RE: solder vs crimp Re: MOT supply construction question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jim-at-jlproduction-dot-com>

When we fix battery chargers at work we have to crimp THEN solder all of
the leads. Heavy amperage for sure in a automotive charger, but still
not all that time consuming to do.

Jim L 

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com] 
Sent: Sunday, October 13, 2002 2:25 PM
To: tesla-at-pupman-dot-com
Subject: Re: solder vs crimp Re: MOT supply construction question

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>

> I have seen this debate  before, but it seems as if the

> discussion centers on solder VS crimping.  What are the

> drawbacks of crimping AND soldering?

	Excess time and effort spent.
	Not a big deal if its personal time only.

	Also, its useful to understand that 'well made'
	crimp is quite good, by itself, arguably better than
	may solder joints.  (tho, as noted, a 'properly made'
	crimp is a lot easier in a production environment.

> I have seen solder only connections "eject" the wire,

	There should, probably, never be 'solder only'
	connections:  MUST be twisted (screwed, whatever)
	first to provide structural strength.
	And, how GOOD were the solder joints?  (I learnt to
	make solder joints at a young age & have seen
	some remarkably bad ones since....)

> I have seen many crimp connectors "lose" the wire,

	If well made, they won't.  Most people haven't the
	tooling to make them well.

> but I have never seen a crimp and solder joint fail for any

> reason other than extreme mechanical damage or heat, which
> would have ruined things regardless of the nature of their

>connection.
 
> Anyway, is there a failure mode that occurs only (or more often)

> when soldered and crimped?
	Thermal damage to insulation.

	corrosion from wrong flux.

	(those are generic to soldering....) 

	best
	dwp
	(Electrical engineer...)

...the net of a million lies...
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	-me