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 verfügt über einen herausragenden Schutz gegen Massenmails. http://mail.yahoo.com

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.

>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 verfügt über 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.