George,
Solid wire will eventually break if it is flexed - and it will break
right where the terminals are attached.
Stranded wire that is soldered will also break - right where the end of
the solder that wicked up the wire stops.
The best is stranded wire with crimped connections made with a proper
crimping tool. Done properly, that should result in an air-tight
connection that should not oxidize.
In order to do that, you must use a crimping tool that is sized for the
wire and terminal that you are using. Crimping with just any tool will
"not get it".
If you do not have the proper crimping tool, soldering is OK, but
support the wire for about 2 inches away from the soldered terminal so
there is no chance that it can flex.
73,
Don W3FPR
On 6/16/2019 7:22 PM, Kidder, George wrote:
Interesting data, Don. I wonder if there is any information about
resistance variations between soldered and crimped terminals. One might
think that, with stranded wire, even a good crimp connection might not
solidly involve all of the strands, and might additionally deteriorate
with time since oxygen could get between the strands. A good solder job
should wet the wire through and (additionally) exclude oxygen. This
wouldn't be easy to measure, for sure, but these engineers are cleaver
people!
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