Re: [LAD] A little quiz about audio measurements...

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To: <linux-audio-dev@...>
Date: Friday, May 28, 2010 - 11:56 pm

On Friday 28 May 2010, fons@kokkinizita.net wrote:

I beg to differ a bit. But this is also OT, sorry.

I can recall an instance while I was C.E.ing at KIVA-tv in Farminfton NM, in
the later 70's that was certainly odd to say the least. We had come off the
network into kiddie hour in the afternoon, with my operator on duty fussing
because the network ran over, way over, only to discover that no tv made
could sync to the video coming out of our Sony 2800, 3/4" U-Matic vcr's, and
moving the tape to another machine made no diff.

Since our power was from the W.A.P.A. grid, which is most of the US west of
the river, I glanced at the wall clock, which was then still a wall powered
synch motor clock, and found it was about 13 minutes ahead of my watch, an
early digital one.

So I called the local power company who had no clue what it was that I was
talking about, so they gave me another number to call. Shortening the
story here, 3 numbers & 15 minutes later I am talking to the engineer in
charge in the W.A.P.A. control room (I think in Bonneville Utah), and when I
said they were running fast, he laughed, so I asked him what time it was,
and got a quote that matched our wall clock to a second or so. I said, no,
its not, its such and such a time right now, and the whole grid is running
at what my counter says is 71HZ, I had by that time measured it. So he
walked over to his vibrating reed meter and of course it was so far off it
was silent. He came back to the phone and asked if I could hear anything,
at which point I could hear the air conditioner blowers almost coasting back
down to their usual speed, and it was back to about 59.6 HZ, which my vcr's
with their synch motors and eddy current brakes which made the belts slip
ever so slightly so that the drum speed was once again 1800 rpms (actually
1,798.2 rpms, NTSC of course), and we were back on the air. The wall clock
was finally right again about 22:00 that night.

The point being that he had the controls that allowed the whole grid west of
the river (Miss. River) to be dropped about 11 hertz in slightly over a
minute. And that is an area larger than Europe I believe.

Pull that today and they would probably send the black helicopters to check
your bodies DNA. After the fact.

Yup, broadcast engineering can be a "but that can't happen (but it just
did)" scenario at least once a week. I stuck around for 45 years just to
see what happened next. And it was quite a ride. ;-)

Now, back to your regularly scheduled puzzles. Your turn again Fons. ;-)

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
I still miss Windows, but my aim is getting better.
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Messages in current thread:
Re: [LAD] A little quiz about audio measurements..., Niels Mayer, (Fri May 28, 3:31 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:00 pm)
Re: [LAD] A little quiz about audio measurements..., Karsten Wiese, (Sun May 30, 2:06 pm)
Re: [LAD] A little quiz about audio measurements..., Karsten Wiese, (Sun May 30, 4:08 pm)
Re: [LAD] A little quiz about audio measurements..., Niels Mayer, (Fri May 28, 6:27 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:39 pm)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 7:14 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:17 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 9:24 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 10:33 pm)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Sat May 29, 1:59 am)
Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Fri May 28, 11:56 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sat May 29, 6:30 am)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Sat May 29, 6:42 am)
Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Sat May 29, 3:58 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sat May 29, 7:14 am)
Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Sat May 29, 4:19 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Sun May 30, 5:29 am)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sun May 30, 11:05 am)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Sun May 30, 12:29 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sun May 30, 12:35 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 10:42 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:30 pm)
Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 5:40 pm)
Re: [LAD] A little quiz about audio measurements..., James Morris, (Fri May 28, 6:28 pm)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 6:15 pm)
Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:23 pm)
Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:40 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 7:12 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:50 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:52 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:26 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:22 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 5:58 pm)
Re: [LAD] A little quiz about audio measurements..., Gabriel Beddingfield, (Fri May 28, 5:50 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:57 pm)
Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:08 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:18 pm)
Re: [LAD] A little quiz about audio measurements..., Arnold Krille, (Fri May 28, 5:24 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 4:33 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 4:39 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 3:24 pm)
Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:05 pm)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 5:00 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:21 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:37 pm)
Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:39 pm)
Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 6:55 pm)
Re: [LAD] A little quiz about audio measurements..., Ricardus Vincente, (Fri May 28, 7:15 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:20 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:07 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:14 pm)
Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 5:22 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 8:52 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 9:34 pm)
Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 10:31 pm)
Re: [LAD] A little quiz about audio measurements..., Florian Faber, (Fri May 28, 4:54 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:04 pm)
Re: [LAD] A little quiz about audio measurements..., Chris Cannam, (Fri May 28, 2:53 pm)
Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 3:05 pm)
Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:27 pm)
Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Fri May 28, 2:37 pm)
Re: [LAD] A little quiz about audio measurements..., Florian Faber, (Fri May 28, 1:35 pm)