HDTenEightyP/NetNews huggingface dataset:
From: kludge@grissom.larc.nasa.gov (Scott Dorsey)
Newsgroups: sci.electronics
Subject: Re: 110/220 V AC why ?
Date: 29 Dec 1992 16:15:43 GMT
Organization: NASA Langley Research Center and Reptile Farm
NNTP-Posting-Host: grissom.larc.nasa.gov

In article <1992Dec29.160117.12068@cbfsb.cb.att.com> medha@cbnewsg.cb.att.com (keshav.havnurkar) writes:
>Hi
>  I am curious to know why some countries have 110V AC supply
>and some 220V AC as their main line voltage ?
>Any paticular reason for selecting any one number ? Is there
>any talk of standardizing this like SI syatem of measurement ?

Well, some countries have 240V power, too.  And Japan has 100V.  There
used to be 136V service in a couple of South American countries, and
I know there is still 208V service here in the US (coming from a single
leg of a 240V three-phase line).

Even in the US, there is 120V power, 110V power, 115V power, and 117V power,
all standards used in different locations.  Of course, because of the voltage
drop from the distribution transformer to your outlet, in some locations
there might be 115V at the pole and 110V at your outlet.  This happens a
lot in rural areas where the distances between farms is fairly great and
they may share a transformer.

Frequency is even more fun.  Some countries have 50 Hz power.  Other 
countries have 60 Hz power.  In some places you can even get 25 Hz 
power (which used to be very popular for large rotating machinery, but 
which has fallen into disuse).

Confused enough?  Wait, it gets better when you start talking about actually
trying to plug things in.  While the frequency and voltage is pretty much
constant across Europe, the plugs used in the UK are different from those
used in Switzerland, which are different from those used in France.  Of
course, they all differ from those used in the US, and those used in
Australia.

You want standardization?  Sure, we've got lots of standardization.  I've
got my standards, you've got yours, and everybody else has their own, too.
I don't see this changing much in the next hundred years or so, but we
can hope.
--scott
Newsgroups: sci.electronics
From: pierson@empror.enet.dec.com (dave pierson)
Subject: Re: Disc-cone antenna
Organization: Digital Equipment Corporation
Date: 31 DEC 92 17:07:50    

In article <C04xsF.LL0@inews.Intel.COM>, dsehr@morticia.intel.com
(David Sehr ~) writes, in part:

>A while back I was at a friend's place and he had a VHF/UHF radio
>(army surplus stuff) hooked to what he called a ``disc-cone'' antenna.
	More commonly spelt discone.

>He claimed the antenna covers a reasonably wide band of frequencies,
>and what really attracted me was how small it was.  Well, I was
	Errrr welll.  The lowest usable frequency is (roughly) the
	frequency at which the skirt is a quarter wave.  So it will be
	roughly the same size as a conventional antenna.  Its wide band is
	in the upwards direction, in frequency.

>wondering if such an antenna might be useful for TV reception in an
>apartment.  I know essentially nothing about antennas, but it would be
>nice to have a nice omnidirectional antenna so that I don't have to
>keep fiddling with rabbit-ears.  (I realize this may cause multipath
>problems, though.)  Any ideas whether such an antenna would be useful
	Not may.  8)>>  WILL.  The fiddling is deghosting, in technical terms,
	nulling the multipath.  The older "bow tie" (at both UHF, and its larger
	cousins at VHF) antennas are, effectively, two discones
	"center-to-center" without the disc.

>as a TV antenna?  Suggestions for how to build one?
	TV runs from 50 odd to 200 odd (without digging out charts...)
	Scanners can work 30-50, 120-170 ("blank spot" in the middle of TV
	band), and 400 and up.  So the scanner style will work as well as any.
	(Fancy scanners cover it all, and let you watch tv.  8)>>)
	(This is the "tip of the iceberg" on ALL these subjects.  I decline to
	become verbose on any.  Unless argued with.  8)>>)

	Also, the classic discone is vertically polarized, and most TV is
	horizontally polarised, so the discone should go on its "side".  At
	which point it ceases being omnidirectional.  And has to be reaimed for
	each channel.

thanks
dave pierson			|the facts, as accurately as i can manage,
Digital Equipment Corporation	|the opinions, my own.
40 Old Bolton Rd		|I am the NRA.
Stow, Mass, USA	
01775				pierson@msd26.enet.dec.com
"He has read everything, and, to his credit, written nothing."  A J Raffles
Newsgroups: sci.electronics
From: "glen mead" <glen.mead@canrem.com>
Subject: lasers/collimated light i
Reply-To: "glen mead" <glen.mead@canrem.com>
Organization: Canada Remote Systems
Distribution: sci
Date: 29 Dec 92 22:46:55 EST

jlange@radian.uucp (John Lange) writes:

JL>In nightclubs I have recently seen light effects which apparently
JL>use bright red, green, and blue lasers which are modulated with
JL>mirrors (I think) to do interesting things like project color
JL>images on a wall.  The red could be a simple He-Ne laser, but what
JL>about the green and the blue?  I know these light sources can be
JL>made with expensive

The rest of your message appeared to get cut off so I'd be interested in
hearing more about what you had in mind.  The red is most likely a HeNe
laser as you mentioned while the red and green could be Argon lasers.  Or
you could go with a tunable dye laser which is capable of many different
colours (wavelengths).  Are you working on somee project or something? 
I'd appreciate hearing more from you since I am working on a project using
lasers myself (the diode variety at the moment).

Glen Mead - RZ/RD 500 Owners Group
---
 * Amiga-Reader V2.00B * 
--
Canada Remote Systems  - Toronto, Ontario
World's Largest PCBOARD System - 416-629-7000/629-7044
Newsgroups: sci.electronics
From: wtm@uhura.neoucom.edu (Bill Mayhew)
Subject: Re: Disc-cone antenna
Organization: Northeastern Ohio Universities College of Medicine
Date: Fri, 01 Jan 1993 15:32:29 GMT

The other problem with a disc cone antenna is that it doesn't
realize much gain.  The principal advantage is relatively wide
freqency coverage with good feedline match.  I used to do EMI/EMC
testing, and we used active (amplified) disc cone antennas quite a
bit because it made sweeping around in freqency to locate RFI
birdies easy with only a couple of antennas required.


-- 
Bill Mayhew      NEOUCOM Computer Services Department
Rootstown, OH  44272-9995  USA    phone: 216-325-2511
wtm@uhura.neoucom.edu (140.220.1.1)    146.580: N8WED
Newsgroups: sci.electronics
From: franzoni@sixter.var.dec.com (Mauro Franzoni)
Subject: Re: Home Automation Newsgroups
Keywords: Home Automation Newsgroups
Reply-To: franzoni@sixter.var.dec.com (Mauro Franzoni)
Organization: Digital Equipment Corporation
Date: Mon, 28 Dec 1992 16:26:56 GMT

In article <1992Dec21.035731.197@kd4dts.dixie.com>, jcw@kd4dts.dixie.com (John
C. Wren) writes:
|> Does anyone know of a newsgroup on the net that pretty much stays confined
|> to the home automation arena?  I'm making plans for building my next house,

Sometime ago someone started a proposal for such a news group ... but then I
read no followup.
I'd be very much interested in the subject because my house is (more and more)
automated.

mf
From: choy@skorpio.usask.ca (I am a terminator.)
Newsgroups: sci.electronics
Subject: Re: Handling CMOS
Date: 1 Jan 1993 23:13:04 GMT
Organization: University of Saskatchewan, Saskatoon, Canada
Distribution: all
NNTP-Posting-Host: skorpio.usask.ca

In article <1hjruvINNoj1@crcnis1.unl.edu>, jskean@unlinfo.unl.edu (jonathan skean) writes:
|> kcarver@dante.nmsu.edu (Kenneth Carver) writes:
|> 
|> >4000 series CMOS is well-protected and requires few if any special
|> >handling precautions.

In general, how is protection done?

-- 

Henry Choy
choy@cs.usask.ca

  What rolls down stairs alone or in pairs
  Rolls over your neighbor's dog?
  What's great for a snack and fits on your back?
  It's Log, Log, Log!      -- "The Log Song", from Ren & Stimpy

  Math is tough!           -- Barbie
Xref: sparky sci.electronics:21649 sci.energy:6466 rec.autos.tech:17189
From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 28 Dec 1992 20:10:13 GMT
Organization: HST Wide Field/Planetary Camera
Distribution: world
Reply-To: carl@SOL1.GPS.CALTECH.EDU
NNTP-Posting-Host: sol1.gps.caltech.edu

In article <1h7r1iINNqo5@access.usask.ca>, choy@skorpio.usask.ca (I am a terminator.) writes:
>The particles will fly off linearly, but what if the housing surrounding the
>flywheel was turning? Then the breaking flywheel may just cause the housing
>to turn faster. The flywheel particle momentum is lost with a less
>forceful impact (prolonged impact) because the turning housing is moving at
>a lower speed relative to the flywheel particles (which in turn move at a
>lower speed relative to the housing). It's a flywheel inside a flywheel inside
>a flywheel.

So you're proposing nested flywheels?  Well, unfortunately, there's that nasty
old law of conservation of energy again:  You're trying to store a certain
amount of energy. That energy has to go someplace.  Now, you can spin a little
flywheel up *REAL* fast, or you can use a somewhat larger flywheel, which
doesn't have to be spun up quite so fast.  Or you could have your flywheels
within flywheels scenario.  First of all, such a setup would require much
higher precision in the implementation of the system.  Second, what if it were
the rotating container that failed?  That'd be likely to cause a failure of the
internal flywheel, and you still get a rather large boom.
--------------------------------------------------------------------------------
Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL

Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
understanding of astronomy is purely at the amateur level (or below).  So
unless what I'm saying is directly related to VAX/VMS, don't hold me or my
organization responsible for it.  If it IS related to VAX/VMS, you can try to
hold me responsible for it, but my organization had nothing to do with it.
Newsgroups: sci.electronics
From: sumner@math.scarolina.edu (David Sumner)
Subject: Caller ID Technical Info
Organization: USC  Department of Computer Science
Date: 21 Dec 92 21:07:48 GMT


Does anyone know of a source for
information on how Caller ID works
and/or any information on how it might
be possible to get the information from the 
phone line into a computer vis the RS-232 port?
 
Tahnks for any information,
David Sumner
 
Xref: sparky sci.electronics:21524 sci.energy:6431 rec.autos:30467
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flywheel batteries as EV power source
Date: 24 Dec 92 03:11:21 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

In <1992Dec23.180140.7552@enterprise.rdd.lmsc.lockheed.com> news@enterprise.rdd.lmsc.lockheed.com writes:

>I'm not sure if the massive thermal gradient helps us or hurts us.

Depends on the thermal expansion coefficients.  Very small, no big deal.  If
it is large, the strain could shatter the containment vessel all by itself.

-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
From: vporguen@unlinfo.unl.edu (victor porguen)
Newsgroups: sci.electronics
Subject: Caller ID is a ripoff!
Date: 22 Dec 1992 06:08:40 GMT
Organization: University of Nebraska--Lincoln	
Distribution: world
NNTP-Posting-Host: unlinfo.unl.edu
Keywords: Caller ID Telephone

Writes kucloak@kuhub.cc.ukans.edu (Bryan Kennedy Reed), in response
to a complaint about Caller ID posted by chelf@lunatix.uucp (Chad 
Helfe
nberger):

> Just which amendment is being violated?  I assume you are saying 
> it is a violation of the right to privacy which is a penubra right 
> derived from the first and fouth amendments.  Just where does this 
> violation occur?  The constitution does not give someone the right 
> to be stupid.

It's a sorry time when all we can think of is whether the actions
of the Telephone Companies in looking for added revenue must be
either "constitutional" or "unconstitutional".  Nor we are jurists 
here - we are not.

It's a sorry time when basic social issues such as the right to 
privacy, a concept that even a child has no trouble accepting, 
understanding and using, must be justified by quoting chapter and 
verse of legal precedent.

It's a sorry time when business enterprises are so easily allowed 
to resort to violating people's privacy in order to earn some 
additional moneys which they should have earned more cleanly by 
providing better or more efficient service, not by gouging clients.

And it's a very sorry time indeed when the Public Utilities 
Commissions, supposedly organized to protect taxpayers by regulating 
the Telephone Companies, cater instead to the demands of those
they are supposed to regulate!
From: bg@ccwf.cc.utexas.edu (Brent Goodrick)
Newsgroups: sci.electronics
Subject: Re: lasers/collimated light i
Date: 2 Jan 93 05:34:04 GMT
Distribution: sci
Organization: The University of Texas at Austin, Austin TX

As I live in Austin, Texas, I thought I could help you all out with the
address and phone number of LightWave Research:

LightWave Research
2209 W Braker Ln
Austin, TX 78758
512-832-0363

Good Luck!

Brent Goodrick
University of Texas at Austin
Electrical Engineering

Newsgroups: sci.electronics,sci.energy,rec.autos.tech
From: byron@cc.gatech.edu (Byron A Jeff)
Subject: Re: Caller ID Technical Info
Reply-To: byron@cc.gatech.edu (Byron A Jeff)
Organization: Georgia Institute of Technology
Date: Mon, 21 Dec 1992 22:47:31 GMT

In article <sumner.724972068@milo.math.scarolina.edu> sumner@math.scarolina.edu (David Sumner) writes:
>
>Does anyone know of a source for
>information on how Caller ID works
>and/or any information on how it might
>be possible to get the information from the 
>phone line into a computer vis the RS-232 port?

There's a fairly good description in the August 1991 issue of "Radio 
Electronics" in Don Lancaster's Hardware Hacker column. He also has pointers
to the Bell (or was it Nynex) spec. Check it out.

BAJ
> 
>Tahnks for any information,
>David Sumner
> 


---
Another random extraction from the mental bit stream of...
Byron A. Jeff - PhD student operating in parallel!
Georgia Tech, Atlanta GA 30332   Internet: byron@cc.gatech.edu
From: harpe@netnews.louisville.edu (Mike Harpe)
Newsgroups: sci.electronics
Subject: Re: Caller ID Technical Info
Date: 21 Dec 92 23:54:18 GMT
Organization: University of Louisville

byron@cc.gatech.edu (Byron A Jeff) writes:

>There's a fairly good description in the August 1991 issue of "Radio 
>Electronics" in Don Lancaster's Hardware Hacker column. He also has pointers
>to the Bell (or was it Nynex) spec. Check it out.

Our library does not have RE.  Could some kind soul FAX this to me?  I'll
send the number if you can!

Thanks!
-- 
Mike Harpe
University of Louisville
Internet: harpe@hermes.louisville.edu
"He's not a man, he's a remorseless eating machine!" - The Simpsons
From: johnp@silver.lcs.mit.edu (John Palaima)
Newsgroups: sci.electronics
Subject: Person who responded to my request for a CDP6551AE2
Date: 26 Dec 1992 02:55:58 GMT
Organization: MIT Laboratory for Computer Science
Distribution: usa
NNTP-Posting-Host: silver.ai.mit.edu

-- 
johnp@silver.lcs.mit.edu      |    Its not impossible, just improbable
johnp@pro.angmar.uucp         |            (Zaphod Beeblbrox)
bl298@cleveland.freenet.edu   |   N1NIG@amsat.org (Being a Ham is so grand)
Xref: sparky sci.electronics:21841 sci.physics:22019
From: quest@iowegia.uucp (Steve J. Quest)
Newsgroups: sci.electronics,sci.physics
Subject: Re: Lasers/collimated light in RGB?
Date: Fri, 01 Jan 93 00:46:01 CST
Distribution: world
Organization: Iowegia Public Access Usenet/UUCP, Clive IA USA.

jeh@cmkrnl.com writes:

> In article <1992Dec29.195908.15003@radian.uucp>, jlange@radian.uucp (John Lan
> > In nightclubs I have recently seen light effects which apparently
> > use bright red, green, and blue lasers which are modulated with 
> > mirrors (I think) to do interesting things like project color 
> > images on a wall.  The red could be a simple He-Ne laser, but what 
> > about the green and the blue?  
> 
> A Krypton ion laser with flat (non-wavelength-selective) optics produces very
> nice red, yellow, green, and blue lines -- in proportions such that the beam 
> a fair approximation to white!  (a laser emitting a white beam looks DAMNED 
> strange at first!)  Run this through a prism and you have the four colors to 
> with independently.  Most if not all of the "Laserium" laser light shows use
> Krypton lasers. 

Jamie,

        Krypton lasers produce yellow, red (about 720nm, very 
pretty) and infrared.  Argon lasers produce many bands of blue and 
green.  Coherent produces a nice laser (ours produces 8000mw of 
white light- can burn your hand) the Purelight laser.  It is an 
Ion laser- as is all gas plasma lasers................sq

(there are argon, krypton and argon/krypton mix gas lasers.  Of 
course the mix gas lasers are most expensive, ours was about 25 
thousand dollars new...)

Newsgroups: sci.electronics
From: nagle@netcom.com (John Nagle)
Subject: Re: How would you detect lack of a square wave?
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Sat, 2 Jan 1993 18:44:55 GMT

jimbo@socrates.umd.edu (Jim Bogard) writes:
>What's the best way to detect the presence/lack of a square wave?
>I'm trying to build a 'valid video present' indicator, and I have
>some chip I got from DIGI-KEY (number not handy) which strips
>horiz/vert sync and provides them seperately.  Now I'm wrestling
>with the problem of getting a TTL out from the mess indicating 
>what's going on.  Anybody got any ideas?  Or is there perhaps a 
>chip which will do this for me and I'm being stupid?

      I'd check the current National Semiconductor catalog; they have
a line of video sync extractors.  The ones in the 1989 book don't have
a "valid video output" pin, though.  You do need that; most sync extractors
produce reasonable sync outputs even when no input is present, since 
TV sets aren't usually designed to stop sweeping when no signal is present.

      You could also get a color decoder IC; those usually have a pin which
indicates whether a color burst is present.  That's usually a solid indication
that a valid color TV signal is present.  

					John Nagle
Newsgroups: sci.electronics
From: winchebs@cda.mrs.umn.edu (Benjamin S Winchester 1429580)
Subject: Sony STR 790  &^^^ Help Me ^^^&
Organization: University of Minnesota - Morris
Distribution: Mon Dec 28 14:39:20 CST 1992
Date: Mon, 28 Dec 1992 20:51:22 GMT

From: winchebs@cda.mrs.umn.edu
Newsgroups: sci.electronics,rec.audio
Organization: University of Minnesota - Morris
I own a Sony STR-790 surround sound and have the following problem.  With two
Scott speakers up front and two Infinity's in the rear (and a center one
of course) when I turn up the volume a *bit* loud, crackling can be heard in
the rear speakers, and then the PROTECTOR jumps on and the system is locked.
This is my second unit, and the same problem occurs.  The wiring is not
faulty, and it even occurs when the Scott's are the rear and the Infinity's
are up front.  If anyone has a clue, please contact me.

Thanks in advance.
Benjamin Winchester   winchebs@cda.mrs.umn.edu
From: tquinn@heartland.bradley.edu (Terry Quinn)
Newsgroups: sci.electronics
Subject: NEED I/C (REPOST)
Date: 22 Dec 1992 06:50:17 -0600
Organization: UTexas Mail-to-News Gateway
Reply-To: tquinn@heartland.bradley.edu
NNTP-Posting-Host: cs.utexas.edu



I am looking for an IC, a Mostek MK5017.  This is a relatively
old chip, used in a Heathkit GC-1005 electronic alarm clock.
I've contacted Heath and a couple of companies (ECG, and SGS
Thomson who bought Mostek) and none sell the 
chip anymore.  Therefore I would be willing to buy a used one
if someone has one.  Please send response by email.  Thank you

--
                                    Terry Quinn
                                     Germantown Hills, IL
                                      tquinn@heartland.bradley.edu
from Compuserve . . .                  >INTERNET: tquinn@heartland.bradley.edu
From: miles@emx.cc.utexas.edu (Miles Abernathy)
Newsgroups: sci.electronics
Subject: Re: Where can i find a cheap GAL programmer?
Date: 2 Jan 93 04:35:09 GMT
Organization: Univ. of Texas
X-UserAgent: Nuntius v1.1.1d10
X-XXMessage-ID: <A76A77ABD801B973@slip-x15.ots.utexas.edu>
X-XXDate: Fri, 1 Jan 93 22:35:23 GMT

"Where can I find a cheap GAL programmer?" Be careful, the government
will be on your case for specifying a gender preference in hiring. And
I'd watch my language..."gal" is a pretty condescending term!

And if that isn't enough, your later mention of a desire for BUYING a gal
programmer is gonna get you in BIG trouble  :-)
From: SPGJAF@CMSA.Berkeley.Edu (Joseph A. Faracchio)
Newsgroups: sci.electronics
Subject: Re: White noise generator???
Date: Wed, 30 Dec 92 12:25:52 PST
Organization: UC Berkeley (TCPIP)
NNTP-Posting-Host: cmsa.berkeley.edu

In article <1992Dec28.182912.2486@crash>
jsawyer@crash.cts.com (John Sawyer) writes:
>        How do I get/generate White noise easily???  Any help would be
 
I saw an electronics kit that when built produces white noise,
at Al Lasher's Electronics here in Berkeley.
They just got a dozen kits in stock from some company in Belgium.
 
My favorite is the barking dog motion sensor.  I think of the
havoc I could instill in my cats :-)  (cat lovers: just kidding!  )
 
They are all prices from 15.95 to 39.95
 
    Al Lasher's Electronics  1734  University Ave   Berkeley  94703
       (510) 843-5915   8:30-5 m-f & sat til 2pm
hope this helps .. joe.f.
From: mpaul@unlinfo.unl.edu (marxhausen paul)
Newsgroups: sci.electronics
Subject: Intel BBS / 8052BASIC Code...
Date: 22 Dec 1992 13:51:24 GMT
Organization: University of Nebraska--Lincoln	
Distribution: global
NNTP-Posting-Host: unlinfo.unl.edu

I was emailed a notice concerning the 8052BASIC code being public domain
and available on the Intel BBS in Chandler, AZ, and I wanted to know
two things from the sender:
1) What was the phone number of the BBS 
2) Would he be so kind as to email me the material if possible.

However, my reply bounced.  So if ogicse!bit!thomas or anyone else who
is able to tell me this number, or has this stuff already can post
or email, it would be useful.  Anyone who actually has this stuff
in e-mailable format need not ask permission to mail it first, I really
do want the 8052BASIC code.

--
paul marxhausen .... ....... ............. ............ ............ .......... 
 .. . .  . . . university of nebraska - lincoln .  . . .. . .  .. . . . . . . .
 .     .    .  .   .     .   .  .    .   .  .   .    .   .  grace .   .    .  . 
   .         .       .      .        .        .      .        .   happens .