"Bert Craig" wrote in message
...
I just received a gift of 10 silver plated body/gold plated pin/Teflon
dielectric PL-259's made by J&I. I normally use Amphenol 83-1SP's for all
my PL-259 needs. I was just wondering if there's be any dissimilar metal
corrosion if I used these with non-gold plated receptacle SO-239's?

Funny thing is...upon looking at some of the SO-239's on my rigs, tuners,
etc., some of them actually sport the gold plated receptacle SO-239. I'd
never even thought to look before, hi.

Any comment re. any experiences w/J&I PL-259's would be greatly
appreciated. Tnx in advance es...

--
Vy 73 de Bert
WA2SI
FISTS #9384
QRP ARCI #11782

P.S. Shamelessly soliciting CW QSO's from AK, NE & WY for WAS QRP CW.

Can't swear to it, but I seem to recall a problem with gold/tin interfacing.
Gold migration?

Tam/WB2TT

On Mon, 7 Feb 2005 17:32:57 -0500, "Tam/WB2TT"
wrote:

Can't swear to it, but I seem to recall a problem with gold/tin interfacing.
Gold migration?

Tam/WB2TT

Usually gold to tin is ok. What can be a problem is if the gold is
over copper rather than nickel for the edge card connectors. I had a
few computers that were "poisoned" with connectors that had gold over
either poor nickel or non-existent nickel plate and they were very
problematic with copper migration. They developed a "shake well
before using" problem requiring the system to have the cards pulled
and reinserted to break through the film that resulted. The gold
connectors tend to loose their gold shine and turn greensih to dull
gray if thats a problem. Never had that problem with PL259s/SO239s.

I have had some cheap silver/gold PL259s given to me that were
dimensionally sloppy, likely cheap manufacturing.

Allison
KB1GMX

wrote in message
...
On Mon, 7 Feb 2005 17:32:57 -0500, "Tam/WB2TT"
wrote:

Can't swear to it, but I seem to recall a problem with gold/tin
interfacing.
Gold migration?

Tam/WB2TT

Usually gold to tin is ok. What can be a problem is if the gold is
over copper rather than nickel for the edge card connectors. I had a
few computers that were "poisoned" with connectors that had gold over
either poor nickel or non-existent nickel plate and they were very
problematic with copper migration. They developed a "shake well
before using" problem requiring the system to have the cards pulled
and reinserted to break through the film that resulted. The gold
connectors tend to loose their gold shine and turn greensih to dull
gray if thats a problem. Never had that problem with PL259s/SO239s.

I have had some cheap silver/gold PL259s given to me that were
dimensionally sloppy, likely cheap manufacturing.

Allison
KB1GMX

Bingo! You jogged my mind. I knew it had something to do with a card edge
connector.

Tam

Can't swear to it, but I seem to recall a problem with gold/tin
interfacing.
Gold migration?

Where I've seen this, is when the tin frets, with flakes of tin oxide that
build up under the gold, and literally push the fingers away. Tin-Tin
allows a gas-tight contact that dosen't fret, but the tin-gold is bad news,
in a finger-type connector. Motion, even micro-scale heating and cooling
motion, makes it happen.

I just helped a client through one of these this winter, someone changed a
part number and ordered tin connectors for one half of what was supposed to
be a gold-gold pair.

A treatment of De-Oxit helps a lot, but the real solution of course, is not
to use tin against gold in that situation..

I don't know if it would affect something like a PL-259 though.