|
|
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 -----
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.
I then wired in a 100microfarad capacitor on the inlet line
between +12 and
GND, and no noticable effect.
Further mucking
around found that repositioning the wires coming out of the
back of the
EM-2 by about 1/2 inch eliminated the noise! Will see if this
'solution'
holds up with further tests on Monday.
Thanks for all the
suggestions.
Bill Schertz
KIS Cruiser # 4045
----- Original Message
-----
From: "Bill Schertz" <wschertz@comcast.net>
To: "Rotary
motors in aircraft" <flyrotary@lancaironline.net>
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
> 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" <eanderson@carolina.rr.com>
>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>
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" <wschertz@comcast.net>
>>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>>
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/
--
Homepage: http://www.flyrotary.com/
Archive and
UnSub: http://mail.lancaironline.net/lists/flyrotary/
|
|