Hi Rob, thanks for your reply. > Ah, but where does the gold connect to? Sure, the gold connects to the alloy. But if the WHOLE connector is plated with gold, the connections are: Frontside : gold-gold (e.g. if a gold banana plug is used) Backside : gold-tin-copper (soldered copper wire) Under this cirumstances, there is no connection to the alloy, only to gold. I admit that I never made practical measurements. This is pure theory. But I think, it's worth to discuss about it. Regards Marten --- volt-nuts-request@febo.com <volt-nuts-request@febo.com> schrieb am Mi, 14.4.2010: > Von: volt-nuts-request@febo.com <volt-nuts-request@febo.com> > Betreff: volt-nuts Digest, Vol 8, Issue 2 > An: volt-nuts@febo.com > Datum: Mittwoch, 14. April, 2010 14:00 Uhr > Send volt-nuts mailing list > submissions to >     volt-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit >     https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > or, via email, send a message with subject or body 'help' > to >     volt-nuts-request@febo.com > > You can reach the person managing the list at >     volt-nuts-owner@febo.com > > When replying, please edit your Subject line so it is more > specific > than "Re: Contents of volt-nuts digest..." > > > Today's Topics: > >    1. low emf binding post (siebenborn) >    2. Re: low emf binding post (Rob Klein) >    3. Re: low emf binding post (Alan > Scrimgeour) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 13 Apr 2010 17:05:40 +0000 (GMT) > From: siebenborn <siebenborn@yahoo.de> > Subject: [volt-nuts] low emf binding post > To: volt-nuts@febo.com > Message-ID: <599672.47931.qm@web26604.mail.ukl.yahoo.com> > Content-Type: text/plain; charset=iso-8859-1 > > Hi, > > my name is Gerd and this is my first post to the group. > > I have a question to the experts: > > In an older thread, binding post's from POMONA, the 3770 > shall be > the first choice, if low emf is required. These binding > post are made > of tellurium copper alloy, which make this low thermal emf > possible. > Do you aggree ? > > I'm not sure : > The area which 'makes' the electrical connection is gold, > not the > the alloy. So why not use any other gold plated quality > connector ? > > Thank you ! > > Regards > > Gerd > > > > > __________________________________________________ > Do You Yahoo!? > Sie sind Spam leid? Yahoo! Mail verf?gt ?ber einen > herausragenden Schutz gegen Massenmails. > http://mail.yahoo.com > > > > > ------------------------------ > > Message: 2 > Date: Tue, 13 Apr 2010 22:14:43 +0200 > From: Rob Klein <rob.klein@smalldesign.nl> > Subject: Re: [volt-nuts] low emf binding post > To: Discussion of precise voltage measurement <volt-nuts@febo.com> > Message-ID: <4BC4D0B3.9030904@smalldesign.nl> > Content-Type: text/plain; charset=ISO-8859-1; > format=flowed > > Hi Gerd, > > siebenborn schreef: > > The area which 'makes' the electrical connection is > gold, not the > > the alloy. > Ah, but where does the gold connect to? > > So why not use any other gold plated quality connector > ? > >    > Because most "other" gold plated connectors are made of > brass, which has > significantly > higher thermal EMF against gold or copper. > > > Rob. > > > > ------------------------------ > > Message: 3 > Date: Wed, 14 Apr 2010 00:39:13 +0100 > From: "Alan Scrimgeour" <scrimgap@blueyonder.co.uk> > Subject: Re: [volt-nuts] low emf binding post > To: <siebenborn@yahoo.de>,    > "Discussion of precise voltage measurement" >     <volt-nuts@febo.com> > Message-ID: > <A552DA59CA86495F8319A37D2DFE89C1@AlanPC> > Content-Type: text/plain; format=flowed; > charset="iso-8859-1"; >     reply-type=original > > >From what I've read the best thing is to use no > plating, but you need to > make sure you don't get problems from copper oxide build up > which has a very > high thermal emf against copper. > I think you're likely to puncture any thin oxide layer when > making a > connection, so I'm not sure this is really a problem in > practice. An > application of something like Deoxit would hopefully solve > it anyway. > With gold plating I presume the temperatures either side of > the plating at > the point of contact will so similar that very little emf > will be generated > independent of what plating material is used. > Tables of thermal emf vs. copper  show brass produces > quite a low voltage. > I've never seen the figure for tellurium copper quoted. > > Alan > > > ----- Original Message ----- > From: "siebenborn" <siebenborn@yahoo.de> > To: <volt-nuts@febo.com> > Sent: Tuesday, April 13, 2010 6:05 PM > Subject: [volt-nuts] low emf binding post > > > Hi, > > my name is Gerd and this is my first post to the group. > > I have a question to the experts: > > In an older thread, binding post's from POMONA, the 3770 > shall be > the first choice, if low emf is required. These binding > post are made > of tellurium copper alloy, which make this low thermal emf > possible. > Do you aggree ? > > I'm not sure : > The area which 'makes' the electrical connection is gold, > not the > the alloy. So why not use any other gold plated quality > connector ? > > Thank you ! > > Regards > > Gerd > > > > > __________________________________________________ > Do You Yahoo!? > Sie sind Spam leid? Yahoo! Mail verf?gt ?ber einen > herausragenden Schutz > gegen Massenmails. > http://mail.yahoo.com > > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > > > > > > ------------------------------ > > _______________________________________________ > volt-nuts mailing list > volt-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > End of volt-nuts Digest, Vol 8, Issue 2 > *************************************** > __________________________________________________ Do You Yahoo!? Sie sind Spam leid? Yahoo! Mail verfügt über einen herausragenden Schutz gegen Massenmails. http://mail.yahoo.com

1. low emf binding post (siebenborn)
2. Re: low emf binding post (Rob Klein)
3. Re: low emf binding post (Alan

Sent from my Banana Jr. mobile device On Apr 14, 2010, at 5:32 AM, siebenborn <siebenborn@yahoo.de> wrote: > Hi Rob, > > thanks for your reply. > >> Ah, but where does the gold connect to? > > Sure, the gold connects to the alloy. > > But if the WHOLE connector is plated with gold, > the connections are: > > Frontside : gold-gold (e.g. if a gold banana plug is used) > Backside : gold-tin-copper (soldered copper wire) > > Under this cirumstances, there is no connection to the alloy, > only to gold. > > I admit that I never made practical measurements. > This is pure theory. But I think, it's worth to discuss > about it. > > > Regards > > Marten > > > > --- volt-nuts-request@febo.com <volt-nuts-request@febo.com> schrieb > am Mi, 14.4.2010: > >> Von: volt-nuts-request@febo.com <volt-nuts-request@febo.com> >> Betreff: volt-nuts Digest, Vol 8, Issue 2 >> An: volt-nuts@febo.com >> Datum: Mittwoch, 14. April, 2010 14:00 Uhr >> Send volt-nuts mailing list >> submissions to >> volt-nuts@febo.com >> >> To subscribe or unsubscribe via the World Wide Web, visit >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> or, via email, send a message with subject or body 'help' >> to >> volt-nuts-request@febo.com >> >> You can reach the person managing the list at >> volt-nuts-owner@febo.com >> >> When replying, please edit your Subject line so it is more >> specific >> than "Re: Contents of volt-nuts digest..." >> >> >> Today's Topics: >> >> 1. low emf binding post (siebenborn) >> 2. Re: low emf binding post (Rob Klein) >> 3. Re: low emf binding post (Alan >> Scrimgeour) >> >> >> --- >> ------------------------------------------------------------------- >> >> Message: 1 >> Date: Tue, 13 Apr 2010 17:05:40 +0000 (GMT) >> From: siebenborn <siebenborn@yahoo.de> >> Subject: [volt-nuts] low emf binding post >> To: volt-nuts@febo.com >> Message-ID: <599672.47931.qm@web26604.mail.ukl.yahoo.com> >> Content-Type: text/plain; charset=iso-8859-1 >> >> Hi, >> >> my name is Gerd and this is my first post to the group. >> >> I have a question to the experts: >> >> In an older thread, binding post's from POMONA, the 3770 >> shall be >> the first choice, if low emf is required. These binding >> post are made >> of tellurium copper alloy, which make this low thermal emf >> possible. >> Do you aggree ? >> >> I'm not sure : >> The area which 'makes' the electrical connection is gold, >> not the >> the alloy. So why not use any other gold plated quality >> connector ? >> >> Thank you ! >> >> Regards >> >> Gerd >> >> >> >> >> __________________________________________________ >> Do You Yahoo!? >> Sie sind Spam leid? Yahoo! Mail verf?gt ?ber einen >> herausragenden Schutz gegen Massenmails. >> http://mail.yahoo.com >> >> >> >> >> ------------------------------ >> >> Message: 2 >> Date: Tue, 13 Apr 2010 22:14:43 +0200 >> From: Rob Klein <rob.klein@smalldesign.nl> >> Subject: Re: [volt-nuts] low emf binding post >> To: Discussion of precise voltage measurement <volt-nuts@febo.com> >> Message-ID: <4BC4D0B3.9030904@smalldesign.nl> >> Content-Type: text/plain; charset=ISO-8859-1; >> format=flowed >> >> Hi Gerd, >> >> siebenborn schreef: >>> The area which 'makes' the electrical connection is >> gold, not the >>> the alloy. >> Ah, but where does the gold connect to? >>> So why not use any other gold plated quality connector >> ? >>> >> Because most "other" gold plated connectors are made of >> brass, which has >> significantly >> higher thermal EMF against gold or copper. >> >> >> Rob. >> >> >> >> ------------------------------ >> >> Message: 3 >> Date: Wed, 14 Apr 2010 00:39:13 +0100 >> From: "Alan Scrimgeour" <scrimgap@blueyonder.co.uk> >> Subject: Re: [volt-nuts] low emf binding post >> To: <siebenborn@yahoo.de>, >> "Discussion of precise voltage measurement" >> <volt-nuts@febo.com> >> Message-ID: >> <A552DA59CA86495F8319A37D2DFE89C1@AlanPC> >> Content-Type: text/plain; format=flowed; >> charset="iso-8859-1"; >> reply-type=original >> >>> From what I've read the best thing is to use no >> plating, but you need to >> make sure you don't get problems from copper oxide build up >> which has a very >> high thermal emf against copper. >> I think you're likely to puncture any thin oxide layer when >> making a >> connection, so I'm not sure this is really a problem in >> practice. An >> application of something like Deoxit would hopefully solve >> it anyway. >> With gold plating I presume the temperatures either side of >> the plating at >> the point of contact will so similar that very little emf >> will be generated >> independent of what plating material is used. >> Tables of thermal emf vs. copper show brass produces >> quite a low voltage. >> I've never seen the figure for tellurium copper quoted. >> >> Alan >> >> >> ----- Original Message ----- >> From: "siebenborn" <siebenborn@yahoo.de> >> To: <volt-nuts@febo.com> >> Sent: Tuesday, April 13, 2010 6:05 PM >> Subject: [volt-nuts] low emf binding post >> >> >> Hi, >> >> my name is Gerd and this is my first post to the group. >> >> I have a question to the experts: >> >> In an older thread, binding post's from POMONA, the 3770 >> shall be >> the first choice, if low emf is required. These binding >> post are made >> of tellurium copper alloy, which make this low thermal emf >> possible. >> Do you aggree ? >> >> I'm not sure : >> The area which 'makes' the electrical connection is gold, >> not the >> the alloy. So why not use any other gold plated quality >> connector ? >> >> Thank you ! >> >> Regards >> >> Gerd >> >> >> >> >> __________________________________________________ >> Do You Yahoo!? >> Sie sind Spam leid? Yahoo! Mail verf?gt ?ber einen >> herausragenden Schutz >> gegen Massenmails. >> http://mail.yahoo.com >> >> >> _______________________________________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. >> >> >> >> >> >> ------------------------------ >> >> _______________________________________________ >> volt-nuts mailing list >> volt-nuts@febo.com >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> >> End of volt-nuts Digest, Vol 8, Issue 2 >> *************************************** >> > > __________________________________________________ > Do You Yahoo!? > Sie sind Spam leid? Yahoo! Mail verfügt über einen herausragenden Sc > hutz gegen Massenmails. > http://mail.yahoo.com > > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.