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Subject: Re: Reducing contact resistance for low volt use?
Date: Wed, 11 Dec 2002 10:00:00 -0800
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Problem with pogo pins is that there's resistance
in the signal
path due to the sliding contacts. That's gonna be
and eventually lead to welding the sliding parts
Need to have solidly clamped
connections in the signal path. The springiness
that holds them
against the battery needs to be outside the
Think I'll go measure some resistances.
John Larkin wrote:
> On Wed, 11 Dec 2002 05:37:37 GMT, jmuchow@SPAMMENOTcamlight.com (John
> Muchow) wrote:
> >>>>there's lots of stuff like this...
> >Thanks for the links John. It seems that I was using the wrong search
> >terms when I went looking for the stuff. The Chemtronics CircuitWorks
> >Silver Conductive Grease looks good.
> >I also received a tip about Conducto-Lube, but their web site had no
> >tech info on the stuff other than the MSDS which stated that the stuff
> >was 65%-75% Silver and 25%-35% Mineral Oil. No conductivity data.
> >The Chemtronics Silver Conductive Grease MSDS states that Silver is
> >55%-85% and Silicone Oil as 15%-45%.
> >So, one could be better than the other, no way to know. I guess that
> >they are about the same, more or less. If I wanted to, I could
> >probably separate some of the oil (let it settle?) from the silver to
> >decrease the resistance...but only up to a certain point. Might be
> >best just to use it as is.
> >The carbon-filled greases also seem to be pretty good but the silver
> >ones have lower spec'd resistances so I'll probably go with them.
> >Thanks again everyone for your tips, links, and suggestions!
> >John "I gotta get better at using those search engines" Muchow
> But you should realize that 'conductive' grease and epoxy are, in
> bulk, not very conductive. It's best to make a solid metal contact
> that fits the battery terminals well, and fill in the small remaining
> gap with stuff like this.
> Hey, how about a bundle of pogo pins? I just bought a three *pound*
> bag of pogos on ebay... several thousand for about a penny each.
Bunch of stuff For Sale and Wanted at the link
Tek 2465, TFT projector, ham radio, 30pS pulser
Tektronix Concept Books...
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