He would bring the wax bottle ( had to be more than wax but he always
called it just wax ) out at the beginning of the school year and set it
on the desk and tell us about how nasty it was. I think it was this
talk that kept any of the wanna be bad boys from making off with it.
Yes there was a lock on the door but anyone could have picked it.
Isn't lye what the "cleaner" used in Pulp Fiction? I wonder what the
relative effective times would be..? i.e. how long till everything was
down the drain...
On 4/8/19 12:37 PM, [email protected] wrote:
HF is certainly nothing to mess with, but still they use it in arts and
crafts do etch glass.
If you have ever read the safety material on it, makes you want to never
be with 100' of the stuff.
Is that what Walter White used in the bathtub scene? Funny thing is
that sodium hydroxide (lye) heated up aqueous solution would have done a
much better job. They could have rinsed the guy down the drain.
-----Original Message----- From: Robert
Sent: Monday, April 8, 2019 1:32 PM
To: [email protected]
Subject: Re: [AFMUG] DC/DC converter question
My H.S. chemistry professor, Dr. Welch ( yes that Dr. Welch ) worked for
Standard Oil of California and had the patent with them for putting a
small voltage on the oil pipelines throughout the US. He taught for
the fun of it as his royalty money from that one patent set him up for
life. He was in his 70's in 1970 so he had see some things. He also
kept a vial of hydrofloric acid under his lab sink. When he passed,
they found it there and brought out the bomb squad to remove it.
On 4/8/19 12:17 PM, [email protected] wrote:
-V or what I prefer to say Positive earth ground systems came from two
sources.
My preferred story is that buried and underground telephone cables.
When they get damaged, the positive ground, negative on the telephone
line cause ions in the soil to move toward the telephone line. Thus
plating various metals onto the wire at the spot of the fault. If it
was reversed it would move all the copper from the wire into the soil.
The other story has to do with electric trollies. Same reason, track
corrosion. Not sure which came first. Or really whether either is
true. Chemically the telephone cable story is true.
*From:* Steve Jones
*Sent:* Monday, April 8, 2019 1:08 PM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] DC/DC converter question
I still have a hard time grasping the -/+ thing, im half moron and 50
percent idiot though. But am I correct that -v keeps devices from
corroding as much?
On Mon, Apr 8, 2019 at 1:53 PM Bill Prince <[email protected]> wrote:
+1.
Just had a discussion with someone talking 12V power in RVs, and he
insisted that red was negative and black was "hot". I walked away
from
the discussion before we resorted to fisticuffs.
bp
<part15sbs{at}gmail{dot}com>
On 4/8/2019 10:35 AM, [email protected] wrote:
> Never trust colors.
>
> -----Original Message----- From: Christopher Tyler
> Sent: Monday, April 8, 2019 11:23 AM
> To: AnimalFarm Microwave Users Group
> Subject: Re: [AFMUG] DC/DC converter question
>
> That was what I thought, thank you all for confirming.
> However, with it connected red+/black-, when our tech flipped the
> breaker it blew out the DC/DC converter. In fantastic order, I
was told.
> So I'm going to have them put a voltmeter to the wires and see
what we
> are getting from the power supply, maybe the output wiring is
wrong.
>
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