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09-14-2016, 06:36 PM
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Join Date: Aug 2014
Location: Columbus, IN
Posts: 107
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I made all of my own cables except this one, as I bought it for convenience at the same time I was buying other hardware. It's one of the first cables I installed in the fuselage to run to the back to my ADAHRS unit.
The color code of the wire doesn't bother me. It's that I bought part number "SV-NET-15CP" for $55 from Aircraft Spruce, listed on the Dynon Avionics page, and which is marketed as a Dynon part (and says so on the invoice..I still have it). What I got was a cable that someone else made. When I ordered, I didn't say "substitute in something equivalent".
My intent of the post was just to pass the info along for anyone else who may be buying these cables from Spruce.
__________________
N29213 - RV8 completed 2017
RV10 - started 2018, final finish work now.
Columbus, IN - KBAK
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09-14-2016, 07:35 PM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,435
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If you price out the parts that make up a cable like that, you'll see that there's a decent opportunity to either save some money if you make your own or make a few bucks if you're in the business of selling avionics.
The Skyview manual describes these cables fairly well, and they aren't that hard to make. If you're new to it, as I was, they do take a bit of time. But it's always fun to learn a new skill.
Caveat - I'm building an RV-3B so my concept of how easy something is or fast a process is might be different than other people's.
Dave
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09-15-2016, 05:11 AM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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One thing that you should confirm, are the appropriate wire pairs for data twisted. I believe Dynon calls that out as required.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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09-15-2016, 07:10 AM
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Join Date: Nov 2011
Location: Amelia, Va
Posts: 268
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Aircraft Spruce
Aircraft spruce has a whole department that makes harnesses for all sorts of avionics. I got a harness for a Garmin radio made by them and I was really happy with it.
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09-15-2016, 10:29 AM
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Join Date: Aug 2014
Location: Victoria, Tx
Posts: 421
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Quote:
Originally Posted by Carl Froehlich
There is nothing magical about Dynon SkyView network cables. You can make your own if you mind the need to have the data lines twisted.
Data is on pins 1, 6, 4 and 8. For these two pairs you can use a single four conductor, 22 gauge shielded wire like this: http://www.steinair.com/product/22-g...ctor-shielded/
Power and ground are on pins 2, 7, 3 and 9. Here you can again use the same type of single four conductor shielded wire.
The remaining pin, #5 is for EMS aux voltage. Here a single #22 wire is fine.
Buy some pins, pin crimp tool and D connectors from Stein and you have custom made SKyView network cables.
Carl
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I made my own cables and I twisted two of the pairs but Dynon did not call out for the others to be shielded. Did I miss something?
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09-15-2016, 10:41 AM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,597
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Quote:
Originally Posted by 219PB
I made my own cables and I twisted two of the pairs but Dynon did not call out for the others to be shielded. Did I miss something?
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Shielded wire is not necessary, but it is a boat load simpler than trying to twist wires together (the wires are twisted in the cable) and it is easy to install in conduits and such.
Carl
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09-15-2016, 10:59 AM
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Join Date: Aug 2009
Location: Winnipeg, Canada
Posts: 214
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Please excuse my ignorance as I haven't looked into any of the instrument systems yet but if you need to make cables with twisted pairs, couldn't you use CAT-5 or CAT-6 network cable?
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09-15-2016, 11:26 AM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,597
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Quote:
Originally Posted by sbal0906
Please excuse my ignorance as I haven't looked into any of the instrument systems yet but if you need to make cables with twisted pairs, couldn't you use CAT-5 or CAT-6 network cable?
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Recommend not using this type of wire as you should stay with Tefzel type wire.
Stein also sells already twisted wire if that is your preference.
Carl
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09-15-2016, 11:28 AM
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Join Date: Jan 2005
Location: NC25
Posts: 3,508
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Quote:
Originally Posted by sbal0906
Please excuse my ignorance as I haven't looked into any of the instrument systems yet but if you need to make cables with twisted pairs, couldn't you use CAT-5 or CAT-6 network cable?
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CAT-5 and CAT-6 network cable is typically SOLID copper wire. SOLID wire is not used in aircraft because the vibration makes them brittle.
__________________
Gary A. Sobek
NC25 RV-6 Flying
3,400+ hours
Where is N157GS
Building RV-8 S/N: 80012
To most people, the sky is the limit.
To those who love aviation, the sky is home.
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09-15-2016, 11:34 AM
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Join Date: May 2007
Location: Inver Grove Hgts, MN
Posts: 329
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Quote:
Originally Posted by scard
Is this really the state of experimental building? The documented color of a manufactured wire? I'm not an old fart (I don't think), but still amazed.
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Use any colors you want. The reason to document them is for troubleshooting or modification. If it is a short run and both ends are accessible you can use all white and buzz 'em out if you have to.
Or, like Red Green says "If you're made of money" you can use white and laser mark 'em...
__________________
Mike Hilger
RV-6 N207AM w/G3X, 1,600 hours +
South St. Paul, MN (KSGS)
A&P, EAA Tech Counselor
We're all here because we're not all there...
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