[SI-LIST] Re: Flux residue on coax cable
- From: "Rich Peyton" <p2rich@xxxxxxxxxxxxx>
- To: "'Larry Miller'" <lmiller@xxxxxxxxxxxxxxxxxxxx>,<mike.hughes@xxxxxxxxxx>, <p2rich@xxxxxxxxxxxxx>,<si-list@xxxxxxxxxxxxx>
- Date: Mon, 20 Aug 2001 14:56:19 -0400
That was my response also "That it is best to remove it" although it may
not be used for a long period of time I still feel that it may still cause
intermittent problems.
** Plus it's too sticky !! :-)
Rich
-----Original Message-----
From: Larry Miller [mailto:lmiller@xxxxxxxxxxxxxxxxxxxx]
Sent: Monday, August 20, 2001 2:41 PM
To: 'mike.hughes@xxxxxxxxxx'; p2rich@xxxxxxxxxxxxx;
si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Re: Flux residue on coax cable
Organic flux is very corrosive over time. The military resisted it for years
because of failures cropping up "three years later". There are numerous
tales of network gear not working on damp days.
If it bridges the insulation and becomes conductive due to interacting with
copper it will lower the impedance in an unpredictable way. That's what
happens on TQFP pins (they start leaking at each other).
Hi impedance op amp circuits have problems; things like pH probes get very
innacurate.
Best to remove ALL of it.
Larry Miller
-----Original Message-----
From: Mike Hughes [mailto:mike.hughes@xxxxxxxxxx]
Sent: Monday, August 20, 2001 11:21 AM
To: p2rich@xxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Flux residue on coax cable
I'm not sure but I think it will eventually cause corrosion which will
affect
electrical performance.
Mike
Rich Peyton wrote:
>
> Not Bad :-)
>
> There's one effect--- any others?
>
> Other than being "Sticky" I was wondering if the cleaning( concerning
> coaxial cables ) of flux residue is more for mechanical life or if it also
> has effects on the electrical performance or characteristics at high
speeds?
>
> Rich
>
> -----Original Message-----
> From: Larry Miller [mailto:lmiller@xxxxxxxxxxxxxxxxxxxx]
> Sent: Monday, August 20, 2001 1:36 PM
> To: 'p2rich@xxxxxxxxxxxxx'; si-list@xxxxxxxxxxxxx
> Subject: RE: [SI-LIST] Flux residue on coax cable
>
> On the outside?
>
> Makes them sticky, I suppose.
>
> Sorry, I could not pass that one up.
>
> Larry Miller
>
> -----Original Message-----
> From: Rich Peyton [mailto:p2rich@xxxxxxxxxxxxx]
> Sent: Monday, August 20, 2001 5:55 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Flux residue on coax cable
>
> Content-Type: text/plain;
> charset="Windows-1252"
> Content-Transfer-Encoding: 7bit
>
> Hello All,
>
> What are the effects of flux residue on coaxial cables?
>
> Rich
>
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--
================================
Mike Hughes
Product/Test Engineer
Analog Devices, Inc.
Phone 781-937-2370
Fax 781-937-1011
================================
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