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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