you are correct that a properly crimped connection is as good as
soldering but that really wasn't the point and I'm not sure why I even
mentioned soldering perhaps because I know that some do. I just crimp
as its way faster less burns and swearing and works fine for me.
The biggest downfall of soldering APP is that the solder and flux can
run down the pin where contact is made defeating the silver plating
creating problems.
However, whether you crimp or not, with light gauge wires like that
the power cable for an HT or small accessory, a strain relief will help
prevent wires from breaking off right at the end of the connector due to
fatigue. Frequent connecting and reconnecting plus moving equipment
while connected will break the wire right where it comes out of the
crimped connector pin. (I'm not talking about the wires pulling out).
A strain relief will reduce the radius of the bend in the wire at the
connection when it is moved around I don't see how crimping the
connector alone will prevent a wire bending and eventually breaking off
from fatigue
As for Mercedes Way back I was a Mechanic at a Mercedes dealer and I
know for sure that Mercedes Benz soldered plenty including pins for the
connectors. I'm sure that is changed in the last 3 decades due to
manufacturing cost.
David Moes
[email protected]
VE3DVY
On 5/2/2013 21:42, EricJ wrote:
{Directed at no one in particular. Don't take it personally, anyone}
I think someone already mentioned doubling the stripped wire back over
the insulation, then putting that in the APP terminal. I'm pretty sure
that's what Anderson recommends. But then you have to PROPERLY crimp
it, not solder it. Do that and you won't need strain relief in
ordinary service.
So treat yourself. West Mountain has an EXCELLENT crimper good for all
three APP terminals, and as quality crimpers go, it's dirt
cheap...$40...the price of two large pizzas. Anderson has one too, but
you need a credit check to buy it. I've done hundreds of crimps with
the West Mtn crimper for ham, auto and R/C use. Soldering APPs is
ridiculous and produces an inferior connection that NEEDS strain
relief. You select a stranded wire, then wick solder up it to make it
a solid wire. That's nuts.
I've heard from lots of R/C people that crimping makes an inferior
connection and the connection should be soldered as well. Tell that to
Mercedes or any quality auto or motorcycle manufacturer. Except for PC
boards, just try to find a soldered joint in an automobile of any
quality. You won't.
Everything is crimped. I don't know for sure, but I'd bet all aircraft
connectors are crimped. I bet the SR-71 connectors are all crimped.
Probably the Shuttle too. Shouldn't that be good enough for a 12 volt
ham rig?
Crimping isn't inferior. Crimping with crap tools is inferior.
Well, that feels better.
Eric
KE6US
K1, KX1, K2
On 5/2/2013 4:44 PM, david Moes wrote:
For the fine wires, before crimping I slide a short length about
half to 3/4 inch length of shrink tubing with a diameter just big
enough to fit over the crimped end on each lead then I slide
another piece of shrink tubing over both wires about 2 inches long
and slide it out of the way for now. once the crimp and
soldering is done I slide the short tubing so that it is just
covering the crimp then shrink it then I slide the terminals into
the connector body and join the two together and line them up.
Then I slide the longer shrink that covers both wires as close to the
APPs as I can and shrink it. It makes a tidy strain relief As a
side note I never use the pins to hold the connector pairs together I
find that they can still come apart Crazy glue does a much
better and more permanent job.
73 Dave VE3DVY
. On 4/24/2013 17:20, ab2tc wrote:
Hi all,
I have recently converted more or less completely to Anderson Power
Poles
for all my power supply needs. I use an 8-way "hub" from Powerwerx
as my
"distribution center". No fuses as the switching power supplies are
current
limited and probably failsafe in the event of most electrical component
failures. For the big stuff, radios with #12 power wires I am not
worried
about the lack of strain relief on the connectors. But for the
flimsy power
cables supplied with accessories like my KAT500, LP-100A, Lantronix
serial
servers I am. Has anybody found a good solution for this? Should I
just fill
the back of the connectors with epoxy or is there a better way?
Knut - AB2TC
--
View this message in context:
http://elecraft.365791.n2.nabble.com/OT-APP-strain-relief-tp7573006.html
Sent from the Elecraft mailing list archive at Nabble.com.
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