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Aero LED'S

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sam.marlow

Joined: 25 Feb 2006
Posts: 99

Posted: Sat Oct 01, 2011 6:21 am Post subject: Aero LED'S

I have 2 friends that have installed the new Aero Led Nav and strobes, 

and both have noise in the headset at all times, even with the strobes 

turned off. Has anyone else experienced this? I'm trying to trouble 

shoot this, and don't have a clue.

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 01, 2011 9:46 am Post subject: Aero LED'S

At 09:17 AM 10/1/2011, you wrote:

 	  Quote: 	
		  

<sam.marlow(at)roadrunner.com>



I have 2 friends that have installed the new Aero Led Nav and 

strobes, and both have noise in the headset at all times, even with 

the strobes turned off. Has anyone else experienced this? I'm trying 

to trouble shoot this, and don't have a clue.


	


   Are these products qualified for type certificated

   aircraft . . . i.e. are there STC's for installation

   on factory machines?

        Bob . . .

                    ////

                   (o o)

    ===========o00o=(_)=o00o=========

    < Go ahead, make my day . . .   >

    < show me where I'm wrong.      >

    =================================

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 01, 2011 11:07 am Post subject: Aero LED'S

At 09:17 AM 10/1/2011, you wrote:

 	  Quote: 	
		  

<sam.marlow(at)roadrunner.com>



I have 2 friends that have installed the new Aero Led Nav and 

strobes, and both have noise in the headset at all times, even with 

the strobes turned off. Has anyone else experienced this? I'm trying 

to trouble shoot this, and don't have a clue.


	


   Do I presume correctly that the noise happens with the

   position lights on, strobes off but the noise disappears

   with the position lights off?

        Bob . . .

                    ////

                   (o o)

    ===========o00o=(_)=o00o=========

    < Go ahead, make my day . . .   >

    < show me where I'm wrong.      >

    =================================

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sam.marlow

Joined: 25 Feb 2006
Posts: 99

Posted: Sun Oct 02, 2011 8:07 am Post subject: Aero LED'S

Robert L. Nuckolls, III wrote:

 	  Quote: 	
		   

 <nuckolls.bob(at)aeroelectric.com>



 At 09:17 AM 10/1/2011, you wrote:

> 

> <sam.marlow(at)roadrunner.com>

>

> I have 2 friends that have installed the new Aero Led Nav and 

> strobes, and both have noise in the headset at all times, even with 

> the strobes turned off. Has anyone else experienced this? I'm trying 

> to trouble shoot this, and don't have a clue.



   Do I presume correctly that the noise happens with the

   position lights on, strobes off but the noise disappears

   with the position lights off?

        Bob . . .

                    ////

                   (o o)

    ===========o00o=(_)=o00o=========

 < Go ahead, make my day . . . >

 < show me where I'm wrong. >

    =================================



No, it's all the time, but worse with the strobes on. And no this is not 
	


an STC'ed or TSO'ed product.

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tiethoff

Joined: 02 Sep 2008
Posts: 23

Posted: Sun Oct 02, 2011 9:58 am Post subject: Aero LED'S

The green and the red led's are driven by a switched power supply. This gives a hum in the system. The only solution is to build a filter (choke and condensator) at the 12v input of the led's.

 

2011/10/2 Sam Marlow <sam.marlow(at)roadrunner.com (sam.marlow(at)roadrunner.com)>

 	  Quote: 	
		   --> AeroElectric-List message posted by: Sam Marlow <sam.marlow(at)roadrunner.com (sam.marlow(at)roadrunner.com)>

 

 Robert L. Nuckolls, III wrote:

  	  Quote: 	
		   --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

 

 At 09:17 AM 10/1/2011, you wrote:

  	  Quote: 	
		   --> AeroElectric-List message posted by: Sam Marlow <sam.marlow(at)roadrunner.com (sam.marlow(at)roadrunner.com)>

 

 I have 2 friends that have installed the new Aero Led Nav and strobes, and both have noise in the headset at all times, even with the strobes turned off. Has anyone else experienced this? I'm trying to trouble shoot this, and don't have a clue.

  	
 

   Do I presume correctly that the noise happens with the

   position lights on, strobes off but the noise disappears

   with the position lights off?

 

 

        Bob . . .

                    ////

                   (o o)

    ===========o00o=(_)=o00o=========

 < Go ahead, make my day . . . >

 < show me where I'm wrong. >

    =================================

 

 

 

 

 

 

 

 	
 No, it's all the time, but worse with the strobes on. And no this is not an STC'ed or TSO'ed product.

 

 ====================================

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 	




-- 

Met vriendelijke groet,

Eric Tiethoff

mail: eric(at)tiethoff.nl (eric(at)tiethoff.nl)

web: http://tiethoff.nl

   [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Oct 02, 2011 10:03 am Post subject: Aero LED'S

At 12:56 PM 10/2/2011, you wrote:

  	  Quote: 	
		   The green and the red led's are driven by a switched power supply. This gives a hum in the system. The only solution is to build a filter (choke and condensator) at the 12v input of the led's. 	


    Do you have access to a proven 'recipe for success'

    as to the size and placement of the components?



 

        Bob . . .

                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

    =================================



     [quote][b]

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tiethoff

Joined: 02 Sep 2008
Posts: 23

Posted: Sun Oct 02, 2011 10:40 am Post subject: Aero LED'S

The problem is that you have to use long powerlines from the main switch to the wingtips. So in the wingtips are the "transmitters" (the switched power supply's to make the led's working). These long powerlines act as an antenna and dirty-up your system. In order to surpress this transmission you have to block it with a choke (i guess 20-30 turns of 22awg wire and a condensator of 10 micro farad). See drawing...good luck.

 

2011/10/2 Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

 	  Quote: 	
		     At 12:56 PM 10/2/2011, you wrote:

  	  Quote: 	
		   The green and the red led's are driven by a switched power supply. This gives a hum in the system. The only solution is to build a filter (choke and condensator) at the 12v input of the led's. 	




    Do you have access to a proven 'recipe for success'

    as to the size and placement of the components?



 

        Bob . . .

                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

    =================================



     

 	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




	




-- 

Met vriendelijke groet,

Eric Tiethoff

mail: eric(at)tiethoff.nl (eric(at)tiethoff.nl)

 web: http://tiethoff.nl

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Oct 02, 2011 6:23 pm Post subject: Aero LED'S

At 01:37 PM 10/2/2011, you wrote:

  	  Quote: 	
		   The problem is that you have to use long powerlines from the main switch to the wingtips. So in the wingtips are the "transmitters" (the switched power supply's to make the led's working). These long powerlines act as an antenna and dirty-up your system. In order to surpress this transmission you have to block it with a choke (i guess 20-30 turns of 22awg wire and a condensator of 10 micro farad). See drawing...good luck. 	


    Electrolytic capacitors are almost never a part

    of a solution for reducing attenuation at radio

    frequencies. The value of inductance for what

    I presume is an air-wound, helix of wire is only

    useful as an attenuator at radio frequencies.



    I'm not suggesting that this approach did not

    work for somebody . . . they were on the right

    track for a practical filter. But without knowing

    the spectrum of energy for the offending noise,

    this filter was far from optimal to the task.



    In the instance where a filter was added to the

    Buck Pucks . . . see



  http://www.aeroelectric.com/Catalog/AEC/9051/9051-700A.pdf



    the components were selected to attenuate radio

    frequency noise reported by disappointed users

    of the Buck Pucks. A hand-held transceiver held

    close to an operating LED driven by a Buck Puck

    was bombarded by a substantial noise sorce.



    The capacitors used in this case are rather small

    as is the inductor. The inductor was not selected

    for it's ability to function as a high quality

    resonance but as a lossy impedance. It was desirable

    that any VHF+ RF appearing across the terminals

    was converted to heat!



    It seems likely that the AeroLED study will

    produce a similar finding. But until that

    finding is verified, moving forward with any

    filter experiments could be a poor use of time

    or offer a risk of less than optimal performance.



    Bob . . .    [quote][b]

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berkut13(at)berkut13.com
Guest

Posted: Sun Oct 02, 2011 7:27 pm Post subject: Aero LED'S

Yes.  I have a composite aircraft and installed the units using an old 

wiring diagram that came in the box - I too had lots of noise in the 

headsets and radio reception.



There is a NEW wiring diagram on the website that the tech guys at AeroLEDs 

pointed out...sure enough, the radio transmitted noise went away.  Problem 

one solved.



However, (after LOTS of hunting) the rest of the line transmitted noise was 

being picked up somewhere in the XM audio output of the Garmin 396 GPS that 

was being fed into the intercom.  This even happened with the GPS on battery 

power...it was very weird.



I tried power filters on all ends (LED end, GPS, and intercom) - no luck. 

the only thing that fixed the problem was upgrading to the Garmin 496.  It 

seems that the audio output grounding is different on the 496 and is not 

susceptible to the noise, or floating ground issue, or whatever that real 

problem was.



Noise free and loving it...and the LEDs.



Hope that helps!



-James

Berkut/Race13

www.berkut13.com

--

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