears to be the fix, i.e. repositioning = the wires.=20 My stack, working from the bottom up is Transponder, SL-40, SL-30, = PMA-6000=20 audio panel, and EM-2.  The harness from the EM-2 was going = across the=20 top of the audio panel, and raising the wires about an inch or so = seems to=20 have eliminated the problem.
 
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Tracy Crook=20
To: Rotary motors in = aircraft=20
Sent: Wednesday, June 28, = 2006 4:02=20 PM
Subject: [FlyRotary] Re: = Radio=20 noise

Hi Bill, will be very interested in your results.  Have = had a=20 couple of other builders mention noise but I have not had any radio = noise in=20 my installation and a hand held turned up none (here) on the = problem=20 units from field.  If the wire positioning can make that much=20 difference , that might explain it.  I'll do some more testing = here to=20 see if I can nail this down.  Might have something to do with=20 un-terminated inputs as well since my test bench setup has all = inputs=20 wired.
 
Tracy
----- Original Message ----- =
From: Bill=20 Schertz
To: Rotary motors in = aircraft=20
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=20 still had the noise.
I then wired in a 100microfarad capacitor = on the=20 inlet line between +12 and
GND, and no noticable=20 effect.

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

Thanks for all the suggestions.
Bill = Schertz
KIS=20 Cruiser # 4045
----- Original Message -----
From: "Bill = Schertz"=20 <wschertz@comcast.net>
To: = "Rotary 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=20 pick up some resistors
> tomorrow. I note that the sensors = are 10=20 to 180 ohms for temp and
> pressure, was there a reason for = the=20 suggestion of 20K?
>
> Thanks.
> Bill = Schertz
>=20 KIS Cruiser # 4045
> ----- Original Message -----
> = From: "Ed=20 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=20 complete circuit. Might try just hooking up some 20K ohm resistors =
>> between your sensor leads and ground just to = see. =20 Either that or perhaps
>> getting feed back from the = chip on=20 your power lines suggesting a low
>> value .01uf=20 capacitor.
>>
>> Ed
>> ----- Original = Message=20 -----
>> 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=20 up and testing each piece of electronic
>>>equipment = before=20 putting the top on my plane which will make it much =
>>>harder=20 to get access.
>>>
>>> I have an SL-30 = NAV/COM and=20 SL-40 COM. The COM works, but when I turn on
>>> the = EM-2 I=20 get a bunch of hash (white noise).  Any suggestions on=20
>>> diagonstics? The EM-2 is not connected to 'all' = sensors=20 yet.
>>>
>>> Bill Schertz
>>> = KIS=20 Cruiser # 4045
>>>
>>> --
>>>=20 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 and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/=20


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