[TR] Wire terminations

[Randall]

> I used to like to pre-tin crimped connections, but have since 
> learned it is not really a good idea.  The problem is that 
> solder can "cold flow".  The solder will actuall move away 
> from the crimp and cause the joint to loosen over time.  
> Crimping, done properly is good.  Solder is also good, but I 
> would not recommend both.

FWIW, that's part of the sequence I gave (and use).  Do the crimp first,
then only solder the tip of the wire where it sticks out on the other side.
You don't want to use so much heat that the solder wicks all the way through
the crimp joint.  This also ducks the problem where the surface of the
solder forms a stress riser that will concentrate any vibration and cause
the wire strands to break.

> The ysay never rely on solder as the electrical connection. It's only
meant to retain the mechanical connection
> of the electrical contact. point.

I was taught exactly the opposite: solder is an electrical joint not a
mechanical joint.

-- Randall