REFLECTOR: Electrical Connections?

[doug.holub at tx.rr.com]

Kevin,

I second what Sid said. The wire tends to break at the end of the solder, which is the main reason I use crimped connections whenever I can.  

Doug Holub
hooking up the avionics

---- Sid Knox <sbjknox at earthlink.net> wrote: 
> From: "Kevin Baker" <flykb at verizon.net>
> Subject: spam: REFLECTOR: Electrical Connections?
> 
> 
> > Hi All,
> > Quick question..
> > I've heard the following from both camps and wanted to know what you
> > guys thought.
> >
> > 1) Crimp electrical connections - Some say the only way and others
> > say it will corrode and cause issues and soldering is better.
> >
> > 2) Solder electrical connections - Some say this is better, but
> > others say the acids will breakdown the connection over time and the
> > connections will deteriorate.
> >
> > ??
> >
> > What do you guys think?
> >
> > Thanks,
> > Kevin Baker
> 
> Crimp connections can be "forever" if done with the proper tool and proper 
> technique to achieve a "gas tight" connection.
> But for a vibrating environment like an airplane, I prefer to crimp for 
> mechanical strength and then solder for electrical properties.
> Quality rosin-core solder has no corosive flux.
> One potential problem with soldering the crimped wire is that where the 
> solder stops (at the end of the connector) and the wire continues, there is 
> an abrupt mechanical mis-match from solid soldered wire to flexable wire. 
> This point is a stress-riser and if the wire is subject to movement from 
> vibration or flexing, it will fail (break) in time.  The cure for this is 
> either to clamp or tie the wire so it can't move or to use a short piece of 
> heat-shrink tubing over the end of the connector.  This tubing provides at 
> least three positives:
> 1)  defuses the stress riser by spreading the flex region.
> 2)  if clear tubing is used, you can include a wire id tag under the shrink.
> 3)  provides a visual "professional" look.
> 
> $0.02
> 
> Sid Knox
> Oklahoma
> 
> Velocity  173 RG  N199RS
> Starduster  N666SK
> KR2         N24TC
> W7QJQ
> 
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