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JOHN TIPTON
Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England
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 Posted: Mon Mar 12, 2012 6:40 am Post subject: Joining 'coax' cable |
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Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing
Best regards
John
[quote][b]
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jay(at)horriblehyde.com
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| Posted: Mon Mar 12, 2012 7:37 am Post subject: Joining 'coax' cable |
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The easiest is to terminate the co-ax with a normal BNC connector, say a male one, at the point where the fuselage/ wing join is and then put a corresponding female BNC connector on the wing side of the co-ax. If you want to get fancy, use a chassis mounted male connection on the fuselage side and then the wing side plugs into that and no further support is required at that point. To be able to use BNC connectors the strobe ‘co-ax’ would have to have similar dimensions to that of an antenna cable however.
If that is not the case you can use simple faston type crimp connectors. Since the impedance of the strobe ‘co-ax’ is not that important (because it is actually just a shielded cable and not a true co-axial cable in an RF sense) you simply terminate the shield and core to insulated crimp lugs and affect the connection using these. Just keep the ‘tails’ of the shield and core short. Having the core ‘outside’ of the shield for a short distance (3-6 inches) will not matter as long as there are not any other sensitive cables running next to it right there.
Two pin AMPHENOL type, or similar MOLEX connectors will also do the job well (see http://za.rs-online.com/web/p/connector-accessories/2468414/?searchTerm=2468414&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B367D247C5E5C647B377D247C5E5C647B31307D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D424552267573743D323436383431342677633D4E4F4E4526)
Jay
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of JOHN TIPTON
Sent: 12 March 2012 04:35 PM
To: aeroelectric-list(at)matronics.com
Subject: Joining 'coax' cable
Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing
Best regards
John
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01234567
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tim2542(at)sbcglobal.net
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| Posted: Mon Mar 12, 2012 8:05 am Post subject: Joining 'coax' cable |
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Male/Female BNC connectors sealed in shrink tube.
Or get fancy and install a BNC bulkhead connector in the wing root or similar location.
Tim
Sent from my iPad
On Mar 12, 2012, at 7:35 AM, JOHN TIPTON <jmtipton(at)btopenworld.com (jmtipton(at)btopenworld.com)> wrote:
[quote]Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing
Best regards
John
| Quote: |
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st">http://www.matronics.com/Navigator?AeroElectric-List
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cs.com
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matronics.com/contribution
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[b]
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nuckolls.bob(at)aeroelect
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| Posted: Mon Mar 12, 2012 1:19 pm Post subject: Joining 'coax' cable |
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At 09:35 AM 3/12/2012, you wrote:
Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the
wings, and 'fuse' to the hanger, while I'm Ok with the wires from the
landing light, nav light etc to be conntected inside the fuse when
the wings are mounted with connectors, what do I do about about the
'coax' for the strobe light - in an ideal world I guess one continous
lead, but can I join two lengths of 'coax' together, what connector
do I use, so as not to compromise the integrity of the 'coax' sheathing
Strobe lights are not wired with coax . . . but 3-wire
shielded cable. You can break this cable for the purpose
of inserting a connector but it would be better just to
disconnect the wire at the power supply and pull the
'stub' out of the fuselage. If you DO put a connector in,
use a 4 pin connector (white nylon mate-n-lock or
waldom-molex)
http://www.radioshack.com/product/index.jsp?productId=2103250
and treat the shield connections just as you would a 4th wire.
Bob . . .
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JOHN TIPTON
Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England
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| Posted: Tue Mar 13, 2012 1:28 am Post subject: Joining 'coax' cable |
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I didn't make it clear, but 'Bob' picked it up that the lead is a three wire shielded cable that I was refering to - thank you Bob
From: Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com>;
To: <aeroelectric-list(at)matronics.com>;
Subject: Re: Joining 'coax' cable
Sent: Mon, Mar 12, 2012 9:16:50 PM
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <[url=javascript:return]nuckolls.bob(at)aeroelectric.com[/url]>
At 09:35 AM 3/12/2012, you wrote:
Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing
Strobe lights are not wired with coax . . . but 3-wire
shielded cable. You can break this cable for the purpose
of inserting a connector but it would be better just to
disconnect the wire at the power supply and pull the
'stub' out of the fuselage. If you DO put a connector in,
use a 4 pin connector (white nylon mate-n-lock or
waldom-molex)
http://www.radioshack.com/product/index.jsp?productId=2103250
and treat the shield connections just as you would a 4th wire.
Bob= --> http://forums.matronics.combsp; -Matt Dom/contribution" target=_blank ==
[quote][b]
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bakerocb
Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA
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| Posted: Tue Mar 13, 2012 4:39 am Post subject: Joining 'coax' cable |
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3/13/2012
Hello John, Unless you are going to be doing frequent wing removal and
reinstallation in your airplane (highly unlikely for an RV 9) the best
solution (where the run of any wire inside the fuselage permits) is to have
the wing to fuselage wires run continuously.
Here is how you do it:
1) Leave a significant loop of the wire coiled in the vicinity of the wing
root.
2) Mount the wing on the fuselage.
3) Thread the wire to the intended destination inside the fuselage and
install the appropriate device matching connector on the wire end.
4) Connect to the device and fly the plane.
5) Much later (years?) if it is necessary to remove the wings, disconnect
the wire wire from the device, cut the connector off the end of the wire,
pull the wire back out of the fuselage, and remove the wings.
6) When it is time to reinstall the wings repeat steps 3 and 4 above. This
process can be repeated many times before you run out of wire in the loop
created initially.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
PS: On calling shielded cable coax: Any time you call two different things
by the same name or the same thing by two different names sooner of later in
some communication process that situation will jump up and bite you.
=================================================================
Time: 07:40:49 AM PST US
From: JOHN TIPTON <jmtipton(at)btopenworld.com>
Subject: Joining 'coax' cable
Hi Guys (Bob)=0A-=0AI will be completing the wiring to out RV9a prior to
moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires fro
m the landing light, nav light etc to be conntected inside the fuse when th
e wings are mounted with connectors, what do I-do about about the 'coax'
for the strobe light - in an ideal world I guess one continous lead, but ca
n I join two lengths of 'coax' together, what connector do I-use, so as n
ot to compromise the integrity of the 'coax' sheathing=0A-=0ABest regards
=0A-=0AJohn
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