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3 conductor AWG18 cable

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michele.delsol(at)microsi
Guest

Posted: Tue Jan 24, 2006 11:25 pm Post subject: 3 conductor AWG18 cable

I am looking for 3 conductor AWG18 cable to hook up the strobe lights.

Steinair does not have it =96 does any one have a thought on a source for

this?



Thanks,



Michele



RV8 fuselage

Bruce(at)glasair.org
Guest

Posted: Tue Jan 24, 2006 11:41 pm Post subject: 3 conductor AWG18 cable

Wheelen Install kit.



Bruce

www.glasair.org

 



--

rv8ch

Joined: 10 Jan 2006
Posts: 250
Location: Switzerland

Posted: Wed Jan 25, 2006 12:33 am Post subject: 3 conductor AWG18 cable

These guys have it:



  http://www.strobesnmore.com/



Mickey



Michle Delsol wrote:

 	  Quote: 	
		   

 

 I am looking for 3 conductor AWG18 cable to hook up the strobe lights.

 Steinair does not have it =96 does any one have a thought on a source for

 this?

 

 

 

 Thanks,

 

 Michele

 

 RV8 fuselage

 

 


	


-- 

Mickey Coggins

http://www.rv8.ch/

#82007 finishing

do not archive

_________________
Mickey Coggins
http://www.rv8.ch/

jmfpublic(at)comcast.net
Guest

Posted: Thu Jan 26, 2006 12:28 am Post subject: 3 conductor AWG18 cable

Michele asked:



I am looking for 3 conductor AWG18 cable to hook up the strobe lights.

Steinair does not have it  Does any one have a thought on a source for

this?



This was discussed one or two years ago.  I don't recall the numbers, but the losses from using 22 gauge wire, which is much lighter, and available from Steinair, are quite acceptable.  I'm using 22 gauge three conductor shield wire for my Whelen strobes, and expect no problem.  I was very impressed at the weight of the shielded 18 gauge supplied by Whelen.  The 22 gauge, needing a smaller shield, is much lighter.  Search the archive if you truly believe that 18 gauge is needed.



Jim Foerster, jmfpublic(at)comcast_dot_net  Jabiru J400 wiring

michele.delsol(at)microsi
Guest

Posted: Thu Jan 26, 2006 2:02 am Post subject: 3 conductor AWG18 cable

I should have been a little more specific - my question related to feeding

the power supply and synching three strobes together. Since the current is

not steady I prefer to shield the feed lines - 4 amps on 18awg should be OK.

On the strobe light side, since we are dealing with 400V or so, amperage is

very low and transient so 22awg should be OK.  



Michle



--

brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu Jan 26, 2006 7:46 am Post subject: 3 conductor AWG18 cable

Michle Delsol wrote:

 	  Quote: 	
		   

 

 I should have been a little more specific - my question related to feeding

 the power supply and synching three strobes together. Since the current is

 not steady I prefer to shield the feed lines - 4 amps on 18awg should be OK.

 On the strobe light side, since we are dealing with 400V or so, amperage is

 very low and transient so 22awg should be OK.  


	


Actually, amperage is very high on the HV side because you are

discharging a capacitor through a virtual dead short (the ionized gas in

the flash tube). The pulse is fairly short so the average current is low

but the peak is quite high. Use a heavier wire.



Also, shielding won't help you much. The high-current pulse will produce

one heck of a magnetic field on the wire which the non-magnetic

shielding won't do anything to stop. The best thing to do is to make

sure that the return (ground) wire is parallel to and closely bound to

the HV wire. The magnetic fields will be equal and opposite and will

cancel each other out. That is all the shielding you need.



As for the synchronization between the power supplies, those pulses are

low-voltage, low-current signals between the power supply boxes. You

don't really need a heavy wire there.



-- 

Brian Lloyd                         2243 Cattle Dr.

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

rv8ch

Joined: 10 Jan 2006
Posts: 250
Location: Switzerland

Posted: Thu Jan 26, 2006 9:54 am Post subject: 3 conductor AWG18 cable

 	  Quote: 	
		   Also, shielding won't help you much. The high-current pulse will produce

 one heck of a magnetic field on the wire which the non-magnetic

 shielding won't do anything to stop. The best thing to do is to make

 sure that the return (ground) wire is parallel to and closely bound to

 the HV wire. The magnetic fields will be equal and opposite and will

 cancel each other out. That is all the shielding you need.


	


Great info.  The strobe wires I have, which came with the strobe

kit, have three wires, and the whole bundle is shielded.  I imagine

one wire is a ground, and one of the other two must be the HV wire,

but any idea what the third would be?  Just curious.



Thanks,

Mickey



-- 

Mickey Coggins

http://www.rv8.ch/

#82007 finishing

do not archive

_________________
Mickey Coggins
http://www.rv8.ch/

nuckollsr(at)cox.net
Guest

Posted: Thu Jan 26, 2006 3:03 pm Post subject: 3 conductor AWG18 cable

At 06:53 PM 1/26/2006 +0100, you wrote:



 	  Quote: 	
		  

<mick-matronics(at)rv8.ch>



 > Also, shielding won't help you much. The high-current pulse will produce

 > one heck of a magnetic field on the wire which the non-magnetic

 > shielding won't do anything to stop. The best thing to do is to make

 > sure that the return (ground) wire is parallel to and closely bound to

 > the HV wire. The magnetic fields will be equal and opposite and will

 > cancel each other out. That is all the shielding you need.



Great info.  The strobe wires I have, which came with the strobe

kit, have three wires, and the whole bundle is shielded.  I imagine

one wire is a ground, and one of the other two must be the HV wire,

but any idea what the third would be?  Just curious.


	


   Ground, HV out to tube, trigger voltage to fire it.

   See Figure 12-4 in the 'Connection . . .



   Bob . . .

Bill Denton

Joined: 10 Jan 2006
Posts: 97
Location: Chicago, IL USA

Posted: Thu Jan 26, 2006 3:17 pm Post subject: 3 conductor AWG18 cable

Don't know if it's relevant, but Whelen now sells combined

strobe/nav/position lights, run off a single, typically fuselage-mounted,

strobe controller. They just use one shielded cable out to the wing tips,

with conductors for both the strobes and the nav/position lights.



Is it possible that you have some of that cable?





--

Bruce(at)glasair.org
Guest

Posted: Thu Jan 26, 2006 3:53 pm Post subject: 3 conductor AWG18 cable

Whelen literature calls it , Anode, Cathode, and Trigger.



Bruce

www.glasair.org

 



--

brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu Jan 26, 2006 4:52 pm Post subject: 3 conductor AWG18 cable

Mickey Coggins wrote:



 	  Quote: 	
		   Great info.  The strobe wires I have, which came with the strobe

 kit, have three wires, and the whole bundle is shielded.  I imagine

 one wire is a ground, and one of the other two must be the HV wire,

 but any idea what the third would be?  Just curious.


	


There is ground, B+ (about 400V), and trigger. The trigger is a very low

current but high voltage (about 3000V) to give the xenon in the tube a

"kick" to start it ionizing. Once that happens the capacitor on the

+400V line discharges through the tube until there is (virtually)

nothing left in the capacitor. At that point the tube winks out and the

capacitor charges again. When it comes time for the flashtube to light

off again, the power supply sends out the 3000V pulse on the trigger

line and the cycle starts all over again.



-- 

Brian Lloyd                         2243 Cattle Dr.

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

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