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Shielded Strobe Light Query

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tonyrenshaw268(at)gmail.c
Guest

Posted: Wed Jul 30, 2014 8:10 pm Post subject: Shielded Strobe Light Query

Gidday,

I am using AveoflashLP Ultra Aurora Nav/Strobe lights, that have their flasher units within the lights. There is 4 cables coming from each strobe, and to get quad core shielded is very hard, and expensive. The suppliers don’t mention in their installation documentation that you need shielded wiring, and yet when pushed, they do. I am wondering if I just shield the positive cable, or whether I need to also shield the negative/earth, and the “phase wire” which goes to each strobe to keep them synchronised. I’d be interested on what anyone thinks, and in fact whether shielding them all together could introduce a specific problem rather than just having one or two of the wires shielded. 

Regards

Tony Renshaw

Sydney Aussie

richard collings

Joined: 08 Jul 2011
Posts: 73
Location: warwickshire england

Posted: Thu Jul 31, 2014 1:28 am Post subject: Shielded Strobe Light Query

Hi Tony

Just a thought, but if your position lights are LED, ie. very low current 

load, then you could use radio mic cable which you will have to get anyway 

to wire in your jack plugs.

Changing the subject, I am coming down to Sydney in January next year and 

would like to meet you and look at your Europa, perhaps we could arrange 

something nearer the time.

Regards

Richard



--

davidjoyce(at)doctors.org
Guest

Posted: Thu Jul 31, 2014 3:51 am Post subject: Shielded Strobe Light Query

Tony, Not clever enough to give you a definitive answer, 

but strongly suspect you should have all wires in a single 

sheath. You can incidentally buy nice cable sheath in 

various diameters which you can apply easily 

retrospectively over a bundle of wires. Can't remember 

where I got mine from now, but I found them by googling 

wire sheathing or something similar.

Regards, David Joyce, G-XSDJ

On Thu, 31 Jul 2014 10:27:43 +0100

  "Richard Collings" <rcollings(at)talktalk.net> wrote:

[quote] 

<rcollings(at)talktalk.net>

 

 Hi Tony

 Just a thought, but if your position lights are LED, ie. 

very low current load, then you could use radio mic cable 

which you will have to get anyway to wire in your jack 

plugs.

 Changing the subject, I am coming down to Sydney in 

January next year and would like to meet you and look at 

your Europa, perhaps we could arrange something nearer 

the time.

 Regards

 Richard

 

 --

tonyrenshaw268(at)gmail.c
Guest

Posted: Thu Jul 31, 2014 4:28 am Post subject: Shielded Strobe Light Query

Hi David, 

Thanks for that advice. I didn't know about after market shielding, nor the single shielding. I suppose it makes sense, otherwise why have multi core with single shielding. Amazing how a little cross pollenisation of ideas can create positive synergy. Appreciated.

Regards

Tony Renshaw

P.S. Quad Core shielded is bloody expensive. Oh well, only have to buy it once. (That's my wife excuse).

Sent from my iPad

[quote] On 31 Jul 2014, at 9:50 pm, "David Joyce" <davidjoyce(at)doctors.org.uk> wrote:

 Tony, Not clever enough to give you a definitive answer, but strongly suspect you should have all wires in a single sheath. You can incidentally buy nice cable sheath in various diameters which you can apply easily retrospectively over a bundle of wires. Can't remember where I got mine from now, but I found them by googling wire sheathing or something similar.

 Regards, David Joyce, G-XSDJ

 On Thu, 31 Jul 2014 10:27:43 +0100

 "Richard Collings" <rcollings(at)talktalk.net> wrote:

> 

> Hi Tony

> Just a thought, but if your position lights are LED, ie. very low current load, then you could use radio mic cable which you will have to get anyway to wire in your jack plugs.

> Changing the subject, I am coming down to Sydney in January next year and would like to meet you and look at your Europa, perhaps we could arrange something nearer the time.

> Regards

> Richard

> --

grahamsingleton(at)btinte
Guest

Posted: Thu Jul 31, 2014 4:28 am Post subject: Shielded Strobe Light Query

Tony & David    

My guess is that because you want to keep RF (caused by square waves in the strobe),

you should sheath the signal wires only.

Fergus Kyle would know, maybe Bud does too

Graham





        From: David Joyce <davidjoyce(at)doctors.org.uk>

 To: europa-list(at)matronics.com 

 Sent: Thursday, 31 July 2014, 12:50

 Subject: Re:  Shielded Strobe Light Query

  

 

--> Europa-List message posted by: "David Joyce" <davidjoyce(at)doctors.org.uk (davidjoyce(at)doctors.org.uk)>



Tony, Not clever enough to give you a definitive answer, but strongly suspect you should have all wires in a single sheath. You can incidentally buy nice cable sheath in various diameters which you can apply easily retrospectively over a bundle of wires. Can't remember where I got mine from now, but I found them by googling wire sheathing or something similar.

Regards, David Joyce, G-XSDJ

On Thu, 31 Jul 2014 10:27:43 +0100

 "Richard Collings" <rcollings(at)talktalk.net (rcollings(at)talktalk.net)> wrote:

[quote] --> Europa-List message posted by: "Richard Collings" <rcollings(at)talktalk.net (rcollings(at)talktalk.net)>

 

 Hi Tony

 Just a thought, but if your position lights are LED, ie. very low current load, then you could use radio mic cable which you will have to get anyway to wire in your jack plugs.

 Changing the subject, I am coming down to Sydney in January next year and would like to meet you and look at your Europa, perhaps we could arrange something nearer the time.

 Regards

 Richard

 

 --

h&jeuropa

Joined: 07 Nov 2006
Posts: 635

Posted: Thu Jul 31, 2014 6:19 am Post subject: Re: Shielded Strobe Light Query

Tony,



Here is a link to AeroLED install instructions for a similar light which incorporates position light and strobe.  Just follow the AeroLED instructions.  You will only need 3 conductor shielded wire.  Be sure you connect the shield, ground wire and a physical connection to the LED assembly all together at the wingtip.



http://www.aeroleds.com/wp-content/uploads/2013/05/Pulsar-Installation-Experimental.pdf



We are using AeroLED and have no problem with noise or interference.



Jim & Heather

pestar

Joined: 11 Apr 2007
Posts: 61
Location: Auckland, New Zealand

Posted: Thu Jul 31, 2014 2:32 pm Post subject: Re: Shielded Strobe Light Query

Tony



You can get the necessary cabling from EDMO who are aviation distributors based out of Melbourne.  I installed AeroLeds in my MCR-4S as they required the same type of 4 +1 shielded cabling.  At that time EDMO had an office at Ardmore in New Zealand (walking distance from my hangar) so I sourced it from them at cost significantly less than paying retail from any of the "Golden Solder" companies.



Cheers Peter

_________________
Peter Armstrong
Auckland, New Zealand
DynAero MCR-4S (Do not shoot me Smile

tonyrenshaw268(at)gmail.c
Guest

Posted: Thu Jul 31, 2014 2:48 pm Post subject: Shielded Strobe Light Query

Hi Peter, 

Thanks for that, and I'll call them soon. What's a "Golden Solder" company?

Regards

Tony R



Sent from my iPad



 	  Quote: 	
		   On 1 Aug 2014, at 8:32 am, "pestar" <peter(at)reivernet.com> wrote:

 

 

 

 Tony

 

 You can get the necessary cabling from EDMO who are aviation distributors based out of Melbourne.  I installed AeroLeds in my MCR-4S as they required the same type of 4 +1 shielded cabling.  At that time EDMO had an office at Ardmore in New Zealand (walking distance from my hangar) so I sourced it from them at cost significantly less than paying retail from any of the "Golden Solder" companies.

 

 Cheers Peter

 

 --------

 Peter Armstrong

 Auckland, New Zealand

 DynAero MCR-4S (Do not shoot me  ).

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=427650#427650

budyerly(at)msn.com
Guest

Posted: Thu Jul 31, 2014 2:55 pm Post subject: Shielded Strobe Light Query

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Tony,

 Originally Aveo USA dealers mentioned that just a simple 18 gauge wire  unshielded was enough for a simple strobe, nav, steady flashing unit  needed.  However, whenever you have a pulsing electrical device noise is a  real concern.  I would prefer to use a shielded wire on the strobe side of  the wire.  I'm sure you have downloaded as much as you can on the  installation, but do look at some complaints about other strobe type led  operations on emergency vehicles etc and radio interference. 

  

 We try to do our due diligence but I prefer to be on the cautious  side.  Here is a comment from http://www.emcrules.com/2011/07/radio-interference-from-led-lighting.html 

 they are engineers in the lighting industry.

  

 I quote:

 However, although today’s LEDs are capable of long life, and delivering  high light output levels with very little power consumption, most need to be  paired with a drive circuit to provide constant current sourcing to operate in  our homes and offices, and that’s where the problem comes in. These switching  drive circuits operate at increasingly higher frequencies, and in order to  maintain the highest efficiency, and highest LED longevity possible, they also  need to maintain very high slew rates. These factors contribute to the overall  unwanted emissions from each individual lighting element, increasing the  Electromagnetic background noise. End quote.

  

 This noise is in the VHF range so I have probably overcautiously decided to  install shielded wire.  The Aveo circuitry is in the light itself and a  long way away from your radio gear, but noise is unwanted in a system.   Even the flap motor, so twisted pairs at a minimum should be used.  See the  guys on the wiring installation attached.  I talked to them.  I tested  the lights near my handheld radio and they are clean until a foot or so away,  and when paired together in sync make a slight pulsed hiss.  Now if you run  the blue wire to put the strobes in sync that is a long pulsing wire.   Probably should shield that one at a minimum.  If you can  shield both pulsed lights and tie the shield to your main ground  bus and leave it open at the light it should work.

  

 Some RV guys are using non shielded wire and have no complaints.  Some  Zenith guys are having issues.  But they both use the airframe as a  ground.  We use a separate ground wire which if properly done helps with  noise.

  

  

 Regards,

 Bud Yerly

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tonyrenshaw268(at)gmail.c
Guest

Posted: Thu Jul 31, 2014 8:49 pm Post subject: Shielded Strobe Light Query

Hi Jim and Heather,

Tried to send private message but email address below bounces. Can you give it to me off list please?

Rgds

Tony R.

On 1 Aug 2014, at 12:19 am, h&amp;jeuropa <butcher43(at)att.net> wrote:



 	  Quote: 	
		   

 

 Tony,

 

 Here is a link to AeroLED install instructions for a similar light which incorporates position light and strobe.  Just follow the AeroLED instructions.  You will only need 3 conductor shielded wire.  Be sure you connect the shield, ground wire and a physical connection to the LED assembly all together at the wingtip.

 

 http://www.aeroleds.com/wp-content/uploads/2013/05/Pulsar-Installation-Experimental.pdf

 

 We are using AeroLED and have no problem with noise or interference.

 

 Jim & Heather

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=427614#427614

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