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June 2009

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Subject:
From:
Bev Christian <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Bev Christian <[log in to unmask]>
Date:
Tue, 9 Jun 2009 10:43:31 -0400
Content-Type:
text/plain
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text/plain (179 lines)
Hetal,
It doesn't work that way!  If you sign on, you get them ALL.  You can sign up for a daily dump rather than piecemeal though.
Bev
RIM

-----Original Message-----
From: Hetal Shah [mailto:[log in to unmask]] 
Sent: Tuesday, June 09, 2009 10:42 AM
To: 'TechNet E-Mail Forum'; Bev Christian
Subject: RE: [TN] Green Junk in Wire

Hello Technet,
Please donot send an email which are not concerned with our questions.
Thank you 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Tuesday, June 09, 2009 7:33 AM
To: [log in to unmask]
Subject: Re: [TN] Green Junk in Wire

Steve,
Just a wild idea, started off by Dewey's witticism - is there any chance
that the green stuff is just dye in the insulation material?
Bev
RIM 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, June 09, 2009 10:23 AM
To: [log in to unmask]
Subject: Re: [TN] Green Junk in Wire

Hi Karen,

The wire is PTFE Insulated, and these wires have not had any voltage
applied.

We've been using this flux and building these cables for quite some time,
and have not seen this before. The only thing that has really changed is
with the batches of wire.

The flux complies with what is called out in 3.3 of J-STD-004. Can you
elaborate on why you would use a ROl1 over a ORL0?

Steve  

-----Original Message-----
From: Karen Tellefsen [mailto:[log in to unmask]]
Sent: Tuesday, June 09, 2009 9:04 AM
To: TechNet E-Mail Forum; Steve Gregory
Subject: Re: [TN] Green Junk in Wire

I would not have used ORL0 flux on braided wire shielding, but rather ROL1.

This sort of looks like corrosion of telephone subscriber wires, i.e. the
wires inside the customer's premises between the telephone jack and the
"Network interface device."

Is there any voltage on the shieiding wrt ground or the signal wire?  Is the
shielding covered with any insulation (it looks like it is bare)?

Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069


Steve Gregory <[log in to unmask]>

Good Morning!

We've just had something come-up that really has a few of us scratching our
heads around here.

To preface this; we have a mechanical assembly building where we put
cabinents and boxes together plus do some cable and harness assembly.
Yesterday one of engineers called me and said that they were seeing some
green stuff on some of the cables that we've built and said that I should
come and take a look at it. While I was walking over to the other building
it was thinking to myself; "I hope that somebody didn't get a hold of the
wrong flux or something...".

When I got there, I was really suprised at what I saw:

http://stevezeva.homestead.com/files/Green_Junk_1.jpg

http://stevezeva.homestead.com/files/Green_Junk_2.jpg

http://stevezeva.homestead.com/files/Green_Junk_3.jpg

http://stevezeva.homestead.com/files/Green_Junk_Close.jpg

The photos that you see come from a cable assembly that is about 3-feet
long, and we're seeing it on cable assemblies that are longer. The wire in
the assembly is a PTFE insulated single conductor shielded and jacketed
cable. The conductor and shield is silver plated OFHC copper.
The photos are taken from a section in the middle of the wire well away from
any area that soldering has been done. The shields of all the wires in the
bundle get soldered together at each end using a ORL0 wire solder and flux.
The green substance appears throughout the wires. In "Green Junk 3", you can
see how the green is with a group of the strands of the braided shield and
how it spirals around the wire.

It goes without saying that I'm contacting the wire manufacturer, and I'm
sending out a cable assembly for analysis. But have any of you ever seen
this before?

Steve




Enthone GmbH  Geschäftsführer: Knut Balzer, Luc de Croo, Jürgen Dietrich
Amtsgericht Düsseldorf  HRB 45276 USt-Id-Nr. DE 811 205 946 


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