On 10/4/19 12:17 PM, MLewis wrote:
With audio signals, a soldered crimp is one of the worst possible
connections. I wouldn't think it would be different for anything else,
but may go undetected until failure. If you've used the correct size of
crimp and used a proper crimping tool, then you've got the proper
pressure for a solid reliable connection. If you then solder, the heat
expands the crimp lessening the crimp pressure, and when it cools it's
no longer at the correct crimp pressure (often the wire will pull right
out), and with iffy wicking of solder. The worst of both methods
combined in one.
Where the wire is too thin for the crimp I have available, I've cut a
piece of a correct thickness wire/cable, inserted that into the crimp
along with the signal wire/cable, so it's crimped between them. I don't
know if that is the best way of handling that, but it's worked for me.
I agree on not soldering - soldering makes for a stress concentration at
the end of the strands. With a crimped connector, wiggling the wire
bends all the strands differently. And the solder does change the
"springyness" of the crimping.
With the right crimp tool, and the willingness to throw away marginal
crimps.
If you were to pot the wire into the connector, that would probably
solve the brittle solder problem. But that's yet another assembly step
to squirt the epoxy in.
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