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Joining copper wire to aluminum tube

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echristley(at)nc.rr.com
Guest

Posted: Mon Nov 13, 2006 6:26 am Post subject: Joining copper wire to aluminum tube

I'm attempting to use my pitot tube for an antennae as described here:



http://contrails.free.fr/instruments_ant_sonex.php



I'm looking for a way to reliably attach a BNC connector to the 3/16" 

aluminum tube with a short jumper wire.  It's to small to rivet, and I 

can't crush it as it still has to operate as a pitot tube.  The only 

viable alternative I've identified to date is aluminum brazing rod.



-- 

         ,|"|"|,              Ernest Christley       |

----===<{{(oQo)}}>===----    Dyke Delta Builder      |

        o|  d  |o        http://ernest.isa-geek.org  |

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sportav8r(at)gmail.com
Guest

Posted: Mon Nov 13, 2006 7:03 am Post subject: Joining copper wire to aluminum tube

You might try the flux paste for aluminum made by Solder-It company.

I've torch-soldered to aluminum wwith fair success using this.  Once

the flux/solder paste adheres to the aluminum, you can pretty much

join any other solderable metal to it at that one spot.



I bought mine online from the company, but I've since seen it at

Lowe's.  Can't recall if Lowe's had only the silver solder paste,

which won;t help you, or the aluminum paste, which is what you need.



-Bill B



On 11/13/06, Ernest Christley <echristley(at)nc.rr.com> wrote:

 	  Quote: 	
		   



 I'm attempting to use my pitot tube for an antennae as described here:



 http://contrails.free.fr/instruments_ant_sonex.php



 I'm looking for a way to reliably attach a BNC connector to the 3/16"

 aluminum tube with a short jumper wire.  It's to small to rivet, and I

 can't crush it as it still has to operate as a pitot tube.  The only

 viable alternative I've identified to date is aluminum brazing rod.



 --

          ,|"|"|,              Ernest Christley       |

 ----===<{{(oQo)}}>===----    Dyke Delta Builder      |

         o|  d  |o        http://ernest.isa-geek.org  |

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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rparigor(at)SUFFOLK.LIB.N
Guest

Posted: Mon Nov 13, 2006 10:08 am Post subject: Joining copper wire to aluminum tube

Hello Ernest



A few ideas that fell out of my head:



Use a copper pitot tube if you can



www.McMaster.com sells conductive epoxy (ain't cheap)



Buy 1 foot of Erics Copper coated aluminium wire (get both sizes if strand

sizes are different) and sand off copper so you have an aluminium to

aluminium joint, the other end you can crimp or solder, see if you can

clamp with a few aluminium clamps like adel or make some, could also put 4

strands, with lets say 1 inch contact at 12,3,6 and 9 O-Clock and wrap

with Spectra fishing line, or Size E Dacron thread, or probably even

cotton sewing thread and put a drop of Model thin CA to hold in place.



Better? Do the 4 strands of Eric aluminium wire with 1.5" contact area.

Heat shrink a 1/4" band on each end and one in the middle to hold in

position for wrap. After wrap is complete heat shrink the whole thing

(adhesive lined for good seal) or paint with something as CA is not

waterproof.



Ron Parigoris

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