[aprssig] 12V wiring ideas
curt.we7u at gmail.com
Sat Oct 29 18:47:17 CDT 2011
On Sat, 29 Oct 2011, Curt, WE7U wrote:
> On Sat, 29 Oct 2011, Bob Bruninga wrote:
>>> I have seen PP's come apart many times with
>>> no tension on the wires. So I know its possible.
>> Sure if the PP is not assembled right in the first place. Anything not
>> properly installed cannot be expected to work right.
>> If the PP contact is properly slid all the way in to where it hooks over
>> the steel spring clip, then (and only then) will it be in the correct
>> position and will properly do its job. Sometimes people do not do that
>> last little click and forget to look carefully to assure it is seated.
>> I use them all the time, and they never come apart.
> Those that solder them (I used to) can also get rosin on the contact surface
> and/or get solder up onto the contact surface. You can also end up not
> having them seat properly or seat at an angle after soldering.
> Now that I use the cheap crimp tool (recommended on some web sites as doing
> correct crimps) I've not had any trouble with them.
> The military uses crimps instead of soldering to get more reliable
> connections. If it's good enough for them, it's probably good enough for my
> BTW: Forgetting to fuse the ground lead at the battery is a _very_ poor
> idea. Years ago I did my own radio installs that way. You can burn up the
> ground wire, or burn the insulation off it if the car has a bad return for
> the starter motor. I had that happen twice during high school. The first
> time the wire heated up during starting and burned all the insulation off,
> then the wire burned in two. The 2nd time (different car) the wire melted
> its way into another wire bundle causing a lot of $$ in damage that had to be
> repaired. Didn't start a car fire in either case but easily could have.
> Each time it happened was while starting the car.
I should have mentioned: Each of these were each radio installations with a very short ground wire going directly to a tie point on the metal dashboard. The only fuse was in the hot lead, going to the fuse block inside the passenger compartment under the dash.
Curt, WE7U. http://www.eskimo.com/~archer
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