Re: Creating a folder on the desktop
Re: Creating a folder on the desktop
- Subject: Re: Creating a folder on the desktop
- From: "John C. Welch" <email@hidden>
- Date: Wed, 07 Sep 2005 08:35:40 -0500
- Thread-topic: Creating a folder on the desktop
On 9/7/05 00:48, "Bill Briggs" <email@hidden> wrote:
>> I'm not saying you're wrong. I'm saying that the Navy taught "hole flow", at
>> least in the late 80s, early 90s. Since that's straight from someone who
>> taught basic electronics FOR the navy, I see no reason to think they were
>> lying. He never went into why, just that the navy did things differently.
>
> Careful, you're shooting yourself here. "Holes" are the name given to "the
> absence of an electron", or in other words, a positive charge, and the
> conventional current is precisely the same as that. It's the direction in
> which the positive charges would flow if they weren't bound in the metal's
> crystal lattice. So "hole flow" is in exactly the same direction as the
> current convention. But that's the opposite of the direction in which the
> mobile charge carriers (the electrons, charged negative) happen to flow.
> Electrons flow from negative to positive. Holes, if you wish, move from
> positive to negative. So the navy guy is not wrong, he's just using a jargon
> (holes) that's normally reserved for discussions of semiconductor electronics,
> not current flow. And "holes" aren't really in motion. It's the electrons that
> drift as a consequence of the applied potential.
Dude, I don't care if it's a term that's reserved for the Queen's movement
about Buckingham palace one weekend a month. Here's the exact quote, (Yes, I
DO in fact remember, because he was a rotten old bastard who drove us
mercilessly, and no one had gotten a hundred on one of his block exams in
years. Getting a 98 was a major accomplishment):
"I used to teach electronics for the Navy. They teach hole flow. The Air
Force teaches electron flow. The Navy's backwards on a lot of crap, but then
they call each other seamen, so that's not surprising"
Okay, in tech school, a humorless old bastard making a sex joke, you
remember.
.
>>
>> Again Bill, you're mistaking "This is what they did" with "This is the
>> correct way for every situation". I'm not saying they taught it the best
>> way. I'm saying, and with absolute certainty, that when we traced current
>> through circuits, they taught us to find the damned ground or most grounded
>> point, (airplanes here, so 'ground' and 'earth' are shall we say, sometimes
>> a tad virtual compared to a building)
>
> Ground has many meanings, depending on the context. It's not just "connected
> to the earth".
After almost a decade of aircraft maintenance, yes, I'm well aware of that.
<snip>
Bill, I'm thinking you're missing the point. I don't really care. I'm not
saying that they used the terms correctly, or that they didn't just come up
with something to teach a bunch of kids, over half who had, up until
starting Basic Electronics at Keesler AFB had barely ever HEARD of an
electron.
I'm telling you they said <Foo>. You can tell me that <Foo> is wrong. Not
arguing that. You can tell me WHY <Foo> is wrong. I'll not argue that
either, you know FAR more than I there. In this there is no argument at all.
However, what you cannot tell me is what they did or did not SAY, because
regardless of the fallibility of human memory, I had that goddamned phrase
drilled into me for almost a year. I still remember the damned route between
my Squadron and the hall where BE took place. I still remember that I was on
S shift, which meant I was "on duty" from 6am to 5pm, and our squadron ran
reveille for the student triangle. I was there, you were not. They said it.
You can tell me they were wrong to say it, and I've learned a bit on WHY
they were wrong, but telling me they didn't say it is silly.
--
Just because I have a short attention span doesn't mean I
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