The 555 Has Been Around at Least 30 Years

[Ken Taylor]

"Roy J. Tellason" <rtellason@DONTSPAM MEblazenet.net> wrote in message
news:vqlb5ciq6bvqb9@corp.supernews.com...

Ken Taylor wrote:

I had a similar problem with 1488/89's in equipment at an air force
base,
continually losing them to lightning and surges. Right up until I
cleaned up
the building earthing and tidied the equipment's comm's wiring (again,
particularly the earths).........

Ken

I used to get these terminals in all the time, with exactly that problem
and
for exactly that reason. Thse chips weren't socketed in the original
manufacture, but I installed sockets to make replacement easier on
subsequent visits.

I never did get out to the site, but know that it involved a cable run
from
one building to another at a local small airport.

Care to elaborate on what you did to fix the problem?

Had two problems - one rack was missing it's frame earth, so the frame was

actually at half-supply (found that one when it bit me!). The frames were
earthed from one to the next, so replaced that with earthing going back to a
common power earth at the supply entry. Did the same with the comm's into
the box - any earths from outside the equipment were isolated from the
chassis and only bound to the chassis at *one* point. This was for all the
coaxes and also the RS-232 cables. The power earth was tied to the same
point, and we deliberately didn't use one of those IEC connectors with the
in-built RFI filtering - we replaced that with an in-line version that we
had a bit more control over, earth-wise. Problem went away after all this,
but we should have designed it all in from the start - it's a lot easier
than a redesign! We just didn't realise the magnitude of the problem until
we started putting kit out into the field..

Cheers.

Ken

 

[Michael A. Terrell]

Fred Abse wrote:

On Wed, 05 Nov 2003 18:35:40 -0800, Watson A. Name - "Watt Sun, Dark
Remover" wrote:

In article <pan.2003.11.03.22.09.58.626529@cerebrumconfus.it>,
excretatauris@cerebrumconfus.it mentioned...
On Sun, 02 Nov 2003 23:55:13 +0100, Reinhard Zwirner wrote:

What about the big Sequoia trees? IIRC they need wildfires for
propagation ...

Not sure about that, I do know that they can *survive* fires.

They have so much tannic acid in the bark that after they die, they
won't even rot away.

They sure as hell can fall over, though. ISTR, sometime recently that a
family sightseeing in Sequoia NP heard a crash, thought nothing more about
it, but when they got back to where they'd left their SUV - well, you can
guess the rest!

TREE = 1
SUV = 0 ;-)
--


Michael A. Terrell
Central Florida

 

[JRW]

Watson A.Name - Watt Sun, Dark Remover wrote:

I wish the hell you'd cut out the nonsense. The trees are DEAD!

Wasn't that a quote from Mister Roberts" I don't think it was the
movie, but TV show. They bring a blond bimbo on board and tell the
captain she's a tree expert, she looks at his dying palm tree and
says, "I think it dead..." One of those quotes you never forget...

 

[Jim Thompson]

On Sat, 08 Nov 2003 20:20:56 GMT, JRW <no_addy@no_.com> wrote:

Watson A.Name - Watt Sun, Dark Remover wrote:

I wish the hell you'd cut out the nonsense. The trees are DEAD!

Wasn't that a quote from Mister Roberts" I don't think it was the
movie, but TV show. They bring a blond bimbo on board and tell the
captain she's a tree expert, she looks at his dying palm tree and
says, "I think it dead..." One of those quotes you never forget...

One of my all-time favorite movies. Bought a copy on DVD.

I always identified with the character Ensign Pulver (played by Jack
Lemmon).

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Fred Abse]

On Thu, 06 Nov 2003 22:29:51 +0000, Michael A. Terrell wrote:

Fred Abse wrote:

They sure as hell can fall over, though. ISTR, sometime recently that a
family sightseeing in Sequoia NP heard a crash, thought nothing more about
it, but when they got back to where they'd left their SUV - well, you can
guess the rest!


TREE = 1
SUV = 0 ;-)

Now that I remember, the two guys on "Car Talk" spent the next five
minutes discussing whether the insurance company would call it an "Act of
God", and refuse to pay out.

--
Then there's duct tape ...
(Garrison Keillor)
nofr@sbhevre.pbzchyvax.pb.hx

 

[Watson A.Name - "Watt Sun]

In article <Iecrb.2212$Ai1.982559868@newssvr30.news.prodigy.com>,
no_addy@no_.com mentioned...

Watson A.Name - Watt Sun, Dark Remover wrote:

I wish the hell you'd cut out the nonsense. The trees are DEAD!

Wasn't that a quote from Mister Roberts" I don't think it was the
movie, but TV show. They bring a blond bimbo on board and tell the
captain she's a tree expert, she looks at his dying palm tree and
says, "I think it dead..." One of those quotes you never forget...

The only thing like that that I can remember is on Startrek, the
original series, Bones says to Kirk, "He's dead, Jim."

Last Wednesday, on Startrek Enterprise, the Enterprise blows up and
everyone ends up dead, and then in a time reversal trick, everyone
goes back to the beginning, and everyone is okay. Weird. Lotsa
action, tho. ;-)

But how do you explain that to a kid?
http://www.oirishtimes.com/santasdead.htm

--
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