HDTenEightyP/NetNews huggingface dataset:
From: barkman@gamma.is.tcu.edu (MYLES BARKMAN - KG5AI TX A&M U)
Subject: Telephone questions - the sequel
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas Christian University
Date: Thu, 23 Jul 1992 06:58:00 GMT

OK.  I haven't seen enough phone questions so here we go again.  I'm 
interested in having the ringback numbers for places like Fort Worth, Dallas,
College Station and Houston.  I'd also like the computer read-back-the-number-
you're=calling-from-number for these places.  I have the read-back numbers
for Houston, Fort Worth and College Station but there maybe more.  Also, the
one for Fort Worth is 10 digits long while Houston and College Station are
only 3.  Maybe there is a 3-digit one as well.  Any die-hard phone buffs
out there?

-----------------------------------------------------------------------------
Myles Barkman                                                Fort Worth TX
KG5AI
BARKMAN@TCUCVMS
BARKMAN@GAMMA.IS.TCU.EDU
CCVAX3::BARKMAN
-----------------------------------------------------------------------------
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
From: dvsg0223@uxa.cso.uiuc.edu (David Salamon)
Subject: Re: Airport X-Rays
Organization: University of Illinois at Urbana
Date: Fri, 24 Jul 1992 17:44:33 GMT

smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC) writes:

>The X-rays themselves won't do any damage, unless you're carrying something
>like 1000ASA photographic film, but they use pretty hefty electromagnets
>to focus the beam, so I never trust floppies or tapes in them, just in case.

Just a physics point here, but electromagnets will not focus ANY
electromagnetic wave, including X-rays.  Remember superposition of fields?
People have been trying to focus X-rays for many years without much success.
Virtually all X-ray machines just use incoherent, unfocussed X-rays.

If there are magnets in those X-ray machines, they are most likely in the 
motors running the conveyer belt.

David

--------------------------------------------------------------
David Salamon                Physics Graduate Student (Slave)
d-salamon@uiuc.edu           University of Illinois
--------------------------------------------------------------

Xref: sparky sci.electronics:13529 rec.audio:10974 alt.folklore.computers:11347
From: asmith@physics.adelaide.edu.au (Andrew Smith)
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
Subject: Re: Two-sided CD's *DO* exist! (was Re: Life after CDs)
Date: 29 Jul 92 02:06:07 GMT
Followup-To: sci.electronics
Organization: Department of Physics, University of Adelaide, South Australia

In article <1992Jul28.031414.4267@portal.vpharm.com> dap@portal.vpharm.com (David A. Pearlman) writes:
>In article <27JUL199215011713@rover.uchicago.edu> frank@rover.uchicago.edu writes:
>>In article <1992Jul27.182147.1332@portal.vpharm.com>, dap@portal.vpharm.com (David A. Pearlman) writes...
>>>This isn't the first time Polygram has taken an offbeat road to promote
>>>their artists. Around 1980, they issued a couple of promo-only samplers
>>>(vinyl LP's) that played from the inside-out (more recently, Capitol took
>>>the same route and issued a 12" EP by the group School of Fish that played
>>>from the inside out).
>>
>>      Anybody remember who the group was that came out with a 3-sided LP?
>>      I remember the technology, but can't remember who did it.
>>
>>      Side one was normal, other side contained 2 parallel spiral tracks.
>>      Depending on just where you sat the needle, you got two different
>>      tunes.
>
>As someone else already noted, that album was by Monty Python: "Matching
>Tie and Handkerchief." Note that this only applied to original pressings
>of the album. When Arista reissued the album in the '80's, the mysterious
>"3rd side" disappeared.

I first heard Monty Python's Matching Tie and Handkerchief on a cassette
which I borrowed from a local library, and I liked it so much that I
went out and bought the record.  When I first played the record, I was
somewhat disappointed to find that half of the second side appeared to
have been left out for some reason (of course, there was no mention of
the unusual track structure on the cover of the album).  In fact, I got
the same outcome on the first three times that I played it.  When I
played it the fourth time, and got, er, something completely different,
I thought, for a moment, that I was going mad.

I vaguely recall once seeing advertisements on television for a horse
racing game of some sort.  It used the same idea as above to record a
number of different race calls; the idea was that each time you played
the record, you got a different outcome.  I don't remember any details
of the game; this must have been around 1975 give or take a couple of
years.

- Andrew.

--
Andrew Smith  (asmith@physics.adelaide.edu.au)        It's worse than that, it's
Department of Physics and Mathematical Physics        physics Jim!
The University of Adelaide
GPO Box 498 Adelaide SOUTH AUSTRALIA 5001                        - Star Trekkin'
Newsgroups: sci.electronics
From: markz@ssc.wa.com (Mark Zenier)
Subject: Re: MC1377
Organization: SSC, Inc., Seattle, WA
Date: Mon, 20 Jul 1992 17:56:52 GMT

In article <1992Jul17.050115.3885@ee.eng.ohio-state.edu> fwilson@ee.eng.ohio-state.edu (Fred Wilson) writes:
>If anyone out there has had experience with the Motorola MC1377
>please let me know.

A capsule summary.

1. Active Electronics has a $25 line item minimum so you have to buy
 more than you need.

2. The strange parts (Delay line, Chroma bandpass transfomer) are available
from Digikey in the Toko section.

3. The spec sheet is miserable, but the stuff you need to know is in the
application note.  (AN932)

4. The way the color burst is generated is hokey, but you can override it.

5. The output is NTSC, or close to it, with all the limitations that
implies.  Hint: there is a reason the original IBM Color Graphics Adapter
has a 40 column mode for text.

There have been projects in the first year of Circuit Cellar Ink, in the
series about an automated home weather station, and in Radio-Electronics 
(December 1989).

Mark Zenier  markz@ssc.wa.com
From: chbl@sbustd.rz.uni-sb.de (Christian Blum)
Newsgroups: sci.electronics
Subject: Re: Amp for driving headphones
Date: 24 Jul 92 20:13:42 GMT
Organization: Studenten-Mail, Rechenzentrum Universitaet des Saarlandes

rwc@ius4.ius.cs.cmu.edu (Randy Casciola) writes:

> 1.  Does anyone have any suggestions on a particular IC amplifier?
>     Preferably an IC with 2 amps per package (left and right 
>     channels, ya know).

How about a member of the STK family? Example: STK463: 2x30W, 4 ohms, stereo,
DM 25 (US$ 15), 2x25 volts, thd below 0.1%.
Or TDA2002, TDA2003 (some watts, 5 or so).

> 2.  How much power is required to drive your run-of-the-mill head-
>     phones?  what is the impedance of these things (or at least a range)?

Not very much. Walkmen headphones make the hell out of 1/4 watt... and they
have an impedance in the range of 30..40 ohms.

> 3.  Can I use some standard inverting amp circuit configuration
>     (like they teach you in your kindergarten op-amp course) or do
>     I need something more fancy?

Well yes, if you use hi-power opamps. But are there any that accept supply
voltages in a range that you need to give it all to your 4 ohms speakers?

> 4.  In audio aplications like this, is the ground on the pre-amp
>     output at the same potential as the power supply for the stereo
>     ground, or is it one half the supply voltage or something like that 
>     (OK, I'm too lazy to hook a scope to it)?

Differs... some car stereos have bridged output! Connect the input of your
amplifier with capacitors if the fuse dies. However, if you use the pre-amp
output, there will be no problem with potentials.

> 5.  Can I just use the same +12v and GND to power my amp as I use
>     for the radio, or do I need dual rails?  (I guess this is related
>     to question 4).

12 volts won't suffice for high power and a 4 ohms load. +-24v or so will
do better.

> 6.  While we're on the subject of power supplies, does anyone have a 
>     suggestion for a voltage regulator for the PS for this thing?  I 
>     want to power the head unit and a four channelx 20w amp.

You needn't stabilize the power for the amps. Your amplifier at home doesn't
either.
For your radio, 2 amps will be enough. Use a LM317 or something.


Chris.
Newsgroups: sci.electronics
From: rainer@spot.Colorado.EDU (Rainer Malzbender)
Subject: Re: PC masks from a laser printer??
Organization: University of Colorado, Boulder
Date: Wed, 29 Jul 1992 03:27:00 GMT

I just received my package of "Toner Transfer System" materials from DynaArt,
and as soon as I find some time I'll report on the results, but I haven't
tried it yet. I'm posting this for general information since this seems to
be a popular topic.

The problem with most existing methods of using laser printers to make PC
boards is getting the backing material (paper, acetate film, etc.) to come
off the board while leaving the toner behind. DynaArt has supposedly solved
this problem by using a "decal" procedure where the backing is soaked off in
cold water. Apparently most of the toner stays behind, acting as a resist in
the subsequent etching step. The same materials can also be used to prepare
faceplates or other transparent artwork (in which case it really is a decal).

The company address is

	DynaArt designs
	3535 Stillmeadow Lane
	Lancaster, CA 93536
	(805) 943-4746

Note: they don't take credit cards. The cost of one package of stuff is
$9.95 - it's basically just 5 sheets of special paper, a protective sheet,
and instructions, but if it works it's well worth the price. A recent review
in Midnight Engineering had positive comments. Supposedly it can do up to
10 mil lines and spaces, which is pretty good for homebrew.

-- 
Rainer Malzbender                               This sig has no slack since I'm
Post-doc, Physics                               using it all.
U. of Colorado, Boulder (303)492-1366           rainer@shelley.colorado.edu
Newsgroups: sci.electronics
Subject: NEED INFO ON CCD CHIP (PLEASE)...
From: cwthomas@nrlvx1.nrl.navy.mil
Date: 23 Jul 92 08:01:31 -0400
Organization: NRL SPACE SYSTEMS DIVISION



	Hi;

	I would appreciate any help in finding out a source of documen-
	tation (pinout,specs) on a ccd line scanner chip manufactured
	by Matsushita Elec.corp. It has 22 Pins and the part #is MN8051.
	IS this chip similar to the Texas Instruments TC series?? 
	Any help would be greatly appreciated, Including a tel # for 
	The manufacturer. 
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
From: jwbirdsa@picarefy.picarefy.com (James W. Birdsall)
Subject: Re: Life after CDs
Organization: Green Tiger Software
Date: Mon, 27 Jul 1992 21:46:53 GMT

In article <FELIX.92Jul26082943@crowfix.com> felix@crowfix.com (Felix Finch) writes:
>I've several CDs with 79 minutes and change.  I think the limit is 80
>minutes, altho I've heard stories about companies with 2 hour CD
>formats [...]

   I've only heard of one instance of this. The source material was old
(hence mono), so the company packed ~2 hours on one CD by the simple
expedient of recording each channel separately. I.e., first you listen to
the left channel, then you go back and play the CD again listening to the
right channel.

-- 
James W. Birdsall                            jwbirdsa@picarefy.picarefy.com
Compu$erve: 71261,1731    GEnie: J.BIRDSALL2    America On-Line: GreenTiger
          "For it is the doom of men that they forget." -- Merlin
Newsgroups: sci.electronics
From: helfman@aero.org (Robert S. Helfman)
Subject: Re: SHOCKING STORIES
Organization: The Aerospace Corporation, El Segundo, CA
Date: Tue, 21 Jul 1992 16:41:48 GMT

In article <1992Jul21.153320.10560@wuecl.wustl.edu> anbo@wuee1.wustl.edu (Albrecht Jander) writes:
>A couple of years back the power feed to our house shorted to the ground
>wire, which was grounded through our water pipes.  The effect was that 
>the water in the pipes started to boil and the pipe burst.  Unaware of

Back in the late '60s, I lived in an old farmhouse in the middle of an
orange grove in Riverside County, California. The water supply came from
a 4000-gallon tank about 8 feet higher than the house (the water was
diverted from the Gage irrigation canal into the tank once a month during
the 48-hour irrigation access 'window' for that grove). Because the
'head' was so low - 8 feet doesn't buy much pressure - there was a 3/4 hp
pump and captive-air tank in the garage to boost the pressure to usable
levels.

The ground connection for the house's power feed was, of course, tied to
the cold water line at the house. Well, that cold water line ran to the
garage and the pump. During the summer, the soil in the yard was always
extremely dry, so most of the effective grounding was being
accomplished by the piping between the pump and the big tank up the hill,
which ran through the grove which has nice moist soil. 

One day, I was doing some repairs on the pump and its
motor (yeh, I had turned off the breaker), and opened the 
pipe unions that connected the pump into the
house water lines. What I had done, of course, was to de-ground the
entire house. And, worse, I was holding BOTH sides of the union while
I was unscrewing it. So I got a juicy arm-to-arm jolt. Worse yet, I
was barefooted and in shorts - this was, after all, going to be
a wet, messy job. It took me quite a few seconds to let go and I was
a basket case afterwards. Needless to say, I put a nice 8 AWG wire and
two ground clamps on that plumbing to take the pump out of the ground
path.


Newsgroups: sci.electronics
From: doug@cc.gatech.edu (Doug MacKenzie)
Subject: What is a SPI  SP7003   (40 pin DIP, 1983)
Reply-To: doug@cc.gatech.edu
Organization: Georgia Institute of Technology, College of Computing
Date: Wed, 29 Jul 1992 21:44:54 GMT

I am trying to identify a 40 pin DIP from a 1983 Televideo 950 terminal.
It is bad and the result is that the video display is messed up.  The terminal
still functions otherwise.  I haven't been able to cross reference it.  Any
leads would be appreciated.

The chip is labeled:

		SPI
	     2057800
	  SP7003-101-02
	       8308


And on the bottom:
		1472
		Korea


Thanks,

		Doug MacKenzie
		doug@cc.gatech.edu
Organization: Penn State University
Date: Wed, 22 Jul 1992 15:44:07 EDT
From: <GNR100@psuvm.psu.edu>
Newsgroups: sci.electronics
Subject: Typewriterconversion

    Hi.  I have an Smith-Corona electric typewriter that has a memory on
it in addition to the standard electric typewriter functions.  Trouble is,
I never use it because computers are so much better, being port files
and so forth.  My question is this:  Is there any way I could take
this typewriter and convert it into a daisey-wheel printer for a computer?
It seems to me that all I would have to do is add circuitry to allow
it to connect to the machine and be controlled..  It might even be easier to
start from scratch with the electronics, as all the crucial mechanical parts
are present.If anybody has any ideas, comments, hints or suggestions,
please let me know.  Thanks guys,
                          Gordon Rogers
                             gnr100@psuvm.psu.edu
From: mtalbot@physics.adelaide.edu.au (ROAD_WARRIOR)
Newsgroups: sci.electronics
Subject: Building a picture scanner
Keywords: scanner building picture
Date: 21 Jul 92 07:12:26 GMT


	I'm trying to design and build a picture scanner and was wondering if
anyone could tell me where I could find some information on the actual
scanning mechanism.  If anyone has done something like this already and is
willing to share their knowledge I would be very grateful if you would email
me at 
	mtalbot@physics.adelaide.edu.au

    If anyone knows of any related articles would you please tell me where I
could find them? 


		Thanks in advance


			ROAD_WARRIOR

--
******************************************************************************
     Even HERE they were not masters of time. Eternity, yes! But not time.
##############################################################################
From: MATGBB@LURE.LATROBE.EDU.AU (BYRNES,Graham)
Newsgroups: sci.electronics
Subject: PC masks from a laser printer??
Date: 27 Jul 92 06:50:39 GMT
Organization: La Trobe University
X-News-Reader: VMS NEWS 1.22

Dear Knowledgeable ones,
Up until now I have made my PCB's using donut and tape transfers on
overhead proj film, exposing Electrolube +ve resist on the copper.
However, as I have now entered the compuer age and bought a cheapy
PCB CAD program, I need to produce masks from a laser printer.
I tried the obvious (direct print on transparency), but the result
was sufficiently porous that the copper looked like a 1/2 tone printers plate
after etching. What should I do? I'm going to try inking over the printed
bits on the mask, but that doesn't leave me a long way in front of the 
stick on donut method.
Thanks,
Graham B
From: warren@nysernet.org (Warren Burstein)
Newsgroups: sci.electronics
Subject: Hewlett-Packard HBCS-1100
Date: 21 Jul 92 12:04:41 GMT
Reply-To: warren@nysernet.org
Organization: Mail to News Gateway at Wang Labs

I just got five of these parts, and two of HEDS-1300.  Both parts
contain a visible led and photodiode and lenses.  The HEDS-1300
producs a single point of light, but the odd thing is that the
HBCS-1100 producs two points!  I could find no mention of this in the
data sheet.  Anyone ever use one of these?
-- 
/|/-\/-\       The entire auditorium		Jerusalem
 |__/__/_/     is a very *** theft.
 |warren@      But the okra
/ nysernet.org is not all that paranoid.
From: judson@watnxt2.ucr.edu (Michael Judson)
Newsgroups: sci.electronics
Subject: Re: Airport X-Rays
Date: 31 Jul 92 01:29:33 GMT

To slightly change the subject, what affect do X-rays have on portable
computers.  I can see the implications of an X-ray affecing electromagnetic
material on the disk, but does anyone know the technical aspects?
From: dem@cs.princeton.edu (Doron Meyer)
Newsgroups: sci.electronics
Subject: Re: SHOCKING STORIES
Date: 23 Jul 92 19:07:23 GMT
Organization: Princeton University Computer Science Department
Originator: dem@elan

In my days at Middle School, I was a member of the Stage and Lighting
Crew.  We'd do the lighting from a recessed booth about halfway back
in the auditorium.

One time, during a dry run of some production, a friend was focusing an
instrument from the edge of the booth.  The light ran on 240V, had a metal
exterior, and the power cable that went into it had stripped.  He turned
the light, and the lead touched the case, which he was holding with one
hand on each side.

He was stuck to the light..  I had to pry each hand off the light, right
on the edge of the lip.. both he and I were very lucky that we didn't
fall..

He was conscious during the event, but as soon as I pried him away, he
passed out on the lip for about 15 minutes.  Very scary.

Moral: Don't EVER work with equipment that has stripped cables..
From: dana@me.chalmers.se (Dan Andersson)
Newsgroups: sci.electronics
Subject: Re: PC masks from a laser printer??
Date: 27 Jul 92 22:22:10 GMT

MATGBB@LURE.LATROBE.EDU.AU (BYRNES,Graham) writes:
: Dear Knowledgeable ones,
: Up until now I have made my PCB's using donut and tape transfers on
: overhead proj film, exposing Electrolube +ve resist on the copper.
: However, as I have now entered the compuer age and bought a cheapy
: PCB CAD program, I need to produce masks from a laser printer.
: I tried the obvious (direct print on transparency), but the result
: was sufficiently porous that the copper looked like a 1/2 tone printers plate
: after etching. What should I do? I'm going to try inking over the printed
: bits on the mask, but that doesn't leave me a long way in front of the 
: stick on donut method.
: Thanks,

Graham

Here comes a method.

There is a special transparent film for laser-printers sold here in Sweden,
that you use for PCB-making, it's probably an American product and you can also use common laser-transpars with good result...

Makre your PCB-design, be aware of the scale so that the printed transparent is
EXACTLY scale 1:1  AND a MIRROR printout.

Try to turn the tonermix adjustor so that you get a nice black printing.
Take an iron, ( not your wife's/ mum's ! ). Let it reach a temp that don't
melt the plastic translar.
Take your VERY clean virgin-PCB and put the translar on it with the carbonlayer down against the cu. Use the iron to press and heat the translar.
let the PCB and translar rest and chill. Remove GENTLY ( yes, you will need
some practice ) and voila, there is ( hopefully ) the carbon-layer
transferred to the coppersurface.
Now you can use a soft chemical like cu-oxide to process your PCB.

Don't try to large surfaces. If you need to do large constructions, try to
meke them bit by bit , by masking off with plastic tape during etching.

//Dan Andersson    dana@theta.me.chalmers.se

Newsgroups: sci.med
From: green@island.COM (Robert Greenstein)
Subject: Re: Colonic irrigations
Keywords: alt medicine
Organization: Strawman Incorporated
Date: Mon, 27 Jul 1992 19:47:30 GMT

In article <1992Jul23.013510.9589@ttinews.tti.com> hollombe@polymath.tti.com (The Polymath) writes:
  
>I find it amusing that most of the people who favor colonic irrigation
>also prattle on about naturopathic medicine and the unnaturalness of
>so-called allopathic medicine.  Off hand, I can think of few things less
>natural in terms of the body's design and intent than colonic irrigation.

I'm one of the prattlers, and I agree with you. Many of these so-called
natural healing methods are completely unnatural and unhealthy, including
colonic irrigation.
-- 
******************************************************************************
Robert Greenstein           What the fool cannot learn he laughs at, thinking
green@island.com            that by his laughter he shows superiority instead
                            of latent idiocy - M. Corelli
Newsgroups: sci.med
From: cfaks@ux1.cts.eiu.edu (Alice Sanders)
Subject: Re: Telephones and Doctors
Date: Thu, 23 Jul 1992 01:48:13 GMT
Distribution: usa
Organization: Eastern Illinois University

But don't people also assume that doctors are smart?  And sometimes being
called 'DR.' can be a benefit.  I had an experience where I was returning
something to a merchant, and someone I knew came through and said hello to
me, using the word 'Dr'.  The hassle was over.  Instead of
'Honey,...that's our policy', it was 'Dr...., I'm going to make an
exception...'.  

Depending on the kind of women you want to meet, I would think that being
considered smart would be more beneficial than being considered rich.

Alice

Newsgroups: sci.med
From: stone@cunixb.cc.columbia.edu (Glenn Stone)
Subject: Re: is sugar bad for you?
Reply-To: stone@cunixb.cc.columbia.edu (Glenn Stone)
Organization: Columbia University
Date: Fri, 24 Jul 1992 14:08:43 GMT

In article <1992Jul24.020601.15760@omen.UUCP> caf@omen.UUCP (Chuck Forsberg WA7KGX) writes:

> RTw  07/02 0755  RESEARCHERS SAY OBESITY MAY BE HEREDITARY
>
>    MELBOURNE, July 2, Reuter - Overweight people can blame fat parents, says
>an Australian medical expert.
>    "The hereditary contribution to obesity is very high. It can be as high as
>50 to 60 per cent, which means that obese people are being blamed and made to

That's a nice punchy lead-in to the story but it's inaccurate, even if
the rest of the story is right on the money.  The  parents of children
who are obese by heredity can be quite skinny but  still pass on "fat"
genes.   This happened in my  family, where two  parents who were both
thin  (at  least   until middle age)   produced a welterweight  son, a
middleweight son, and a heavyweight son.


-------------------------------------------------------------------------
  Glenn Davis Stone                                BITNET: stone@cunixf
  Columbia University            INTERNET: stone@cunixb.cc.columbia.edu
-------------------------------------------------------------------------