[Elecraft] This information could save your life.

Sat Nov 9 17:05:00 2002

Hi

The general tool is a bit expensive for this use ($20) but there are cheaper
versions made in Taiwan or China that only cost $2 or $3 that would be fine
for this emergency use. Put one in the glove box on on your keychain.

The orginal Question that started this thread was about how do you cut a run
on a 6 layer board. Well there are several methods but the one I used is:

First you need a good print of the artwork then you need to find a place
where the run does not have any other runs above or below it. Then using a
drill press carefully drill through the board cutting the run. Then fill the
hole with epoxy. Once the run is cut run a wirewrap wire to the pads that
need to be connected on either the top or bottom of the board. We would use
a tiny bit of epoxy to hold the wire to the board in one or two places. I
now use tiny dabs hot melt glue to hold the wire in place as it is easier to
work with.

Don Brown
KD5NDB

----- Original Message -----
From: <[email protected]>
To: "Jeremiah J McCarthy" <[email protected]>
Cc: <[email protected]>
Sent: Saturday, November 09, 2002 3:21 PM
Subject: [Elecraft] This information could save your life.

>
> I don't know that I would want to use a center punch on a PCB but, some
> folks may.
>
> Now, on to the actual meat of the message.  If you do not already own one
> of these devices, you should purchase one to put on your keychain(s).
> Why?  They will allow rapid escape from your vehicle if you ever find
> yourself in the unenviable position of being in said vehicle while it is
> submerged in water.  You may say, "That will never happen to me."  Well,
> so did I.  The fact of the matter is that the ability to think calmly
> under pressure, and adapt, improvise and overcome (things that the Marine
> Corps taught me) led me to use the center punch to escape the vehicle.
> The windows (power) would not roll down and the doors would (for obvious
> reasons) not open.  The center punch took out the drivers side window in
> one quick "pop".  Note: If you have to do this, take a deep breath, face
> AWAY from the window, reach behind yourself and use the punch.  Wait until
> the vehicle is FILLED with water (which will now enter rapidly through the
> window) before you attempt to exit.  I don't care how strong of a swimmer
> you are, you aren't stronger than the water that will be rushing in the
> window.
>
> Simply hold the spring loaded punch against the center of the window,
> push, wait a few seconds, unbelt and swim to safety.
>
> For the price, it is very inexpensive insurance that if you find yourself
> in that position, you can exit your vehicle.  It is also goo for entering
> vehicles that are locked should you be a first responder.  You probably
> already know the value of a center punch if you are though.
>
> 73 de John - KC4KGU
>
>
> On Sat, 9 Nov 2002, Jeremiah J McCarthy wrote:
>
> > General Hardware Manufacturing sells a very handy device they call an
> > automatic center punch...It is a spring loaded self impacting center
> > punch with adjustable impact from heavy to light...One simply places the
> > point of the punch at the spot where the mark is desired and push down
on
> > the barrel...The tool will "snap", unloading the internal spring loaded
> > hammer, leaving a dimple...No hammer is needed and the dimple will be
> > exactly where you want it...
> >
> > Jerry, wa2dkg
> > K2 #2549
> >
> >
> > K2VCO asked:
> >
> > >OK, I'll bite.  HOW do you cut a trace in the middle of an eight-layer
> > PCB in
> > >any province ("very carefully" is not an acceptable answer)?
> >
> > Dremel tool & (sorry, must use the word) careful measurement when
marking
> > the point to be drilled & how far to let the bit to go in.
> >
> > 73, VR2BrettGraham
> >
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