HDTenEightyP/NetNews huggingface dataset:
From: dagbrown@napier.waterloo.edu (Dave Brown)
Subject: Re: Life after CDs
Organization: University of Waterloo
Date: Fri, 24 Jul 1992 14:40:27 GMT

In article <5146@krafla.rhi.hi.is> einari@rhi.hi.is (Einar Indridason) writes:
>In <14mdkjINNb4m@grapevine.EBay.Sun.COM> smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC) writes:
>
>>In article <1992Jul23.041115.20377@bilver.uucp>, bill@bilver.uucp (Bill Vermillion) writes:
>
>>There is a story (probably apocryphal, anyone know?) that the 74 minutes
>>time was chosen because it was just long enough to hold the Sony MD's wife's favourite piece of classical music...
>
>I have heard that, and the classical music piece is supposed to be
>Beethoven's 9th symphony.
>
Huh?!  Beethoven's 9th is only about 65 minutes long!
(Unless the orchestra's playing really slowly :-) )

--
Dave Brown
dagbrown@undergrad.math.uwaterloo.ca
Phone: (519) 725-6896
"I believe the word you're looking for is, 'AAAARRGH!!!!'" - The Penguin
Newsgroups: sci.electronics
From: klimasewski@fccvde.enet.dec.com (My name is...)
Subject: Philips DC777,R100,AR3000
Organization: Digital Equipment Corporation
Date: 27 JUL 92 11:38:57    


Hello,

 Is anyone out there using a Icom R100 or AR2500/3000 in the car 
 for shortwave reception (3-30MHz)???

 How do you think it would compare to the Philips DC-777 car 
 stereo w/shortwave?


                                Ken
Newsgroups: sci.electronics,rec.audio,alt.folklore.urban
From: dahls@fhydra.dnet.unit.no (Joern Yngve Dahl-Stamnes)
Subject: Re: CDs, Pens and Blue Lasers.
Reply-To: dahls@fhydra.dnet.unit.no (Joern Yngve Dahl-Stamnes)
Organization: University of Trondheim, NORWAY
Date: Thu, 30 Jul 92 10:46:27 EDT

Thus spoke the keyboard of manley@optilink.UUCP (Dave Manley):
>I note that the SONY CORP. has aNNOUNCED the development
>of a BLUE LASER.  It IS ANTICIPATED the new laser will
>allow development of new CDS with TRIPLE THE CAPACITY
>of current ONES.  In preparation for delivery  of this 
>NEW technology I SEE A GREAT NEED for an AUDIOPHILE 
>QUALITY PEN to guarantee ACCURATE RETRIVIAL of this 
>data from the new format CD to insure SONIC CLARITY(tm).

The only problem with the new laser is that is have to bee kept cool - very
cool in order to work (not shure, but I thought it was around 200 Kelvin).
Not very practical.

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+-+
* I went back to my mother,           * Joern Yngve Dahl-Stamnes           *
* I said, "I'm crazy ma, help me!"    * University of Trondheim            *
* She said, "I know how it feels son, * The Norwegian Institute of Tech.   *
* 'cause it runs in the family."      * Division of Physical Electronics   *
*       - The Who, Quadrophenia       * e-mail: dahls@fhydra.dnet.unit.no  *
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+-+
From: skipa@milton.u.washington.edu (Skip Albertson)
Newsgroups: sci.electronics
Subject: HELP!! Recommendations for Satellite Dish
Summary: HELP!! Recommendations for Satellite Dish
Keywords: HELP, Satellite Dish
Date: 22 Jul 92 02:05:49 GMT
Organization: University of Washington


My Dad lives in an apartment complex with many senior citizens
and they are interested in replacing their cable TV connections
with a satellite dish.  What models should they consider and
what costs are involved (i.e. cabling etc.)?

Would this work for a group of apartments?  What limitations
would there be (i.e. co-usage, number of simultaneous channels)?

The location is on Long Island, mid-way between New York &
Boston.

Thanks in advance for your replies,

skipa@milton.acs.washington.edu
From: ivory@e7sa.epi.syr.ge.com (John Ivory)
Newsgroups: sci.electronics
Subject: FCC rules & regs
Date: 30 Jul 92 11:41:54 GMT
Reply-To: ivory@e7sa.epi.syr.ge.com
Organization: Tower Concepts


Let's pretend (:-)) that I have a small product that I'd like
to mass produce and sell.  This device is not too unlike a modem
in that it connects to the phone line, and has an internal clocking
mechanism for a low level cpu.

- What are the FCC implications involved here?
- Who do I call/write to find out?
- How long does an FCC approval process take?
- How much does it cost?
- Is it 'really' necessary?
- Where do I begin?
- What would chairs look life if our knees bent the other way?

I'll be more than happy to re-post a summary of all responses.  Thanks.


------------------------------------------------------------------------- \ \ \ 
   Tower Concepts                                          John E. Ivory   \ \
   103 Sylvan Way                                       ivory@crd.ge.com    \ \
   New Hartford, NY  13413                     ivory@e7sa.epi.syr.ge.com     \
   (315) 724-1471                                                             \
-------------------------------------------------------------------------------
Xref: sparky sci.electronics:13229 rec.audio:10782
From: ptt00@duts.ccc.amdahl.com (  179  Peter Thelen)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Life after CDs
Date: 24 Jul 92 05:31:25 GMT
Reply-To: ptt00@DUTS.ccc.amdahl.com
Organization: Amdahl Corporation, Sunnyvale CA

In article <1992Jul23.041115.20377@bilver.uucp> bill@bilver.uucp (Bill Vermillion) writes:
>
>then Sony and Philips got together and standardized on the
>current 12cm disk that sped'ed out at 74 minutes.

Does anyone know for sure the absolute maximum playing time of CDformat ?

I had always heard this 74 minute nonsense, then "Electric Ladyland" came
out on one disc at 75:25. A couple years ago I got one by the Mexican
band "Iconoclasta" that clocked in at 80:20.  What Gives ?

Does anyone know the real truth ?

peter (ptt00@DUTS.ccc.amdahl.com)
From: jkelly@oodis01.af.mil (Jerry Kelly)
Newsgroups: sci.electronics
Subject: VGA Quality Color LCD Displays
Date: 28 Jul 92 14:32:32 GMT
Organization: Hill AFB, Utah

Anyone know where I can get information on VGA quality color LCDs?
The larger the better.


thanks.

jerry kelly
jkelly@oodis01.af.mil
Xref: sparky sci.electronics:13643 rec.audio:11052 alt.folklore.urban:20163
From: bower@pecan.cns.udel.edu (Tyson Bower)
Newsgroups: sci.electronics,rec.audio,alt.folklore.urban
Subject: Re: CDs, Pens and Blue Lasers.
Keywords: Make MILLION$ with ME.
Date: 30 Jul 92 20:07:53 GMT
Distribution: na
Organization: University of Delaware, Newark

Yes, but what about the male/female/human/vulcan clause?  I think
that automatically implies discrimination against Klingons, Romulans,
and Ferengis.

I personally would recommend a purple pen.  I think it is a pretty color.
From: jrm@gnv.ifas.ufl.edu
Newsgroups: sci.electronics
Subject: "Super-CD" ... soon ?
Date: 29 Jul 92 18:38:47 -0500

Amid the moans and groans of audiophiles and some musicians over the 
less-than-perfect sound reproduced by digital methods (CDs in partic)
I have been hearing of a new device that might put an end to the
unhappiness. Apparently, a blue(ish) semiconductor laser has been
made lately. Most CD players use an infrared laser which outputs at
around 1000 nanometers. This new device hits the blue-green area of
the spectrum, around 500 nm. What this will allow is for a CD pit of
half the current physical size to be resolved, immediately doubling
the information capacity of a CD or CD-ROM. 

Higher resolution should also allow the inter-track distances to be
tightened-up. We can assume that tracking mechanisms/methods will
constantly improve so it should be no prob to cope with this. 

What all this makes possible is the "SUPER-CD". Such a unit offers three
major capabilities. Firstly, it should be able to play existing disks,
which would be no problem. Secondly, it could play disks recorded at
the current sampling rate/depth, but which contain twice (or more)
program material. Thirdly, an 'audiophile' pressing could be made that
uses the extra capacity to store music recorded at a much higher
sampling rate & depth than the current standard. This extra resolution 
should negate any difference in sound quality between  the beloved
vinyl disks of old and digital. 

Given that downwards compatibility should be easy ... I see no reason
that "Super CD" could not take-off the moment the new lasers are
availible in bulk. Given that we would also hear the end of the eternal
snobby complaining about inferior digital sound - the effort would
be well worth it. Sell the first 50,000 units at $2500 each to the
dedicated and well-financed audiophiles - and then cut the price to
$199.95 for the mass market :-)

-- Jim Mason
-- Analog must die !
Xref: sparky sci.electronics:13311 rec.audio:10832 alt.folklore.computers:11129
From: rob@wzv.win.tue.nl (Rob J. Nauta)
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
Subject: Re: Life after CDs
Date: 25 Jul 92 13:42:45 GMT
Followup-To: sci.electronics
Organization: Sex, UNIX & Rock 'n Roll

jsimon@rchland.vnet.ibm.com (Gerald Simon) writes:

>This may sound stupid but, when I look at the back side of a CD (the side
>the music is on), the light reflected back in the first part of the CD 
>(usually less than 1/4 inch from the outside) differs from the light reflected
>back from the rest of the CD.  I've always assumed that's the portion of the CD 
>where the music is recorded.  If that assumption is correct, than there is 
>a LOT of space left over for additional music over the rest of the CD....How 
>wrong am I?

>Jerry

A CD stores music from the inside to the outside ! Thus you are wrong.
This is why 3" CD's work - the player doesn't care that an unused piece
of plastic is missing, the music is on the inner circle.

Rob
-- 
/-----------------------------------------------\			   ,==.
| Rob J. Nauta, UNIX computer security expert.	| 			  /@  |
| rob@wzv.win.tue.nl, Phone: +31-40-837549	| 			 /_  <
| Feel free to email me for free advice		|			=" `g'
Xref: sparky sci.electronics:13288 rec.audio:10822
From: mxmora@unix.SRI.COM (Matt Mora)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Life after CDs
Date: 25 Jul 92 00:06:34 GMT
Followup-To: sci.electronics
Organization: SRI International, Menlo Park, California

In article <25fg02Og1bxl01@JUTS.ccc.amdahl.com> ptt00@DUTS.ccc.amdahl.com writes:

>I had always heard this 74 minute nonsense, then "Electric Ladyland" came
>out on one disc at 75:25. A couple years ago I got one by the Mexican
>band "Iconoclasta" that clocked in at 80:20.  What Gives ?
>
>Does anyone know the real truth ?

According to my CDROM handbook that describes the audio format. (based on the 
yellow book) Brian Bechtel says:

"An audio CD contains up to 74 minutes of sound. ( by decreasing the 
inter-track gap and other tricks you can put more than 74 minutes of sound
on a cd. Doing this is only marginally within the standard. Such CD's may
not be playable on all drives)."

Probably the maximum is 99 minutes 59 seconds 74 blocks and 97 frames since
the tracking system is limited to finding something on the disk in that range.

Matt




-- 
___________________________________________________________
Matthew Mora                |   my Mac  Matt_Mora@sri.com
SRI International           |  my unix  mxmora@unix.sri.com
___________________________________________________________
Newsgroups: sci.electronics
From: htoppman@cip.informatik.uni-erlangen.de (Herbert Oppmann)
Subject: Re: Life after CDs
Organization: CSD., University of Erlangen
Date: Fri, 31 Jul 1992 07:18:52 GMT

jonas@world.std.com (Jonas R Klein) writes:

>In article <1992Jul30.164545.10449@ole.cdac.com> ssave@ole.cdac.com (Shailendra Save) writes:
>>Is it possible to have the same CLV
>>for magnetic discs?  (as in the hard disks of computers?)

>As far as I know, Mac floppy disks use this method.  However, there would
>be no way to vary the peed of a hard disk fast enough to keep up with the
>position of the heads.  Drives take a few seconds to spin up to speed,
>but only, say, 20 millisecs to move the head to the other side of the platter.

Yes, it's true, the first Macs used drives with (a few) different speeds.
And its also true that you can't change the speed of a hard disk as fast
as the head moves.

But you don't need to change the speed of the mechanical parts to
achieve what you want (denser recording on the outer cylinders).
You just have to increase the data rate, so that bits are recorded more
densely. For this you only need a controller chip and drive electronic
that can handle different data rates, but the existing ones are fairly
flexible.

This method hasn't been used on older hard disks, because sector mapping
was done in the computer and it was impossible to implement this wierd
mapping in every operating system.
But it is used today with e.g. the SCSI drives, where the computer does
only a trivial sort of sector mapping and the real sector mapping happens
in the controller that is on the hard drive. Controller and hard drive
form one unit there, specifically designed to work together. So it's easy
to implement any trick you like, because it doesn't show on the outside.

To return to Macs:
The newer ones have standard floppy drives and use the method of varying
the data rate too (it's much cheaper than to use a special floppy drive).

-- 
| Herbert Oppmann | email: htoppman@cip.informatik.uni-erlangen.de |
| irc: mtx        |  mail: Drausnickstrasse 29, D-8520 Erlangen    |
From: rcaslis@hydra.acs.uci.edu (Russell Caslis)
Subject: blue LEDs
Newsgroups: sci.electronics
Organization: University of California, Irvine
Date: 30 Jul 92 16:27:48 GMT


My brother is looking for a source of blue LEDs, even if they are expensive.
I remembered the conversation here a while ago, but I never took down the
names of any of the companies.  Can someone send me in the right direction.

Thanks.


--
Russ Caslis
rcaslis@uci.edu
Xref: sparky sci.electronics:13486 comp.sys.ibm.pc.hardware:20500
From: mikey@slic.cts.com (Mike Shirley)
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
Subject: Magnetometer Impact on Floppies; was Airport X-Rays
Summary: Testing and results on Magnetometer
Date: 28 Jul 92 16:20:46 GMT
Organization: Muth Valley Seismic Control District, San Diego, CA / Node 2

carlr@netcom.com (Carl Robinson) writes:

> X-rays shouldn't bother magnetic devices (hard disks,diskettes, etc.).
> Magnetic scanners will like those hand-held scanners airport security
> personnel use when you set off the alarm.  The thingy you walk through
> is also magnetic and will hose disks.  X-rays will wipe out unexposed
> and unprocessed film. 

I'll make up a test disk today and try it out on a couple of
magnetometers and hand-held scanners.  Repeatitive passes, close
proximity to the coils.  In other words, worst case senerio.

--
     Mike, WB6WUI   //   INET:  mikey@slic.cts.com   //   GEnie: SLIC
From: max@csqx.cs.rhbnc.ac.uk (Max Van Daalen)
Newsgroups: sci.electronics
Subject: Phoneme based speach Synthesis chips ?
Date: 23 Jul 92 13:13:36 GMT
Reply-To: max@csqx.cs.rhbnc.ac.uk (Max Van Daalen)
Organization: Dept of Comp Sci, Royal Holloway & Bedford New College Uni London

-
	Can any one suggest a good speach synthesis chip that constructs words,
sentences etc. from a set of built in phonemes. All the devices on the market
seem to be of the digitize/playback variety ?

	I've been told of a company called Berkeley Speach Technoledgy, or
BEST ? (I think the E is for electronics), but I don't have any address for
them - does anyone out there know it ? possibly even an E-mail address ...

	Thanks very much, 
-
===============================================================================

Max van Daalen
Department of Computer Science
RHBNC University of London
Egham Hill
Egham
Surrey TW20 OEX

Phone  : (+44) 0784 443694
E-Mail : max@cs.rhbnc.ac.uk

===============================================================================
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
From: matthew@alchemy.tn.cornell.edu (Matthew Kleinmann)
Subject: Re: Airport X-Rays
Organization: Alchemy International
Date: Thu, 30 Jul 1992 14:00:05 GMT

Not quite.  Photographic film has resiprosity (sp).  For very low exposure levels, it takes much more time.  You are working very low on the knee of the gamma curve.


-- 
                       Alchemy International, Ithaca NY
                        matthew@alchemy.tn.cornell.edu
                         matthew@alchemy.ithaca.ny.us
                              Public Access Unix
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
From: jhansen@convex.com (James Hansen)
Subject: Re: Two-sided CD's *DO* exist! (was Re: Life after CDs)
Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
Date: Tue, 28 Jul 1992 15:48:46 GMT
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.

Michael D. Myjak writes:

>This is really nothing new... Laser Disks (grown-up CDs) have been
>double sided for a very long time now.

Laserdisks are really two single-sided disks that are glued together.

--
James B. Hansen                                  {sun,uunet}!convex!jhansen
CONVEX Computer Corporation                              jhansen@convex.com
3000 Waterview Parkway, P. O. Box 833851
Richardson, TX 75083-3851                              Phone: (214)497-4802
Newsgroups: sci.electronics,sci.materials,sci.physics,sci.engr.chem
From: MEDELMA@cms.cc.wayne.edu (Michael Edelman)
Subject: Re: PZT Excitation
Organization: Wayne State University, C&IT
Date: Tue, 28 Jul 1992 15:21:01 GMT

In article <1992Jul28.123849.20613@murdoch.acc.Virginia.EDU>
rb9a@kelvin.seas.Virginia.EDU (Raul Baragiola) writes:
 
>     [...]
>Well, the HEP are neither the first nor the main users of high magnetic
>fields and magnetic shielding.  An important area is electron spectroscopy,
>widely used for surface analysis, where you want residual fields of
>milligauss. Look at Sevier's Electron Spectroscopy for a discussion of
>this. In other applications in atomic or solid state physics
>people fields of microgauss or smaller.
>    For kGauss fields, it is better to use iron or other materials
>because Mu-metal saturates.
>
I used Mu-Metal some years back in a lab to handle a noise coupling problem.
I recall that the manufacturer recmmended alternating layers of two different
mu-metal alloys, which they referred to as "netic" and "co-netic". One had
high permeability and low saturation resistance and the other had the
opposite properties (I think I have that right!). For low gauss fields
just one layer was needed, but for high gauss fields the layering worked
very well.
-----------------------------------------------------------------
 Michael Joseph Edelman           Wayne State University
 medelma@cms.cc.wayne.edu         Computing & Information Technology
 mje@pookie.pass.wayne.edu        Detroit, Michigan
 medelma@waynest1.bitnet          (313) 577-0742
From: amconn01@ulkyvx.louisville.edu
Newsgroups: sci.electronics
Subject: Re: Airport X-Rays
Date: 29 Jul 92 17:58:02 GMT
Organization: University of Louisville

In article <Bs5s3E.68p@news.cso.uiuc.edu>, dvsg0223@uxa.cso.uiuc.edu (David Salamon) writes:> 
> I seriously doubt that there is any focussing of the eletrons at all.  I think
> there is simply a high voltage between a small hot cathode and a larger
> target.  If the target is flat (for example) and much larger than the cathode,
> then the electrons will follow the field lines and all impact roughly 
> perpendicular to the surface.  No focussing necessary.  After all, we don't
> care WHERE the electrons hit the target, just that they hit with the correct
> momentum.
> 
 
Because of electrostatic repulsion of the electron beam in an x-ray tube, the
electrons are normally focused by electrostatic means. We do care where the
electrons hit the target because this will affect the resolution of the image
produced by the x-ray beam and the heat build-up in the anode. It is true that
x rays will be produced isotropically in the target by bremsstrahlung (and to a
lesser extent by electron transitions <characteristic radiation>) but if the
target is angled self-absorption in the anode will produce a useful beam in the
desired direction.

Michael Connor/Castigat rideno mores!
From: u_banzai@mcl.ucsb.edu (Buckaroo Banzai)
Newsgroups: sci.electronics
Subject: AC-Regulator exists(?) for 12VAC Halogen Lamp
Summary: I'm trying to fix my halogen lamp so it doesn't dim or strobe.
Keywords: Halogen AC Regulator
Date: 22 Jul 92 02:00:34 GMT

I have a 12VAC Halogen desk lamp that loves to flicker and dim a lot.

I recently opened up the base which had a 110<->12VAC transformer, a three-way
rocker switch (it has two brightness levels, and off)

The secondary outputs go either center tapped, for dim or full(?) tapped for
brighter.

I'm wondering if there's a capacitor/choke/coil combination or AC line
regulator for the low-voltage AC side.

Any info on usage, sources, or helpful hints would be great.
--
=  Marc Tamsky    u_banzai@mcl.ucsb.edu    KB6JWE  =
Newsgroups: sci.electronics
From: MrEd@GreenAcres
Subject: Re: Radar Detectors, and Radar Detector Detectors and TVs
Organization: McGill University
Date: Fri, 24 Jul 1992 04:58:05 GMT

In article <1992Jul23.204831.28487@news.columbia.edu>  
gmw1@cunixa.cc.columbia.edu (Gabe M Wiener) writes:
> 
> The BBC does this in the UK with detector vans.  I remember when I was a kid
> and someone told me that in England you need to have a license to own a TV
> set, and I said, "Oh gimme a break.  What do they do, drive around in little
> vans to see who's paid their TV bill?"  And it wasn't until I went there
> for the first time that I learned that that's exactly what they do!
> 
yes, but they don't just drive round aimlessly. Firstly, I believe if s store  
sells a TV set in England, they have  to notify the authorities who they sold  
it to and give them an address - and you can bet that if the buyer doesn't buy  
a licence, they'll have detector vans outside their door fairly soon.
Secondly, they check on people who don't renew their licences. 
Let your licence expire and pretty soon you'll have vans cruising your street.

BTW can they differentiate between black & white and colour sets ? - a b&w  
licence used to cost a lot less than a colour one, and I'm curious as to  
whether buying a b&w licence would be enough to keep them off your back
From: pdg@math.uiuc.edu (Paul Grayson)
Newsgroups: sci.electronics
Subject: Selling Cheap PC
Date: 28 Jul 92 16:57:50 GMT
Article-I.D.: news.Bs3z4F.n4t
Organization: University of Illinois at Urbana


  My friend asked me to post this:

  He is selling an 100% IBM compatible and a 9 pin OKIDATA printer:
-8088 4.77 Mhz
-dual 5.25" 360K floppy drives
-very good cga moniter with card
-game port
-No Hard disk

$200 or best offer

                        -Josh

Email me (Paul Grayson) for offer or more info.

---------
Paul
  Grayson
---------
Newsgroups: sci.electronics
From: klp@doe.carleton.ca (Ka Lun Pang)
Subject: Underground CD copying
Organization: Dept. of Electronics, Carleton University
Date: Tue, 21 Jul 1992 21:09:34 GMT


Hi folks,

More than one person have told me that some crooks have been making illegal 
copies of CDs. And one told me that those CDs are worse in fidelity.

I don't know the details of making a CD but as I understood, there are 
micro hills and valleys representing 1's and 0's. Now if the bad guys have
the technology of manufacturing CD, which part(s) of the process they can't do
perfectly to cause degradation in fidelity?

Anyone knows if there are REALLY illegal CDs on the market and if so, how do
they different from the REAL CDs?

Thanks

K.L. Pang