"Spanner Dangle" wrote in message
...
On Fri, 5 Sep 2003 00:54:14 +0200, "All Ears"
wrote:

Actually tin or/and lead are not terrible good conductors, crimping or
wire
wrap will produce a better electrical connection.

I would assume that, in a signal path with many solderings, there
probably
would be some effect of using less conductive materials as conductors.

Funny enough, if the two copper parts are close enough when soldered, it
will produce a mechanical connection, stronger than the solder and the
copper. If the connection is torn apart with force, it is possible to see
there has been some sort of reaction between the tin/lead and copper, a
third alloy?

Karsten


Going back to my college days I was taught that electrical current
travelled on the outside of a conductor. I assume that in multi strand
cables the current travels along the outside of each strand
(conductor). Exactly how I don't know as thay all touch each other.

So I have always assumed that if you solder a multi strand cable then
at that point the strands are physically bonded and hence you would
get a higher resistance.

Thats my undeerstanding anyway. I'm probably well out of date though.
College was many years ago!



A function of frequency though. Its called skin effect and if I also
remember my college theory correctly its caused by the self-inductance of
the conductor which causes an increase in the inductive reactance with
increasing frequencies thus making electrons move towards the surface.
I'm sure someone will correct me if I've got it wrong ;-)
Mike