Robert A. Alexander wrote:
>
> Volks, I've been "soldering" stuff for the past 37 years.  Probably the
> best advice I received from my mentor was that mechanical connections =
> crimping, twisting, hooking AND electrical connections = lots of
> mechanical contact and/or soldering!  One should not depend upon a
> soldered connection for mechanical connection, although, in printed
> circuit board construction, one has to.
>
> If one has experienced a "brittle" nature to their soldered connection,
> one has experienced a "cold" solder joint.
>
> "Flux" is NEVER necessary in typical electrical wiring soldering!!!
> Rosin is NOT "corrosive", in any way!  I have some home-brew & radio
> kits I built back in the 60's and later and I defy anyone to find any
> evidence of any rosin-induced "corrosion" in any of these pieces of
> equipment!  In fact, me grandmother's '37 Philco AM-SW radio still works
> fine and, virtually, everything in it is "soldered" together.
>
A radio presents a completely different environment to a motor vehicle.
There is no vibration in a radio and little temperature variation.