Driver to drive?

"Winfield Hill" <hill_a@t_rowland-dotties-harvard-dot.s-edu> skrev i en
meddelelse news:coisj00l0a@drn.newsguy.com...

Do you think they used -48V back then?
I would not be surprised if the -48V was what they arrived at by stringing
batteries together until "it worked" ;-)
 
"Greg Neff" <greg@guesswhichwordgoeshere.com> skrev i en meddelelse
news:62aqq0pv6fe1g0t40nl8866j4egm0pedpg@4ax.com...


US FDA, who in turn will provide an authorization number, which must
then be entered on a Canada Post CN22 form, that would then have to be
affixed to the parcel, visible for inspection by US Customs. Then and
only then will Canada Post accept the parcel.
Looks like someone is set to ensure that you get All the Government, you pay
for!

Next time you will say: "Sure Sir, I will just take this parcel home in my
own time and fill in the information" - then go to another post office and
lie!

even if he or she wanted to. So the point of all this incredibly
onerous and expensive bureaucracy is?
More Bureaucracy - that is the purpose of Bureaucracy, to multiply, seek new
hosts, and conquer new territory - until all ressources have been consumed
and the host dies. Like Cancer, basically.
 
On Wed, 1 Dec 2004 12:15:48 +0100, "Frithiof Andreas Jensen"
<frithiof.jensen@diespammerdie.jensen.tdcadsl.dk> wrote:

"Winfield Hill" <hill_a@t_rowland-dotties-harvard-dot.s-edu> skrev i en
meddelelse news:coisj00l0a@drn.newsguy.com...

Do you think they used -48V back then?

I would not be surprised if the -48V was what they arrived at by stringing
batteries together until "it worked" ;-)
Some parts of the world use(d) -60V instead of -48V. That's 5 car
batteries instead of 4.



If anyone is designing equipment to run from '48V' they should be
aware that there are well defined tolerances and surge amplitudes,
etc.
See, e.g. ETSI EN 300 132-2 V2.1.2 (2003-09)

Regards,
Allan
 
On Wed, 01 Dec 2004 02:49:31 GMT, Tom Woodrow <tomwoodrow@comcast.net>
wrote:

Send a See's gift certificate next year.

Tom Woodrow
Well that's the obvious answer, but I was unaware of the situation
this year. I had already purchased and wrapped the candy, and packed
the parcel.

See's is OK. The best chocolate that I have ever tasted (by far) is
Canadian:

http://www.williamschocolate.com/index.html

Comparing See's to Williams is like comparing Kraft Cracker Barrel to
Balderson 5 Year Cheddar.

================================

Greg Neff
VP Engineering
*Microsym* Computers Inc.
greg@guesswhichwordgoeshere.com
 
On Wed, 01 Dec 2004 07:28:27 -0500, Greg Neff
<greg@guesswhichwordgoeshere.com> wrote:

See's is OK. The best chocolate that I have ever tasted (by far) is
Canadian:

http://www.williamschocolate.com/index.html

Comparing See's to Williams is like comparing Kraft Cracker Barrel to
Balderson 5 Year Cheddar.
They are Belgian, according to their web site.

d
Pearce Consulting
http://www.pearce.uk.com
 
On Wed, 01 Dec 2004 10:34:18 GMT, Jonathan Kirwan
<jkirwan@easystreet.com> wrote:

I saw a post of a spice simulation, with you saying: "I got 193 closer
to the
spice simulation value." Later, I think, I also saw an expression
without
derivation or basis, so I wasn't able to check your thinking. That's
where I'm
at with what you wrote. I believe I exposed my thinking quite
clearly, in
contrast.

Jon
The post I'm talking about is a later one.

The expression I derived was

Av = (-) hfe* Rc||Ro / Rs + rb + (hfe/gm)

which simplifies to the common emitter gain thats noramlly used

gm * Rc || Ro

if you ignore the Resistance of the source Rs and the base resistance
rb.

Its quite easy to derive so I don't imagine you'd have any problems

doing so but I can't see how you can calculate the
gain if you ignore beta in the more accurate formula.
 
Thanks for the reply, Paul.

Where is the data (voltages, currents) you are stating
from ? We've been unable to find such detailed information about the
operation of the HC14. Alternatively, do you know if it's possible to
see its schematic ?

Eli
 
eliben@gmail.com wrote:

Where is the data (voltages, currents) you are stating
from ? We've been unable to find such detailed information about the
operation of the HC14. Alternatively, do you know if it's possible to
see its schematic ?
The Philips HCMOS data book, 1988. But it's also here:
<http://www.semiconductors.philips.com/acrobat/datasheets/74HC_HCT14_3.pdf>

Paul Burke
 
On Wed, 01 Dec 2004 10:34:18 GMT, Jonathan Kirwan wrote:

On 1 Dec 2004 01:58:12 -0800, "lemonjuice" <exskimos@anonymous.to> wrote:

snip
I posted my results earlier on this thread and I showed how you can use
beta. As a matter of fact it seems there is no way of including
the base and source resistances and hence getting a more accurate
result without including beta.

I saw a post of a spice simulation, with you saying: "I got 193 closer to the
spice simulation value." Later, I think, I also saw an expression without
derivation or basis, so I wasn't able to check your thinking. That's where I'm
at with what you wrote. I believe I exposed my thinking quite clearly, in
contrast.
He included Ibb and Rs, he says, and yet I came closer to the Spice
result just using

gm(Rc || Ro)
--
Best Regards,
Mike
 
Winfield Hill <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote in message news:<coisj00l0a@drn.newsguy.com>...
JeffM wrote...

when this stuff was invented

Yup. Stroger Switches were invented in 1884--by an undertaker.

Do you think they used -48V back then?
It was less standardized. Short loops were as little as -12V, long
loops could be more than -48V. It depended on who was selling the
switch and equipment too.

Large parts of the civilized world use -24V as the default on telco
loops.

Tim.
 
On Tue, 30 Nov 2004 23:17:49 -0500, Spehro Pefhany wrote:

On 30 Nov 2004 19:14:14 -0800, the renowned Winfield Hill
hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:

Tom Woodrow wrote...

Send a See's gift certificate next year.

Ah, See's I heartily recommend. Good stuff from California.

But if you really want Mackintosh toffee or a mint Aero bar (or a can of
Tim Horton's coffee) what good does that do you?
Heh. See's Candy. Chocolate-covered chocolate. ;-)

American Express is promoting "gift checks" this year - it's a gift
certificate that works like a gift certificate, but anywhere. And another
cool gimmick I saw at the bank is a traveler's card - it works like a
debit card, but prepaid with only a certain amount of cash, and it's
protected like traveler's checks. Sounds like a pretty neat idea, actually.

Cheers!
Rich
 
Rene Tschaggelar wrote:
Frank,
I have to answer these questions whenever I order in the US
directly. Be that digikey, linear technology, minicircuits,
whatever. They have the goverment wanting them to ask these
questions, and you have to write something that fits the
expected. Make sure to check the boxes promising that you
don't make WMD's, are not involved in nuclear nor arms
technology.
I admit that the questions about the end customer of
the products built by your parts ARE espionage.
Just write something that is expected.
Arab hobbyists interested in secure communications and nanosecond high power
pulsing.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org
 
So, what you call base current is what all the rest of us, including
all
the text books call err.. the emitter current. Yeah right on
dude...Your
just trying to squirm you way out of this now.
So you call it emitter current . LOL
Incidentally its not but you've proved to be too stupid to understand
why.
Another dummy Kalyward /Mike theory.
LMAO
 
On Wed, 01 Dec 2004 13:18:44 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Wed, 01 Dec 2004 16:37:13 +0000, the renowned Dirk Bruere at Neopax
dirk@neopax.com> wrote:

Well, in a few short years he will be able to buy direct from China, no
questions asked.

When there were severe restrictions on sales of Intel processors and
such like, it was possible for anyone to buy as many as they wanted in
the shops in the free trade meccas of Hong Kong and Singapore, then
grab a water taxi to any of the ships in harbor from all over the
world, including countries the US has determined to be their "ennemis
du jour". There's no practical way to stop the flow of this kind of
common dual-use stuff that doesn't amount to suicide in the commercial
marketplace.



CPU power equivalent to one VAX MIP was embargoed, and as far as I
know may still be. A decent laptop these days must be around 1000 VAX
MIPs. And The Bomb was designed with slide rules.

John
 
Dirk Bruere at Neopax wrote:

Rene Tschaggelar wrote:

Frank,
I have to answer these questions whenever I order in the US
directly. Be that digikey, linear technology, minicircuits,
whatever. They have the goverment wanting them to ask these
questions, and you have to write something that fits the
expected. Make sure to check the boxes promising that you
don't make WMD's, are not involved in nuclear nor arms
technology.
I admit that the questions about the end customer of
the products built by your parts ARE espionage.
Just write something that is expected.


Arab hobbyists interested in secure communications and nanosecond high
power pulsing.
Unfortunately reality is simpler.
None of the above is required to fly a plane into a building.
Somehow the cause of the regulations are forgotten.


Rene
 
BFoelsch wrote:

I really doubt that. I would suspect that the telephone system was one of
the first real examples of engineered systems, definitely engineered
electrical systems. Of course, they could have "tweaked to suit" during the
developmental era, but I would guess that every nuance and implication of
the voltage chosen was carefully considered once they got to the
implementation stage.
Indeed. Take a look here to see how much thought they were putting
into the system back in 1872...
http://sd.znet.com/~cdk14568/mpet/contents.html

Here is the section on voltage ang grounding. (note that this was
written before there was such a thing as a "volt"!)
http://sd.znet.com/~cdk14568/mpet/chap10.html#para169

BTW, here is an interview with an early radio pioneer who says
"normally in an arc transmitter the positive was grounded to
simplify cooling problems"...

http://www.ieee.org/organizations/history_center/oral_histories/transcripts/wh
ite19.html

Guy Macon <http://www.guymacon.com>
 
Hi John,

The coin envelopes *are* the cards!
That only works for SMT. I remember a friend who used envelopes for DIP
packages as well. One day he fumbled through them, let off a terrible
yell, pulled his hand out and had a pin wedged under a fingernail,
effectively tacking the envelope to the finger.

Regards, Joerg

http://www.analogconsultants.com
 
Hi Jim,

I thought all your parts were on a hard disk and scalable ;-)

Regards, Joerg

http://www.analogconsultants.com
 
Daniel Rudy wrote:

The two diode full wave rectifier is a better idea than the bridge
circuit that I considered using. I'm sure that an autotransformer would
work, but I need a break in the positive rail in case one of the
switching transistors short out. Looks like more pSpice work needs to
be done.
As long as the center of the auto transformer is connected to the
negative rail, the rectifiers cannot put out a positive rail voltage
from a blown fet. The inductor just saturates and blows the input
fuse.

--
John Popelish
 
Rich Webb is, and always will be:

I'm not Rene (but I think that's a dang good idea).

What could be done would be to use a setup like MySQL or PostreSQL for
the database and use PHP as the glue between the query language and the
web page creation.
I think this can be done, not as a webpage, using MS Access.
Then you can have the queries, reports...

IIRC, MS Access 2000 has an ActiveX component that allows to access
database from webpage.

I can't try here because my MS-Office install is broken and I have only a
MS Office 97 license, anyway.

[]s
--
Chaos MasterŽ, posting from Canoas, Brazil - 29.55° S / 51.11° W
"Don't try to fix me -- I'm not broken"
To reply remove "DEADTOTHESPAMMERS" from address --->
renan.birckDEADTOTHESPAMMERS@gmail.com
 

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