magnetic field

[YD]

On Sat, 12 Jul 2003 10:55:52 -0700, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Fri, 11 Jul 2003 15:09:15 GMT, "Brandon Berg" <bberg@cesmail.net
Gave us:


"Harry Conover" <hhc314@yahoo.com> wrote in message
news:7ce4e226.0307091520.14df2702@posting.google.com...

It would be helpful to learn what thread you are posting about!

He was obviously referring to this thread. But you just had to go and keep
it alive anyway.

You are an idiot. For one thing, you don't know how to post
properly in usenet.

Number two: Not everyone reads usenet posts in the same way you do,
thread boy.

Number three: When you change the header of a post, it is no longer
part of the "thread", YOU started a NEW thread, ya ditz.

Not really, if the references are still there the post can be kept in
the original thread, depending on your newsreader settings.

Most folks read chronologically. I don't need or shouldn't need to
re-sort my post headers just to see what you are babbling about.

I read by thread. Those that interest me are on a watch list. After
going through those I take a look at the rest and may put a few new
ones on the list.

You are so clueless, in fact, that you make an overltly long thread
look like normalcy. It is, actually. You are the abnormality.

Then you did it again with this post. So now we have a lame thread
where we discuss weather long threads are lame, or the idiot twit that
started a new thread pissing and moaning about them.

Bone up on usenet, ya little idiots. Your complaining post was, and
still is WHACK. It is up to YOU, now, to step to the pump, and get up
to speed with the rest of the world, which was, until your lame asses
wussied in, doing just fine.

Maybe you should learn some flexibility and how filters work. My
mental filters are usually quite good enough but threads that really
go overboard may end up on a kill list to reduce download time.

- YD, using newsreaders since 1995.

 

[Ian Stirling]

Ramji Dhakal <rdhakal1@binghamton.edu> wrote:

Hi,

i am making a set up for Far infrared Fizeau Interferometry in which I
will be using 1W CO2 laser(wavelength of 10.6 microns). I need an IR
CCD camera to trap the image of interference fringes. Could you let me
know where I can find the camera of my interest? I would prefer the
used ones so that I can reduce the cost of my set up significantly.
Thanks a lt in advance.

Silicon CCDs only go out to around 1um, absolute maximum.
There are solid state detectors that can pick this up, but I'm not
aware of any CCDs.
Also, cheap they arn't.
What sort of resolution do you need?

--
http://inquisitor.i.am/ | mailto:inquisitor@i.am | Ian Stirling.
---------------------------+-------------------------+--------------------------
"Don't count the humans out until the last one is dead and you have
hacked its body to bits and eaten it" -- John Ringo.

 

[Jim Thompson]

On Sun, 10 Aug 2003 21:43:51 GMT, indago <indagatio@earthlink.net>
wrote:

030810 1609 - John Jardine wrote:


Sean Mathias <seanm@prosolve.com> wrote in message
news:nu0djvoksb09csgvpk5so5ulm0vimfh0sr@4ax.com...
Thanks to all for the replies. To clarify some points as requested:
[clip]

For small transformers.
1) Measure the largest open circuit voltage.
2) Add resistors across this output voltage until it drops by about 10%.
3) Measure the current flowing. This is the maximum current you should be
taking.
(less resistance means more current to the load)

Under full loading a transformer should get warm to hotish but not too hot
to touch.
regards
john


Or, you could give it the smoke test. Just keep adding load until it starts
to smoke, then reduce the load a little.

Or when the potting starts to run out of the lead-hole (a
metal-enclosed transformer). Did that *once* ;-)

...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 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[no spam]

Jim Thompson wrote:

snip
Nor do I chastise the Times. They had to get 158 biographies by telephone in a
very few hours. That they got as much right as they did is a minor miracle.

Jim Weir

Huh? Why your biography? Are you running for governator ?

...Jim Thompson

who isn't???

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

Sounds about right

--
Registered Linux User http://counter.li.org
Don't get mad . . . . Get Linux
http://www.arachnoid.com/boycott/index.html

 

[Spehro Pefhany]

On Sun, 10 Aug 2003 16:17:05 -0700, the renowned Jim Thompson
<Jim-T@analog_innovations.com> wrote:

On Sun, 10 Aug 2003 14:43:19 -0700, Jim Weir <jim@rst-engr.com> wrote:

I would like to state for the public record that the L.A. Times article ("Race
for Governor) has a misquote from me. They stated that I designed the landing
radar for the Apollo. My comment was clear that I was part of the TEAM that did
the design. Somehow that TEAM word was left out. To my colleagues that were on
that team, I offer my apologies. I was a dim bulb amongst the stars of the
project.

Nor do I chastise the Times. They had to get 158 biographies by telephone in a
very few hours. That they got as much right as they did is a minor miracle.

Jim Weir

Huh? Why your biography? Are you running for governator ?

...Jim Thompson

http://images.latimes.com/media/acrobat/2003-08/8935049.pdf

$3,500 hunh? ;-)


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[B J Conner]

We've had enough wannabe boobs in goverment. Time to get some real ones.
I'm voting for Angelyne.
"Jim Weir" <jim@rst-engr.com> wrote in message
news:dpedjv8u982juc0b3oim13q229s8hoi1rg@4ax.com...

I would like to state for the public record that the L.A. Times article
("Race
for Governor) has a misquote from me. They stated that I designed the
landing
radar for the Apollo. My comment was clear that I was part of the TEAM
that did
the design. Somehow that TEAM word was left out. To my colleagues that
were on
that team, I offer my apologies. I was a dim bulb amongst the stars of
the
project.

Nor do I chastise the Times. They had to get 158 biographies by telephone
in a
very few hours. That they got as much right as they did is a minor
miracle.

Jim Weir

 

[Jim Thompson]

On Mon, 11 Aug 2003 01:13:55 GMT, Spehro Pefhany <speff@interlog.com>
wrote:

On Sun, 10 Aug 2003 16:17:05 -0700, the renowned Jim Thompson
Jim-T@analog_innovations.com> wrote:

On Sun, 10 Aug 2003 14:43:19 -0700, Jim Weir <jim@rst-engr.com> wrote:

I would like to state for the public record that the L.A. Times article ("Race
for Governor) has a misquote from me. They stated that I designed the landing
radar for the Apollo. My comment was clear that I was part of the TEAM that did
the design. Somehow that TEAM word was left out. To my colleagues that were on
that team, I offer my apologies. I was a dim bulb amongst the stars of the
project.

Nor do I chastise the Times. They had to get 158 biographies by telephone in a
very few hours. That they got as much right as they did is a minor miracle.

Jim Weir

Huh? Why your biography? Are you running for governator ?

...Jim Thompson

http://images.latimes.com/media/acrobat/2003-08/8935049.pdf

$3,500 hunh? ;-)


Best regards,
Spehro Pefhany

And a Democrat yet !-)

But there's a positive... Grass Valley! Go into *downtown* Nevada
City and people are out walking their *wolves* !!

(I used to do designs for Silicon Systems before they TDK'd and then
TI'd ;-)

...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 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[Jim Weir]

Yup.

Jim


Jim Thompson <Jim-T@analog_innovations.com>
shared these priceless pearls of wisdom:

->
->Huh? Why your biography? Are you running for governator ?
->
-> ...Jim Thompson

 

[Jim Weir]

Jim Thompson <Jim-T@analog_innovations.com>
shared these priceless pearls of wisdom:

->And a Democrat yet !-)

Yup. In any other county, I'd be a flaming conservative. In good old Nevada
County (one step to the right of Atilla the Hun), I'm a moderate.

->
->But there's a positive... Grass Valley! Go into *downtown* Nevada
->City and people are out walking their *wolves* !!

They need them to protect from claim jumpers. We still take hundreds of
thou$and$ in gold out of the creek that runs through downtown Nevada City and
environs.

->
->(I used to do designs for Silicon Systems before they TDK'd and then
->TI'd ;-)

I played softball for Silicon Systems (still have the jersey). Some of my best
friends have bailed from there into National, 3com, and the like, who are also
up here.

Jim

 

[Jim Weir]

blackm00@cam.org (Michael Black)
shared these priceless pearls of wisdom:

->
->So what's the story of the run for governor. Curious, I did a search,
->and it got a lot of hits for "Preliminary list of candidates for
->California recall election", and your name is actually there. But
->the stories I checked only had your name on the list, no details
->(and nothing about NASA).

I turned in my signatures (way over what I needed), my check, and my signed
documents late Friday afternoon. We don't have mail service up here over the
weekend, so the Elections Officer had to wait until this morning to mail the
certified letter to Sacramento. You don't come off the "preliminary" list until
the requisite original paperwork is in Sacramento.

Where did you get the NASA gig? I worked for an Apollo sub as part of the
landing radar team on the LEM.

->
->Will this mean you won't be able to post for a while?

I'll post when I damn well please. Running for political office does NOT remove
your rights as a citizen.

Jim

 

[Jim Thompson]

On Mon, 11 Aug 2003 08:08:13 -0700, Jim Weir <jim@rst-engr.com> wrote:

Jim Thompson <Jim-T@analog_innovations.com
shared these priceless pearls of wisdom:

->And a Democrat yet !-)

Yup. In any other county, I'd be a flaming conservative. In good old Nevada
County (one step to the right of Atilla the Hun), I'm a moderate.

-
->But there's a positive... Grass Valley! Go into *downtown* Nevada
->City and people are out walking their *wolves* !!

They need them to protect from claim jumpers. We still take hundreds of
thou$and$ in gold out of the creek that runs through downtown Nevada City and
environs.

-
->(I used to do designs for Silicon Systems before they TDK'd and then
->TI'd ;-)

I played softball for Silicon Systems (still have the jersey). Some of my best
friends have bailed from there into National, 3com, and the like, who are also
up here.

Jim

Scott Fritz, Jackie Snyder ??

...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 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

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

 

[Jim Weir]

"C What I Mean" <Nospam@yahoo.com>
shared these priceless pearls of wisdom:

->OK... if you know you don't have a snowballs chance in hell of winning, why
->are you helping to make a circus out of this election?

That's what they told Jesse Ventura, too. Jesse's total political background
was one term on the city council. Mine is two terms on the County Board. I may
not have a snowball's chance, but if I don't run, I have even LESS of a chance,
now, don't I.


I don't mean that
->with disrespect, and I actually don't mean it to be aimed at just you.....
->But, too many people are not taking this as seriously as it really is.....
->That makes the whole thing look like a cartoon..... It isn't a "fun" thing
->to do.. or at least it is not supposed to be. With so many wannabe's in
->there "just for fun", it takes away from those that have a real chance of
->winning.....

I'm running for me. But if everybody that comes out to vote for the "little
guy" votes on the recall, then we've got more than the lunatic fringe from both
ends of the spectrum making the decision, don't we? My standard line is to vote
the recall down, if you don't like that, vote for me. If you don't like me,
vote for Cruz. That's the end of the line, my story, and I'm sticking to it.


->
->Now with that said, your name sounds familiar. Did you ever know the guys
->at the now defunked Wilderness Electronics?

Nope. Teledyne Ryan for five years, Spectral Dynamics for two years, and RST
Engineering for the last 30 years.

Jim

 

[Jim Weir]

Keith Schoendoerfer, George Landsburg, Tim...(the memory fails, an excellent
analog cat), and the rest of the design crew...

Jim


Jim Thompson <Jim-T@analog_innovations.com>
shared these priceless pearls of wisdom:


->
->Scott Fritz, Jackie Snyder ??
->
-> ...Jim Thompson

 

[Doug Smith W9WI]

The Technical Manager wrote:

1. A law was passed making it a requirement for TV broadcaster to use
some system of captioning and TV manufacturers to incorporate decoding
circuits for captioning before Teletext took off in Europe. The US
closed captioning system predated Teletext and it was a technical
impossibility for a TV channel to incorporate both closed captioning and
Teletext simultaneously. If the broadcaster decided to incorporate
Teletext then all captioning would have to be on a Teletext page and
that would mean owners of an existing closed captioning only TV would
have to buy a Teletext TV if they wanted captions.

The US captioning system is NOT incompatible with teletext. Captioning
uses only line 21; teletext (at least as implemented here) used a
variable number of lines higher in the vertical interval - I want to say
13-18 but it's been a LONG time & my memory is probably wrong.

The teletext transmission standard is still used for private data
transmission in the U.S.. The Canadian firm Norpak
(http://www.norpak.ca) sells encoding and decoding equipment.

The law requiring caption decoders wasn't enacted until long after
teletext failed as a consumer service. (but again that doesn't matter
as it's possible to caption and run teletext at the same time)

2. The fragmented nature of the broadcasting industry compared to that
of Europe gave little incentive for broadcasters to add Teletext pages
to their channels unless there was a large enough audience with Teletext
TVs. At the same time TV manufacturers were reluctant to add Teletext
decoder circuits to all but their top of the range models because it
would force up consumer prices. A catch 22 situation in other words and
the government did not stick their fingers in to promote Teletext in any
way.

That's probably the biggest reason.

3. Teletext was seen as pointless in the US because of the proliferation
of dial up BBSs that emerged in the 80s prior to the internet. The BBSs
offered a two way communications facility rather than the one way system
of Teletext.

That's probably a significant reason too. Most U.S. telephone
subscribers have unlimited local calling - a single monthly charge
allows making as many calls in the local area as you want, and allows
staying on the line as long as you want. I suspect this made BBSs more
practical here than in Europe.

4. Teletext was developed for 625 line PAL systems and there was no
standard developed for 525 line NTSC systems because of disagreements
between various parties involved. The lack of a standard meant that
broadcasters and TV manufacturers did not know how to proceed if they
wanted to offer Teletext services.

There were two incompatible technical standards for teletext in the USA
at that time. One was similar to that used for 625 PAL, the other
claimed to have several improvements over the European system. (far
better graphics, for one thing.)

The government made no effort to set a single standard. (Stereo AM/MW
radio was introduced at about the same time - and it's widely believed
the failure of the US government to set a single standard led to the
failure of this innovation too.)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

 

[Paul Cassel]

Allan Adler wrote:

.

Assuming these logistical problems could be solved, there is also
the question of whether any aspect of this activity (e.g. melting
and possibly vaporizing solder) on a park bench might be illegal.

Why not check with the local police? I'm guessing you aren't at MIT or you

could find a workplace there - somewhere.

Generally, I'd guess you can do this assuming you don't make a nuisance of
yourself. Nuisance and tolerance vary from place to place, so why not just
ask? I'd suggest you tone down the details (like melting solder with a
Fresnel lens) when asking the police so as to be taken seriously.

Of course, you must be careful not to litter or damage public property by,
say, dripping solder on the bench or leaving hazardous materials around for
children in the park to get a hold of.

As a note, I had a personal lab when I was a student. I kept it broken down
in a closet in my small studio apartment. When I did my work, it'd take me a
whole hour to set up and an hour to knock down, but I'd work all night
making those setup times reasonable. There is a lot you can do with small
spaces if you put your mind to it.

-paul
ianal

 

[Aztech]

"Doug Smith W9WI" <w9wi@invalid.invalid> wrote in message
<

3. Teletext was seen as pointless in the US because of the proliferation
of dial up BBSs that emerged in the 80s prior to the internet. The BBSs
offered a two way communications facility rather than the one way system
of Teletext.

That's probably a significant reason too. Most U.S. telephone
subscribers have unlimited local calling - a single monthly charge
allows making as many calls in the local area as you want, and allows
staying on the line as long as you want. I suspect this made BBSs more
practical here than in Europe.

I don't think they're comparable, Teletext has been mainstream in millions of
homes for many years, BBS's have always been a niche thing, how many 60 year
olds went running of to a BBS to find a holiday package or the latest footy
news?

Az.

 

[Fred Abse]

On Mon, 11 Aug 2003 04:49:05 +0100, Michael Black wrote:

There was something
on the news about how Arnold Schwarzenegger films can't be shown in
California (maybe it was specifically on TV?) until after this is over.

Is there a way of making the election last forever?

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

 

[Stephen Neal]

Doug Smith W9WI wrote:

The Technical Manager wrote:
[snip]

There were two incompatible technical standards for teletext in the
USA at that time. One was similar to that used for 625 PAL, the other
claimed to have several improvements over the European system. (far
better graphics, for one thing.)

Yep - ISTR there was/is a World Systems Teletext standard for 525 regions,
and there was also NABTS (North American Broadcast Text Service?) which was
similar in concept to some of the enhancements to WST that were proposed but
not really launched in Europe (more colours, higher resolution graphics
etc.)

Didn't TBS broadcast a WST text service for quite a while?

I guses another significant difference is the broadcast landscape in the US.
In the UK (and much of Europe) - broadcasting is either networked or
regional rather than local. It is thus possible to easily centralise VBI
services in a network HQ, with only a small number of local pages required
in the main, whereas in the US broadcasting is more locally variable? I
suspect that there would be an interesting debate about who recovered the
advertising revenue - certainly in the UK many text pages on the commercial
broadcasters contain adverts.

Steve

 

[Doug Smith W9WI]

Stephen Neal wrote:

Yep - ISTR there was/is a World Systems Teletext standard for 525 regions,
and there was also NABTS (North American Broadcast Text Service?) which was
similar in concept to some of the enhancements to WST that were proposed but
not really launched in Europe (more colours, higher resolution graphics
etc.)

Yes, that matches my recollection. I don't think NABTS stood for "North
American Broadcast Text Service but sure don't recall what it *did*
stand for!

We had a NABTS decoder at my previous job. Never saw WST in action but
there were plenty of screen shots in the trade magazines. (and I'm a
RSGB member and occasionally see screen shots of European teletext in
their mag) NABTS did accomplish vastly improved graphics & color.

Didn't TBS broadcast a WST text service for quite a while?

Yes. There was another major broadcast group that was pushing WST - I
can't remember who. Setmaker Zenith was also behind it.

I guses another significant difference is the broadcast landscape in the US.
In the UK (and much of Europe) - broadcasting is either networked or
regional rather than local. It is thus possible to easily centralise VBI
services in a network HQ, with only a small number of local pages required
in the main, whereas in the US broadcasting is more locally variable? I
suspect that there would be an interesting debate about who recovered the
advertising revenue - certainly in the UK many text pages on the commercial
broadcasters contain adverts.

That's a good point. The most popular stations do relay a national
network roughly half the broadcast day, and would relay the national
teletext service during that period. But that would leave the teletext
decoders inoperative during the other half of the day. Unless you
installed a "data bridge" to strip the data from the incoming network
feed and reinsert it on the outgoing programs. While that would be
relatively inexpensive, there's no incentive to do it when you aren't
getting a cut of the advertising revenue. (actually I don't think there
ever *was* any advertising revenue here.. remember seeing a handful of
promotional logos for demonstration's sake but never any actual paid
advertising...)
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

 

[CWatters]

A stop watch works for me.

"BM" <brandon(underscore)melland@hotmail.com> wrote in message
news:xr0_a.3118$zs6.2604@nwrddc01.gnilink.net...

Can anyone help point me in the right direction?

I want to make a timer circuit using discreet components (i.e. no pics or
stamps or inputs from a PC) that will count from 0 when it turns on up to
9hrs 59mins 59secs. I also want to display the hrs, mins and secs via
7-segment displays. In addition, I would like to be able to freeze and
display the clocks count at any given moment via a hold button.



thanks