Re: HP calibration resistor out of spec

On 29 Apr 2006 22:06:43 GMT, Jim Yanik <jyanik@xxxxxxxxx> Gave us:

"Michael A. Terrell" <mike.terrell@xxxxxxxxxxxxx> wrote in
news:4453C285.8B5E984@xxxxxxxxxxxxx:

Joerg wrote:

Hello Michael,


I wonder if the trick would also work with the California sun. See,
yours appears over the ocean but ours disappears over the ocean.
But I don't want to hose off HP equipment ;-)

Repairing this 4191 is a pain (mostly on my lower back). Today I
have the "pleasure" to take apart one of the samplers because
that's where things look iffy. And I don't have an 18GHz scope as
they recommend. Time to improvise.

I removed the case or covers before cleaning them. It also
worked on
some old Burroughs minicomputer cabinets on wheels that I cleaned
up to use as tool cabinets.


A friend in Europe did the unimaginable: He bought an old commercial
grade communications receiver for a song at some flea market. It
worked but was outright filthy. He put the whole thing in the
dishwasher (!) and it came out almost like knew, not counting the
scratches it already had. He let it dry out really good and it still
worked.

Now I would never do that.

Regards, Joerg

http://www.analogconsultants.com


Microdyne ran completed PC boards through a commercial board
cleaner
that was nothing more than a modified stainless steel dishwasher.
They built telemetry equipment.



Dishwasher 'soap' is a very aggressive cleaner,especially on organics.
It needs a thorough rinsing,though.

Water is a very aggressive cleaner, it just needs a SOAP to reduce
the surface tension enough that it can undermine dirt, such as
organics.

It is the WATER that does the job. The soap merely allows it to get
to places it would not normally be possible for it to get. It softens
the water, but the water is still the true workhorse. Especially hot.
.

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