"Volker Tonn" wrote in message
...


Rob Mills schrieb:


Do you promise that you won't use the same soldering that you use for
plumbing. : )

Not the same soldering as for plumbing? What else?
Just curious ;-)

Volker


Here, in the US, copper pipe is soldered together. The plumbing solder used
to be something like 50-50 tin/lead with an acid flux core. Kit
manufacturers, such as Heathkit, would warn the kit builders not to use any
acid core solder. They clearly explained that the acid flux would leave a
corrosive residue which would damage the electronics. The guarantee was
void on any kit assembled with acid flux solder. The warnings were so
prominent that I'm sure kit builders will remember them long after they have
forgotten the resistor color code.

Lead based plumbing solder is now banned in the US. The new plumbing solder
has bismuth or something in it. The acid flux core is still there.

Frank Dresser