[Elecraft] Terminal resistance

[Nate Bargmann]

* On 2019 16 Jun 22:04 -0500, Bob McGraw K4TAX wrote:
> Yes, lugs can not be soldered alone.  They must be crimped first and THEN
> soldered.    At the same time, some installations of aeronautical equipment,
> along with NASA procedure, I do understand does indicate sweating solder
> into the lug and it thereby wicking up into the stranded wires makes for a
> "stiff" connection.   This connection is reported to break under vibration
> conditions.   I've personally never experienced such with ham equipment,
> although I've never carried any into space.  I suppose there is merit to
> this directive.    Perhaps you FAA and NASA types can expand this thought.

I've noted this before.  Before our shop started using crimp UHF
connectors--RF Industries brand of connectors and crimper--we had a high
failure rate of the kludge that is the PL-259 with the UG-174 adapter
and blobs of solder (some installed by us, most from elsewhere).  In
various track machines, trucks, and other railroad equipment I never
replaced a properly installed crimp connector.  I did replace a number
that came from the truck outfitters but those would arrive with a short
or without the center pin making contact with the coax center conductor,
but that is another story.

Yes, annealing of the wire when using solder is a no-go where flexing
may occur.

73, Nate, N0NB

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