Date: Wed, 10 Jan 2018 15:19:28 -0800
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: Multi Conductor Shielded Automotive Wire Temperature Rating
In-Reply-To: <CAB2RwfiyvQmyCUFmMgg3FCYDbB9t+jf=CdzwOLeWX9PkoEHb1Q@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
why not just go get a "new" one, or visit any junkyard for one? They all
seem the same through the years on the ABA and Jetta line. They are
simple microphones that hear a knock by being bolted to the motor...that
signals the timing to stop the knock...The ones I've seen all use the
generic VW plugs on the other end... like the Temp II plugs... Rock Auto..
probably even NAPA...I don't think they are specific... could be wrong...
but one on my inline got cracked, I installed another...works fine.
.
On Jan 10, 2018 2:56 PM, "Neil N" <musomuso@gmail.com> wrote:
> Ok. Thanks or the link to MIT. I will read the handout. Bill Whitlocks bio
> speaks volumes to me as a pro musician who also dabbled in sound recording.
> (but spent most of my time on the other side of the glass. ;) )
>
> Steve: I did note your comment on loops and sensor ground location. Thanks.
>
> Ed: good to know of a front to back wiring solution. (oil light etc.) I've
> also heard that 3 conductor extension cord can work just fine for that
> application. I know from experience how much more time it takes to fish
> single wires either already installed in loom or added later on, to the
> loom.
>
> Neil.
>
>
>
> On Wed, Jan 10, 2018 at 2:39 PM, David Beierl <dbeierl@attglobal.net>
> wrote:
>
> Changing the length of a ground wire isn't likely to make much difference
> > unless it's carrying noticeable current, in which case if you double the
> > length as a rule of thumb you should go down three AWG numbers (or
> double
> > the number if you're using mm^2 wire).
> >
> > Changing the *location* of a ground won't generally be an issue for power
> > wiring but could be for signal wiring. Generally speaking "ground"
> > currents in the chassis will follow the shortest straight path to the
> > battery ground cable. Running grounds belonging to one system to
> multiple
> > places can introduce a problem called a ground loop. In an extreme case
> I
> > have seen a printer cable melt because the printer was plugged into a
> > different circuit than the computer (they were six feet apart on a
> factory
> > floor, but different circuits).
> >
> > All wire/grounding considerations become more stringent or difficult as
> > you move away from DC. The higher the frequency the worse the problem.
> >
> > http://web.mit.edu/jhawk/tmp/p/EST016_Ground_Loops_handout.pdf
> >
> > Yrs,
> > d
> >
> >
> >>
> >>
> >
>
>
> --
> Neil n
>
> Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
>
> 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
>
> 1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>
>
> Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
>
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