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RG-58 compared to RG-174

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March 28th 04, 08:33 PM

Richard Clark

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On Sun, 28 Mar 2004 18:55:40 -0000, (Dave Platt)
wrote:

copper does suffer from
work hardening after cold-deformation.

For an HT application?

The extent depends on the
purity of the copper

Generally 99.95% or better for simple wire. Copper pipe is another
matter, but for an HT application?

and on what other metals it has been alloyed
with. [Lead is apparently one of the few metals not subject to work
hardening.]

And the lead amalgam (with tin) is the MOST likely to be found - for
an HT application.

Work hardening would require a severe kink, about the same radius of
the wire. The insulation is going to limit that bend to easily ten
times that, and typical practice to 100's of times that. And as for
repetitive (the work part of the hardening) stress, maybe for an
automatic door opener, but for an HT application? The topic
application is for jumper connections where the SMA connector is far
more likely to fail.

C'mon, now guys, let's worry about what is likely to break, not about
everything that might fail. May as well take out an
asteroid-collision policy.

73's
Richard Clark, KB7QHC

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