Make that Scotch #33+ pelase....

Negative
Scotchfil insulation putty, followed by Scotch 88+ (as opposed to 33+)
scotch 88 is weatherproof.
Then a little Scotchkote insulating varnish.
Then take it all to a motor repair shop and send it through the VPI process.

no to welding
no to loctite and RTV

Hal Rosser wrote:
Make that Scotch #33+ pelase....


Negative
Scotchfil insulation putty, followed by Scotch 88+ (as opposed to 33+)
scotch 88 is weatherproof.
Then a little Scotchkote insulating varnish.
Then take it all to a motor repair shop and send it through the VPI process.

no to welding
no to loctite and RTV



So anyhow, why are crimps inferior to soldering?

- 73 de Mike KB3EIA -

alex wrote:
Crimp is also very common in aerospace
and military.

And probably for a reason! ;^)

- 73 de Mike KB3EIA -

Chris W wrote:
I am new in ham radio and want to get set up to make the coax assemblies
I will inevitably be needing in the future. I am planing on using only
LMR style coax 240, 400, 600 and maybe some 900 if I get into the 1.2ghz
stuff. So is it better to use the crimp, clamp or solder on
connectors. In the case of the center conductor, there are some where
that is solder and the outer is crimp or clamp so is crimp and or clamp
ok for the outer conductor and solder better for the inner? I welcome
all points of view on this. Thanks for you input.


USA DOD and NASA [DOD STD 454 et al] specifications insist that both a
secure and stable mechanical connection, crimp or clamp, be used for
strength, temperature and fatigue stability; and, that solder or weld be
used, occassion appropriate, for electrical connectivity.

In the typical amateur usage that would include a strain relief [crimp
or clamp] for those connections where a mechanical stress [bend or
weight] and solder.

So anyhow, why are crimps inferior to soldering?

- 73 de Mike KB3EIA -

crimps can 'work loose'
Same reason you have 5 lug nuts on your wheel instead of 2 or 3.

ORIGINAL MESSAGE:

On Mon, 26 Dec 2005 23:04:44 -0500, "Hal Rosser"
wrote:

crimps can 'work loose'
Same reason you have 5 lug nuts on your wheel instead of 2 or 3.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Nonsense.

Properly crimped, the wire will break before the crimp "works loose".

Your tire has multiple lug nuts to spread the stress, not because a
smaller number will "work loose".

73, Bill W6WRT

Hal Rosser wrote:
So anyhow, why are crimps inferior to soldering?

- 73 de Mike KB3EIA -


crimps can 'work loose'
Same reason you have 5 lug nuts on your wheel instead of 2 or 3.



Why are crimp connections used by some of the outfits who have a
critical interest in the catastrophic effects of a failure?

- 73 de Mike KB3EIA -

"Bill Turner" wrote in message
...
Nonsense.

Properly crimped, the wire will break before the crimp "works loose".

Your tire has multiple lug nuts to spread the stress, not because a
smaller number will "work loose".

73, Bill W6WRT

Guess that's right, let's see now. Formula ! car wheels just have one big
lug nut, don't they?

Harold
KD5SAK

kd5sak wrote:
"Bill Turner" wrote in message
...

Nonsense.

Properly crimped, the wire will break before the crimp "works loose".

Your tire has multiple lug nuts to spread the stress, not because a
smaller number will "work loose".

73, Bill W6WRT


Guess that's right, let's see now. Formula ! car wheels just have one big
lug nut, don't they?

Yes, and six drive pegs
http://www.f1-country.com/f1-enginee.../wheelrim.html

so the nut only holds the wheel to the hub and doesn't take the stresses
of propelling the car.

W8LNA

"W8LNA" wrote in message
...
kd5sak wrote:
"Bill Turner" wrote in message
...

Nonsense.

Properly crimped, the wire will break before the crimp "works loose".

Your tire has multiple lug nuts to spread the stress, not because a
smaller number will "work loose".

73, Bill W6WRT


Guess that's right, let's see now. Formula ! car wheels just have one
big
lug nut, don't they?

Yes, and six drive pegs
http://www.f1-country.com/f1-enginee.../wheelrim.html

so the nut only holds the wheel to the hub and doesn't take the stresses
of propelling the car.
W8LNA

On street wheels the nuts do support torque, but not like a single central
one would (like the formula 1 without the pegs). The holes in the wheel are
tapered, the nut seats on the taper and the lug shaft (threaded lug) does
not contact the wheel hole. The torque is transferred by radial forces on
the nuts. (pardon any unintended pun)
73, Steve, K9DCI