HDTenEightyP/NetNews huggingface dataset:
From: fculpepp@norfolk.vak12ed.edu (Fred W. Culpepper)
Subject: Re: 0.100" spacing
Organization: Virginia's Public Education Network (Norfolk)
Date: Sun, 26 Jul 92 19:48:25 GMT

adw@cci632.cci.com  writes:
> 
>  Thanks to all who replied to my question of the green solder mask. The
> green stuff is silkscreened and isn't really necessary for homebrew
> circuit boards. However, several varnishes exist that will insulate the
> board. One of them is a red varnish from GC Electronics, and other kinds
> are clear and comes in a spray. Radio Shack doesn't sell something like it
> so you will need to look elsewhere.
> 
> 
>  Now, I have another question! Previously, I've been drilling holes for my
> IC's with a drill press, which isn't so bad for the small 16 pin IC's.
> I can usually eyeball where the drill press will drill with reasonable
> accuracy, and any variation can be compensated by bending the pins of the
> IC socket or IC to fit.
> 
>  However, I have a 64 pin IC that I want to put on a circuit board. I don't
> wish to have to get a stronger eyeglass prescription after drilling the holes.
> So does anyone have any techniques or equipment that they use to drill these
> types of things?
> 
>  My fantasty drill press accessory is a X-Y sled that fits on the bench of the
> drill press. This sled would have clips that my circuit board attaches to. When
> I twist some screws, the sled locks, and when I push it in an X or Y direction,
> it clicks and locks at every 0.100". Does such a thing exist, or will someone
> take this idea, make a fortune selling these sleds, and give me a free sled
> in exchange?
> 
> 
>  Any tips or pointers would be deeply appreciated.
> 
>                                                               Derrick

Derrick,

	Radio Shack has an answer to your problem (or rather it
does for me).  I purchased a pre-drilled circuit board to use
as a template.  First step is to used the template to mark the
positions of the holes where wanted.  Second step, use a
*small* center punch and tap it slightly to produce a dimple in
the surface of the copper foil.  Third step, use the drill.

	The dimple will guide the drill to the proper
position.  It may take a bit of practice to discover how much
hammer blow will produce the optimum dimple.  But it works and
the results are a neat line of propely positioned holes.


Fred Culpepper

fculpepp@norfolk.vak12ed.edu
-- 
Newsgroups: sci.electronics
From: savage@artofnoise.rtp.dg.com (Ed Savage)
Subject: Re: HC16 Toolkit Rebate
Date: Thu, 30 Jul 92 17:04:29 GMT
Organization: Data General Corporation, RTP, NC.

In article <2A739C48.12602@noiro.acs.uci.edu> gkwan@balboa.eng.uci.edu (Greg Kwan) writes:
>Does anyone know the expiration date for applying for the rebate?
>Originally it was 16.MAY.92, but since they had supply problems,
>Motorola extended it. (I didn't receive my kit until last month.)

In one of the papers I received with the package, it mentioned some date
that was in early October. 

>Also, does anyone know how picky Motorola is on the correct an-
>swers? I'm pretty sure my program is working, but just as I was
>checking the actual dB levels, my signal generator took a dump.
>(ok, I might have inadvertently shorted it out--cheap home brew
>stuff :-(

Don't know.  I haven't started the project yet.

>greg
>
>gkwan@balboa.eng.uci.edu


Edward Savage				DG/UX Development
Data General Corporation                savage@dg-rtp.dg.com
62 T. W. Alexander Drive                {backbone}!mcnc!rti!dg-rtp!savage
Research Triangle Park, NC 27709        (919) 248-6207
Newsgroups: sci.electronics,sci.materials,sci.physics,sci.engr.chem
From: mece1xg@menudo.uh.edu (purna)
Subject: magnetic insulators and shape-memory alloys (was Re: PZT Excitation)
Organization: Dept. of Applied Alchemy, Univ. of Houston
Distribution: na
Date: Mon, 27 Jul 1992 19:22:08 GMT

In article <1992Jul27.185909.19949@pbhyg.PacBell.COM> rhsomer@PacBell.COM (Bob Somers) writes:
> Is there any material that acts as an insulator
>from magnetic forces?  I was told some time ago
>that there is none, but perhaps some new material
>will do this.
>	Bob Somers, Pacific Bell, 510-823-9010
>
howdy!

this is from memory, but......i beleive that there is a material
called mu-metal which acts as an insulator from magnetic fields.
also, a lot of the amorphous metals (aka metglass) are used for
magnetic shielding.  if you need more, e-mail me and i'll try
and dig up my old info on these materials.

on another note....is there any new work being done on shape-memory
alloys?  i did a paper on this a few years ago, but i haven't seen
anything new since then.  

peace,
-purna

Newsgroups: sci.electronics
From: rex@cs.su.oz.au (Rex Monty di Bona)
Subject: Re: uv watch
Reply-To: rex@cluster.cs.su.oz (Rex Monty di Bona)
Organization: Basser Dept of Computer Science, University of Sydney, Australia
Date: Wed, 29 Jul 1992 04:30:58 GMT

In article <1992Jul27.212631.854@odin.corp.sgi.com> adams@chuck.dallas.sgi.com (Chuck Adams) writes:
% has anyone seen the uv meters used by radio/tv stations they use
% to measure uv radiation on sunny days to warn sun bathers of radiation
% levels, i.e. 15 minutes to serious sunburn for fair skinned individuals?
% looks like one or more individuals could get rich by making version (cheap)
% to sell with your sunscreen for the beach.  my idea and my patent pending.

Nope, been done before. personal uv meters were available here, where we
get a LOT of sunburnt visitors each year. No patent - prior art.
--
Rex di Bona (rex@cs.su.oz.au)		 Penguin Lust is NOT immoral
From: irac@yang.earlham.edu (Ira Carmel@Waycoolone)
Newsgroups: sci.electronics
Subject: Re: SHOCKING STORIES
Date: 20 Jul 92 20:55:40 GMT
 <1992Jul19.150630.24771@uhura.neoucom.edu> <1992Jul20.014359.13521@trl.oz.au> <7478@public.BTR.COM>
Organization: Earlham College, Richmond, Indiana

I have never really had any seriously large electrical shocks, but I had a very
scary shock when I was about 14. No one was home and I was in the kitchen. I
had been washing my hands and while holding onto the faucet pipe, I started to
open the fridge- The wall current decided that I was a great path to the earth
and I stood there jiggling. All these awful thoughts were running through my
head... like 'am I gonna have a heart problem here soon?'.. and 'why isn't
there anyone home?'. I was grasping both the faucet and the fridge and the
pulses were of course screwing with my motor skills- I couldn't let go at all..
so I stood there and thought morbid thoughts for a bit and jiggled.. I somehow
managed to wrench myself free (I don't know how, I think I was falling
backwards.) and I sort of slumped against the counter behind me. I don't trust
large cooling devices to this day. I don't think I have any scars, but I felt
very week for about an hour.  

-ira

/{It is ok that you are all figments of my overtaxed imagination.  }?
/{Then again maybe I'm not that creative. 			   }?
/{E-mail for questions about it all to IRAC@yang.earlham.edu       }?
Newsgroups: sci.electronics
From: johnh@macadammq.edu.au (John Haddy)
Subject: Re: Dallas Video on Demand Test
Organization: Macquarie University, School of Mathematics, Physics, Computing and Electronics
Date: Wed, 29 Jul 1992 22:33:35 GMT

In article <l7a0qvINNr7m@appserv.Eng.Sun.COM>, bender@oobleck (Duke of Canterbury) writes:
|> klopfens@andy.bgsu.edu (Bruce Klopfenstein) writes:
|> : 
|> : According to the 13 July 1992 issue of TELEVISION DIGEST,
|> : USA Video wants to test a video-on-demand service this fall
|> : "using one of Southwestern Bell's 2 fiber testbed communities
|> : outside Dallas."  The technology was tested in SW Bell's lab
|> : in St. Louis in June.  A compressed movie can be delivered to
|> : the home in 3 1/2 minutes using the "equivalent of less than
|> : 10 standard video channels for rapid delivery."
|> 
Note the above line! 10 standard video channels, not telephone channels.

|> How is this possible?  Didn't we learn on the net last month that it is
|> theoretically impossible to transmit a full motion video signal over
|> telephone facilities because the SWR would cause the television receiver to
|> explode into oblivion :-)?
|> 
|> Well, didn't we?
|> 
|> mike

Modern codec technology obviously plays a big part. Somebody else on the net can
probably provide up-to-date information on the magnitude of compression being
achieved.

Most likely, the first quoted word, "equivalent", is the key here. I can't
imagine a new major research effort such as video-on-demand locking itself into
ancient technology i.e. analogue transmission.  More likely, the system would
use channel aggregation techniques on multiple digital channels.

The quotation states the use of SW Bell's fibre testbed communities - does
anybody in networld know how old these are? If they're more than a couple of
years old then they may well be broadband FDM analogue fibres. If they are
younger, there's a great chance that high speed digital links are in use.

----------------------------------------------------------------------------

      |  _  |_   _   |_|  _   _|  _|              Electronics Department
    |_| (_) | | | |  | | (_| (_| (_| \/           School of MPCE
    ---------------------------------/-           Macquarie University
                                                  Sydney, AUSTRALIA 2109

    Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983

----------------------------------------------------------------------------
Newsgroups: sci.electronics
From: Josef Moellers <mollers.pad@sni.de>
Subject: Re: SCART...what is it.
Date: Fri, 24 Jul 1992 07:10:21 GMT
Organization: Siemens Nixdorf Info.Sys. AG, Paderborn, Germany

In <14btu5INN4fe@grapevine.EBay.Sun.COM> smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC) writes:

>In article <1992Jul19.091311.26741@cs.mcgill.ca>, mingmar@cs.mcgill.ca (Ming MAR) writes:
>	> In <1992Jul17.114450.10546@lmpsbbs.comm.mot.com>
>	> michaelr@ecs.comm.mot.com (Michael Roetzer) writes:
>	>  
>	> >SCART:  "Syndicat des Constructeurs d'Appareils Radio recepteurs
>	> >et Televiseurs". a french society for ??
>	>  
>	> Syndicat is French for labor union.
>That's one of it's meanings, but it also means "Syndicate" in most of the
>English senses of that word. It can (and does in the case of SCART)
>mean an employers federation, i.e.
>"Federation of Radio and Television Equipment Manufacturers", analagous to
>BREMA in the UK, the US probably has one too.

So it's actually a FRTEM-Connector? (Now all I have to do is get my
tongue untwisted B-{)
-- 
| Josef Moellers		| c/o Siemens Nixdorf Informationssysteme AG  |
|  USA: mollers.pad@sni-usa.com	| Abt. STO-XS 113	   | Riemekestrasse   |
| !USA: mollers.pad@sni.de	| Phone: (+49) 5251 835124 | D-4790 Paderborn |
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
From: dap@portal.vpharm.com (David A. Pearlman)
Subject: Two-sided CD's *DO* exist! (was Re: Life after CDs)
Organization: Vertex Pharmaceuticals, Inc.
Date: Mon, 27 Jul 1992 18:21:47 GMT

In article <27JUL199209444686@erin.caltech.edu> shoppa@erin.caltech.edu 
(TIM SHOPPA) writes:
>In article <1992Jul27.092328.21478@discus.technion.ac.il>, 
sorin@techunix.technion.ac.il (Goldenberg Sorin) writes...
>>Somehow the cd manufacturers seem to squeeze more music into the c.d.
>>I have Mahler 2.nd with Klemperer - above 79 min.
>> 
>	I remember from articles in Radio-Electronics etc. when CD's were new,
>some mention of the spiral-tracking technology, something about guard tracks
>on the outside of the data that helped keep the servos locked on as the music
>played.
>	Also, I believe the same article pointed out that music *could* be
>recorded on both sides!  Has anyone actually seen this done?  It would mean
>that program information (and the trendy art designs) we are used to would
>be non-existent or in the very center circle of the CD.
>

Yes, Polygram recently issued a promo-only CD single that features music
on both sides (one side features a track from A Man Called (E); the second
side features a track from Shakespeare's Sister). The minimal information 
printed on the CD is confined to the blank space around the spindal hole.
I'm not sure how they manufactured it.

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). 

dap

-- 
=============================================================================
    David A. Pearlman

Vertex Pharmaceuticals Inc.                     email: dap@vpharm.com
Newsgroups: sci.electronics
From: charles@zip.eecs.umich.edu (Charles Jacob Cohen)
Subject: No Code Technitian License (attn: HAM radio)
Organization: University of Michigan EECS Dept., Ann Arbor, MI
Date: Mon, 27 Jul 1992 13:50:20 GMT

Does anyone know of a phone number (in the US, but preferably in 
Michigan) for the Amature Radio Relay League or the equivalent
so I can figure out how to apply for a No Code Technition License?
Please post here or e-mail me at the above address 
(charles@caen.engin.umich.edu).  Thanks! - Chuck


-- 
"I do not feel obliged to believe that same God who endowed us with sense,
reason, and intellect, had intended for us to forgo their use." - Galileo
"I'm an engineer, not a dictionary!" - Me
Xref: sparky sci.electronics:13303 alt.folklore.urban:19774
From: lordSnooty@cup.portal.com (Andrew - Palfreyman)
Newsgroups: sci.electronics,alt.folklore.urban
Subject: Re: SHOCKING STORIES
Date: Sat, 25 Jul 92 02:50:04 PDT
Organization: The Portal System (TM)
Distribution: world

reading about step charges once, I walked away taking _tiny_ steps.  There was
a police cruiser at the other end of the street parked across the street until
the electric co. got there and took care of it.  Stupid cop made no effort to
keep people coming the other way out of danger.

-Mike

	i guess you have cops all figured out..
	welcome to the real world.
	in your next life, you will be told
	what turns cops on.
	
	now back to our regularly scheduled democracy.
 --------------------------------------------------------------------------
| lord snooty @the giant | how DARE they cancel Dennis Miller?             |
| poisoned electric head |                               andrew palfreyman |
 --------------------------------------------------------------------------
Newsgroups: sci.electronics,rec.audio
From: tmkk@uiuc.edu (Khan)
Subject: Re: Life after CDs
Organization: University of Illinois at Urbana
Date: Mon, 27 Jul 1992 17:41:55 GMT


In article <1992Jul23.041115.20377@bilver.uucp> bill@bilver.uucp (Bill Vermillion) writes:
>In article <Brr3A6.5IA@news.cso.uiuc.edu> tmkk@uiuc.edu (Khan) writes:
>>
>>In article <1992Jul20.192541.1069@access.usask.ca> choy@skorpio.usask.ca writes:
>>>CDs are obsolete. What comes next?
>
>>Hmm... Well, LDs are 12" (like records) and analog (like records)...
					      ^^^^^^
>>Maybe the next generation is a 12" sound-only analog LD. Surely this
						^^^^^^

>Sony came up with the idea of digitally encoding audio and put
			       ^^^^^^^^^
>it on a disk to be read by a laser.

[...]

>So - the 12" laser read multi-hour-play disk has been thought
>of and discarded for marketing reasons.

Er, the 12" laser read multi-hour-play DIGITAL disk has been discarded.

;-)
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Re: Why does my halogen lamp dim or strobe?  (was: AC-regulator...)
Date: 25 Jul 92 18:52:17 GMT
Organization: Kernel Mode Consulting, San Diego, CA

In article <u_banzai.711770434@mcl>, u_banzai@mcl.ucsb.edu (Buckaroo Banzai)
 writes:
> 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.

I would look for a much more mundane explanation:  Your switch contacts or
the bulb contacts are probably going bad.  

	--- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
Internet:  jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
Uucp:  ...{crash,eisner,uunet}!cmkrnl!jeh
From: tsjoit@htsa.aha.nl (T. H. Tsim)
Newsgroups: sci.electronics
Subject: How can I make RF-coils
Date: 26 Jul 92 15:23:58 GMT
Organization: Algemene Hogeschool Amsterdam, The Netherlands


 
Hi! Dear netters !
 
In order to construct a RF-mixer oscillator, I need some info concerning
RF inductivity-coils. You know, those small copper cans, which contains a
plastic winding body and a turnable ferrit core.
 
Could someone please tell me how to design such a device ? What kind of
calculations should be made on diameter, wire thickness, ferrit length etc etc
 
I searched allready in my personal library, but could find much about this
topic.
 
The mixer I am making is tranfering 38.9 Mhz signals down to standard 10.7 Mhz,
so I need to make an oscillator of 28.2 Mhz or 48.6 Mhz to make that possible.
So far I didn't succeed in doing so with standard (Neosid) coils...
 
All suggestions are welcome...Thanks in advance!
 
 
Newsgroups: sci.electronics
From: cab@col.hp.com (Chris Best)
Subject: Re: Airport X-Rays
Date: Wed, 29 Jul 1992 15:57:03 GMT
Organization: your service

Another data point -

I have sent a running camcorder through an airport x-ray machine,
and watched the tape later.  The tape was fine, with no apparent
effects.
Newsgroups: sci.electronics,rec.video
From: johnh@macadammq.edu.au (John Haddy)
Subject: Re: Optically scanned TV (was Re: Blue Lasers)
Organization: Macquarie University, School of Mathematics, Physics, Computing and Electronics
Date: Tue, 28 Jul 1992 23:00:43 GMT

In article <1992Jul28.123009.2910@ucsu.Colorado.EDU>, weverka@spot.Colorado.EDU (Robert T. Weverka) writes:
|> In article <1myx_6m@rpi.edu> ncc1701@acm.rpi.edu writes:
|> >tmkk@uiuc.edu (Khan) writes:
|> >
|> >>I heard a brief tidbit in one of the popular media about (IBM?)
|> >>inventing a blue laser, 

... [stuff deleted]

|> >
|> The Argon Ion laser is often used for blue.  One watt of optical power
|> for onley $20,000.
|> 
... and with only 0.01% efficiency, expect large electricity and water supply
bills. (:-)

However, Ar+ lasers have dominant lines ranging from 454.5nm to 528.7nm. This
range is not really "Blue". True blue is around 430nm. The shoreter wavelengths
can be achieved with Ar++ (which is really in the near UV at 351.1nm and
363.8nm), Cd+ (441.6nm) and Sr at 430.5nm.

The quality of colour of a Sr laser has to be seen to be truly appreciated!
Unfortunately, our He-Sr laser, being recombinant in operation, will only work as
a pulsed source (5-10kHz). For projection TV use, this forms a slight problem -
not fast enough to display 1 pixel per pulse, and pulse durations too short to
display sections of a picture frame.



--------------------------------------------------------------------------------
|					#				       |
|	johnh@mpce.mq.edu.au		#    School of Mathematics, Physics,   |
|					#        Computing & Electronics       |
| John Haddy	ph  61-2 805 8959	#     Macquarie University NSW 2109    |
|		fax 61-2 805 8983	#              AUSTRALIA               |
|					#				       |
|				        =======================================|
| Electronics Technical Services Group    <=TDM=>    High Speed Networks Group |
|                                            V                                 |
| Commonwealth Government Special Research Centre for Lasers and Applications  |
--------------------------------------------------------------------------------
Newsgroups: sci.electronics
Subject: PADS PCB
From: irie@husc9.harvard.edu (Robert E. Irie)
Date: 30 Jul 92 18:01:20
Distribution: sci
Organization: Harvard Arts and Sciences Computer Services, Cambridge, MA

I missed the discussion on this program, and am stuck right now.

I got the three zipped files (pads pcb, pads logic, pads lib) from 
an ftp site and they unzipped fine. I tried copying the relevant 
files to three separate disks and ran pinstall, but it complained
that the file could not be found when it started copying onto
the hard drive. 

I put all the files in one sub and ran padpcb or something, and it
started to "explode" and "unshrink" some files, but it still wouldnt
run, saying that the proper directories had not been created and a necessary
file could not be found. 

HAs anyone gotten the shareware pads program from ftp sites (Mine was
on rigel.acs.oakland.edu) to work? Please help!

Robert
--
File: AW esome .sig            REVIEW/SEE/ADMIRE              Escape: Reality
=====|====|====|====|====|====|====|====|====|====|====|====|====|====|====|=
Robert E. Irie                                         irie@husc9.harvard.edu
EE Major, Harvard College                              irie@husc9.bitnet
-----------------------------------------------------------------------------
Type mail or use rn commands          Line     Column    8M, 20Mhz CPU Wanted
Newsgroups: sci.electronics
From: alcuew@meaddata.com (Alcue Williams)
Subject: Books
Organization: Mead Data Central, Dayton OH
Date: Thu, 30 Jul 1992 13:30:11 GMT
Distribution: sci.electronics

Hello,

I am not sure if this is the correct news group to ask this question.  If not,
my apologies in advance.

I am interested in the names of good introductory books that deal with 
programming single board computer and their use with things like reading 
temperature, controlling stepper motors, etc.

Any help would be very much appreciated.


Thanks,

Alcue

 ____________________________________________________________________________
|                                                                            |
|          Alcue Williams III - Product Certification Engineering            | 
|          Mead Data Central                  alcuew@meaddata.com            | 
|          P.O. Box 933                     uunet!meaddata!alcuew            |
|          Dayton, OH 45401                   (513) 865-1252                 |  
|____________________________________________________________________________|
|                                                                            |
| "We trained hard,  but it seemed that every time we were beginning to form |
| up into teams, we would be reorganized.  I was to learn later in life that |
| we tend to meet any new situation by reorganizing;  and a wonderful method |
| it can be for creating the illusion of progress while producing confusion, |
| inefficiency, and demoralization."      -Petronius Arbiter, 210 BC         |
|____________________________________________________________________________|
Newsgroups: sci.electronics
From: jna@geech.gnu.ai.mit.edu (John cooked and ate an aardvark)
Subject: Re: SHOCKING STORIES
Organization: /home/fsg/jna/.organization
	<1992Jul19.150630.24771@uhura.neoucom.edu>
	<1992Jul20.014359.13521@trl.oz.au> <7478@public.BTR.COM>
	<YeOj6aG00VI=J2dJ06@andrew.cmu.edu>
Date: Tue, 21 Jul 1992 08:17:08 GMT

Okay, so probably the worst shock I've ever gotten is from a 10mW He-Ne Lazer
power supply.. let's figure 2500V at .5mA .. I saw pink for two hours..
 
--John
--
.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,,.,.,
 John Adams || jna@gnu.ai.mit.edu || jna@silver.lcs.mit.edu
'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'
 BellNet:[617] 266-4088                    Boston, MA (USA)
-------------------------------------------------------------
---------------let-the-music-into-your-mind------------------
Xref: sparky sci.electronics:13616 rec.audio:11035 alt.folklore.computers:11499