Hello. Thank to the contribution of Dan Kemppainen, Herbert Poetzl and Andreas Bergman, I had the opportunity to test more alloys. As before, a really low EMF (< 2uV/K) hasn't been identified. Measurements have been done between water ice point and boiling point with Agilent 34401A. I don't expect the curves be linear, but here it's assumed they are. All experiments have been repeated. Copper - Sn96.5/Ag3/Cu0.5 -> 3.35uV/K (first experiment) Copper - Sn96.5/Ag3/Cu0.5 -> 3.38uV/K (second experiment) Copper - Sn95.5/Ag3.8/Cu0.7 -> 3.22uV/K (first experiment) Copper - Sn95.5/Ag3.8/Cu0.7 -> 3.25uV/K (second experiment) Copper - Sn60/Pb40 -> 3.34uV/K (first experiment) Copper - Sn60/Pb40 -> 3.35uV/K (second experiment) Copper - Pb92.5/Sn5/Ag2.5 -> 3.02uV/K (first experiment) Copper - Pb92.5/Sn5/Ag2.5 -> 3.05uV/K (second experiment) Copper - Sn99.3/Cu0.7 -> 3.43uV/K (first experiment) Copper - Sn99.3/Cu0.7 -> 3.45uV/K (second experiment) Copper - Sn96/Ag4 -> 3.33uV/K (first sample, first experiment) Copper - Sn96/Ag4 -> 3.32uV/K (first sample, second experiment) Copper - Sn96/Ag4 -> 3.28uV/K (second sample, first experiment, thanks to Andreas) Copper - Sn96/Ag4 -> 3.24uV/K (second sample, second experiment, thanks to Andreas) Copper - Sn97/Cu3 -> 3.48uV/K (first experiment) Copper - Sn97/Cu3 -> 3.44uV/K (second experiment) Copper - Sn88.6/Cu1.8/Ag9.5/Au0.1 -> 3.05uV/K (first experiment, thanks to Andreas) Copper - Sn88.6/Cu1.8/Ag9.5/Au0.1 -> 3.04uV/K (second experiment, thanks to Andreas) Copper - Sn95.5/Cu0.7/Ag3.8 -> 3.28uV/K (first experiment, thanks to Andreas) Copper - Sn95.5/Cu0.7/Ag3.8 -> 3.27uV/K (second experiment, thanks to Andreas) Copper - Sn42/Bi57.6/Ag0.4 -> 4.43uV/K (first experiment, thanks to Herbert) Copper - Sn42/Bi57.6/Ag0.4 -> 4.46uV/K (second experiment, thanks to Herbert) Copper - Sn100C (Sn-Cu-Ni+Ge) -> 3.45uV/K (first experiment, thanks to Dan) Copper - Sn100C (Sn-Cu-Ni+Ge) -> 3.41uV/K (second experiment, thanks to Dan) Copper - Brass -> 3.30uV/K The best one keeps to be the Pb92.5/Sn5/Ag2.5, the best between the lead free ones is the Sn88.6/Cu1.8/Ag9.5/Au0.1. If someone has other alloys to suggest me to test I'll be happy to do it. I'll be very happy to pass all the samples to a fellow who wish to repeat the experiment, provide that he/she will post results here and in turn, will pass everything to the second one who will do the same. Best regards, Andrea Baldoni

Andrea, even though they crush my hopes of finding a readily available low EMF solder, thank you for posting these results. I could send you some old Kester solder that I picked up more than 10 years ago but it is only marked SN96 and I have no reason to believe it is any different than the Sn96Ag4 solder that you tested. On Sun, 30 Oct 2016 16:25:27 +0100, you wrote: >Hello. >Thank to the contribution of Dan Kemppainen, Herbert Poetzl and Andreas Bergman, >I had the opportunity to test more alloys. As before, a really low EMF (< 2uV/K) >hasn't been identified. > >... > >If someone has other alloys to suggest me to test I'll be happy to do it. > >I'll be very happy to pass all the samples to a fellow who wish to repeat >the experiment, provide that he/she will post results here and in turn, will >pass everything to the second one who will do the same. > >Best regards, >Andrea Baldoni