HDTenEightyP/NetNews huggingface dataset:
From: iisakkil@vipunen.hut.fi (Mika Iisakkila)
Subject: Re: A construction question about front panels for home-brew projects...
Organization: Helsinki University of Technology
	<1992Aug21.123114.8007@cbnewse.cb.att.com>
Date: 22 Aug 92 00:47:47

parnass@cbnewse.cb.att.com (Bob Parnass, AJ9S) writes:
>I use a Brother P-Touch labelmaker to make labels for my electronics
>equipment.

I've seen some pretty good looking front panels being made by stuffing
adhesive transparencies into a laser printer. You can use your
favourite CAD or drafting program to get the texts at exactly right
places. If the front panel is susceptible to wear, add another blank
sheet on the top to protect the printing. Be sure to get the type of
transparencies that will not melt in the printer (photocopy
resistant); at least Xerox makes them, probably 3M too.

The front panels will look very professional (until someone scrapes
them, that is). Of course this will not work for dark-coloured panels.

--
Segmented Memory Helps Structure Software
Newsgroups: sci.electronics
From: Robert_La_Ferla@hot.com (Robert La Ferla)
Subject: Laser Cutting
Keywords: laser
Reply-To: Robert_La_Ferla@hot.com
Organization: Hot Software
Date: Mon, 17 Aug 1992 16:34:30 GMT

I am looking for companies who perform low-cost laser cutting of metals in both  
small and large quantities.  Please respond by e-mail.

Thanks,
Robert
Newsgroups: sci.electronics,rec.radio.amateur
From: n1gak@netcom.com (Scott Statton)
Subject: IMTS Telephony (saga)
Date: Mon, 17 Aug 92 05:40:23 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Summary: ANI Spill
Followup-To: poster
Keywords: IMTS Telephone Mobile

Greetings,

@SAGA ON
I recently inherited a pair of IMTS mobile telephones.  For those who
don't know:  IMTS is the predecssor to Cellular in the United States.
VHF (155.x Mhz) and UHF (45x.x Mhz) and relatively high power.  It's
only serious drawback was the small number of channels available.  11
VHF frequencies, and roughly the same number of UHF frequencies.  Since
those were shared over a very large geographic area, contention was, shall
we say, heated.  So - great thing - Cellular Telephones are invented and
sell and everybody who hated not getting a channel moved over to AMPS and
got crappy signal quality - handoffs to /dev/null and really much cheaper
service.  Even Better Thing:  Now, with all the yuppie-scum moved up to 
900 Mhz, IMTS is wide open.  Nice loud signals, no handoff troubles, and
no waiting for dial tone.  
@SAGA OFF

Serious question:
	Does anyone know the signalling format for the ANI spill at
the beginning.  This is only a curiosity question.  I worked for a company
that made IMTS phones back in high-school, but I worked on user-interface
stuff, and never needed to know the signalling behind it.  

Other serious question:
	What was the origin of the alpha codes for the frequencies,
and what is the translation table to the numeric channel numbers?

P.S.  If anyone needs to know how to program the PROM for the Harris 1555,
I've done it.

Thanks in advance,
		Scott
From: cornhead@netcom.com (Jeff Miller)
Newsgroups: sci.electronics
Subject: What is state-of-art in CD quality AD Converters?
Date: 19 Aug 92 22:13:31 GMT
Followup-To: poster
Organization: Netcom - Online Communication Services  (408 241-9760 guest)


I am finally getting serious about building a multi-track direct-to-disk 
recording system. Which is to say I finally have the money.

When I looked into this about two years ago, the hottest thing seemd to be 
the delta-sigma stereo converters offered by Crystal Semiconductor. For 
$200 you could get a board which took stereo in and dropped 16 bit wide 
samples off the back. The delta-sigma technique made input anti-alias 
filtering trivial. The chip itself was $100.

In the meantime I am sure better things have been introduced, most likely 
by other companies. I haven't kept up with the trade publications like I used 
to so am not aware of what has been going on. 

I am interested in CD quality, 18 bit studio quality, and DAT or variable 
rate ADC's and DAC's. Evaluation units (like the Crystal board) would be 
nice but not strictly necessary. Serial or parallel output is fine.

If you know of any companies offering hot ADC or DAC products, zip 
me a telephone number, maybe a part number, won't you? I'll 
definitely summarize and post.

Thank you.

-cornhead
From: kolstad@cae.wisc.edu (Joel Kolstad)
Newsgroups: sci.electronics
Subject: Re: Solder melting point (was Re: How hot can the 486-50 cpu run ?)
Date: 21 Aug 92 15:26:40 GMT
Organization: U of Wisconsin-Madison College of Engineering

In article <1992Aug21.121702.1075@csqx.cs.rhbnc.ac.uk> adrian@csqx.cs.rhbnc.ac.uk (A Johnstone) writes:
>
>A collegue of mine has suffered from a bipolar device that disppitated 7W and
>thus detached itself from the board by melting the solder...

Oh oh.  Maybe I should stop making rack panel boxes that have the circuit
board end up upside down, huh?
Newsgroups: sci.electronics
From: ken@syd.dit.CSIRO.AU (Ken Yap)
Subject: Re: Electric Blankets and Sterility
Followup-To: /dev/null
Summary: joke
Keywords: Electric Blankets Sterility
Organization: CSIRO Division of Info Tech, Sydney, Australia
Date: Thu, 20 Aug 92 06:59:42 GMT

Is the sterility because the people on the blanket feel warm enough to
not need to get closer to their partner? :-) :-)
From: markz@ssc.wa.com (Mark Zenier)
Newsgroups: sci.electronics
Subject: Re: "Chip chat" AY-3-1015
Date: 21 Aug 92 01:31:39 GMT
Organization: SSC, Inc.,  Seattle, WA
X-Newsreader: Tin 1.1 PL3

frank@rover.uchicago.edu (Frank - Hardware Hacker - Borger) writes:
: In article <10666281.14.714208429@eng2.eng.monash.edu.au>, 10666281@eng2.eng.monash.edu.au (KEVIN PRATER) writes...
: >I ve just dug out an old project for an xy plotter
: >from electronics and wireless world dec 1984.
: >It had a chip marked AY-3-1015 which they said was a uart chip.
: >can I substitute a NS16450 at uart for this?

No.

: 	Just about any of the common 40-pin uarts will match.

UARTS were never common, being made by the smaller stranger semiconductor
companies.  The 6402 from Intersil and Harris should work.  Standard 
Micro[systems?] and Western Digital are other companies to check out.

Active Electronics still has both some GI parts and 6402's in their 
last catalog.

Mark Zenier  markz@ssc.wa.com  
Newsgroups: sci.electronics
From: etxansk@garbo.ericsson.se
Subject: Beginners Question: RAS, CAS, and Refresh?
Originator: etxansk@garbod20
Organization: Ericsson
Date: Tue, 18 Aug 1992 09:48:55 GMT

 I've been looking at chip descriptions for some common
memory circuits. 

 There are pins on them named RAS, CAS, and Refresh. I know
it's basic knowledge, but I'm not sure where to find good
documentation on this.

 The RAS and CAS signals are probably input signals to the
chip used during addressing. I've assumed that they're used
to tell the chip whether it's the most or least significant
part of the address vector that's currently on the address
bus. If I'm right about this, how come there are _two_
addressing control signals?

 For the Refresh signal: I can't recall if this one really
is a pin on the chip or if it's some event that's done with
other signals. I've heard that certain types of chips need
this signal in order to work properly. What is the CPU (or
the main clock, or the addressing logic) supposed to do to
give the memory chips the refresh?
 
 Anders Skelander
From: mjohnson@netcom.Netcom.COM (Mark Johnson)
Newsgroups: sci.electronics
Subject: Re: class D amps
Date: 17 Aug 92 20:32:18 GMT
Organization: Netcom Online Communications Service

In article <1992Aug17.170921.1628@imax.imax.com> dave@imax.imax.com (Dave Martindale) writes:
   >Circuitry to convert 16-bit data at 44.1 kHz to digital data at about
   >1.5 MHz is readily available - that's exactly how the "1-bit" DACs
   >work.  Whether you could build a class-D power amp that would amplify
   >this signal without radiating RF all over the place is another question,
   >but if you could, it would eliminate analog stages entirely.  And it
   >would be efficient.

And you would have a set of large-amplitude rectangular pulses,
which would need to be bandlimited (dare I say, filtered) before
presenting them to the loudspeaker voicecoils.  The output
impedance of this contrivance needs to be quite low or else the
damping factor will suffer.
Newsgroups: sci.electronics
From: dmfry@argo.acs.oakland.edu (Dave Fry)
Subject: source and sink circuits
Reply-To: dmfry@argo.acs.oakland.edu
Organization: Oakland University, Rochester, MI
Date: Wed, 19 Aug 1992 01:22:52 GMT
From: demcma@bb1t.monsanto.com
Newsgroups: sci.electronics
Subject: ADDENDUM--Help with remote. . .
Date: 12 Aug 92 11:24:47 CST
Organization: Monsanto Company, St. Louis, MO

I forgot to ask, would it help to supply a little higher voltage (currently 6V)
to the transmitter?

Dudley McMackins     demcma@bb1t.monsanto.com
Newsgroups: sci.electronics
From: keithl@klic.rain.com (Keith Lofstrom)
Subject: Million mile hard drives
Organization: KLIC
Date: Sat, 22 Aug 1992 16:44:51 GMT

Fun hard drive calculation:

	5 inch diameter platter
      x 3.14
      / 12 inches /foot
      x 3600 RPM
      x 60 min/hr
      x 8766 hr / year
   __________

    469,180 miles / year
      
A hard drive that lasts a little over 2 years continuous use puts in a 
million miles of travel.  Perhaps it would last even longer if you changed
the oil every 3000 miles ;-)

Keith
-- 
Keith Lofstrom         keithl@klic.rain.com       Voice (503)-520-1993
KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
Design Contracting in Bipolar and CMOS - Analog, Digital, and Power ICs
From: dahls@fhydra.dnet.unit.no (Joern Yngve Dahl-Stamnes)
Newsgroups: sci.electronics
Subject: Re: "Super-CD" ... soon ?
Date: 14 Aug 92 15:47:34 GMT
Reply-To: dahls@fhydra.dnet.unit.no (Joern Yngve Dahl-Stamnes)
Organization: University of Trondheim, NORWAY

Thus spoke the keyboard of krueger@cal.enst.fr (Martin Krueger):
>In article <712556100snx@black.demon.co.uk> tchannon@black.demon.co.uk (Tim
>Channon) writes:
>
>>
>>Do you have any idea of what >90dB dynamic range really means?
>>
>
>I've once seen a chart explaining the usable dynamic range of a compact disc in
>professional use (with 16 bit depht). What I remember is :
>
>1)  On the upper end of the theoretical 90dB range they have to cut off 10dB as
>a clipping reserve, since digital clipping would immediatly destroy a whole
>recording.
>
>2)  You cannot really use the lower 30-40dB of the 90dB range, since distorsion
>becomes too high (up to 40% in the first 10db range, as far as I remember). The
>reason for this is the decreasing resolution of the sampling device at lower
>input levels.
>
>Thus the reamining usable dynamic range of a compact disc doesn't exceed
>40-50dB, that is still a lot but can be outperformed by analog recordings.

I think it depend of what kind of music that is recorded. Hard rock music
may need the upper 10 dB for clipping reserve, while classic music don't
need that much. My opinion is that there is more than 40-50 dB dynamic
range on a classic CD.

I got one classic CD with church organ music and I can hear the birds
singing outside the church while in the organ is silent. And on another CD
I can here papers sheets beeing moved. I have never heard it on LP's.

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+-+
* 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  *
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+-+
Newsgroups: sci.electronics
From: aaronb@suhana.analog.ingr.com (Aaron B.)
Subject: Re: Cable Television Descrambling
Reply-To: aaronb@suhana.analog.ingr.com
Organization: Home Office Enterprise
Distribution: sci
Date: Fri, 14 Aug 1992 19:38:54 GMT

In article <1992Aug14.085314.14471@vax5.cit.cornell.edu>, cpyy@vax5.cit.cornell.edu writes:
|> Does anyone want to restart an old thread?  How about Cable Television
|> descrambling in underdeveloped towns (Ithaca, NY for one) ?
|> 

What about universal Descrambler.  That's a good one :-).

Aaron B

aaronb@suhana.analog.ingr.com
From: feiges@jomby.cs.wisc.edu (Howard Feiges)
Newsgroups: sci.electronics
Subject: Phone in use light - help!?
Date: 16 Aug 92 21:55:45 GMT
Organization: University of Wisconsin, Madison -- Computer Sciences Dept.

Hello there feiges here

Ive moved into my new apartment and I now have 5 phones throughout
My roomates pick up on my conversations and modem.  I need a simple little 'in
use' light or LED device. help?!

Ive noticed that when I place a 1.5 volt LED (it gets a little warm)
in series with the phone line, when a phone is picked up the circuit
is completed and the LED lights.  

Is this bad?  How will the LED affect the phones throughout the house,
or the modem even?  Should I put 5 of them in series or parallel?  Should
I scrap this plan and build some other device?
What to do?

please mail me responces to the following addresses (mail to both if you can
becauese one address may be deleted this week, I am not sure)


feiges@jomby.cs.wisc.edu
and
feiges@cae.wisc.edu

thanks tons
tpk
Newsgroups: sci.electronics
From: grimaldo@tokyo.seri.philips.nl (Emilio Grimaldo)
Subject: Looking for LP RF module
Organization: Philips Semiconductors at   Eindhoven, The Netherlands 
X-Newsreader: Tin 1.1 PL4
Date: Thu, 13 Aug 1992 13:10:07 GMT

Hi,
   I am looking for almost any low-power RF module that operates at no more
   than 6 Volts. Like those used in cordless telephone sets. The operating
   frequency is unimportant (could be 49MHz, 900MHz...) and it would 
   preferably have multi-channel capabilities. And yes I need only one set
   (for base and remote unit) for a personal experiment.

   Any information about a company selling small quantities is welcome.
	   Thanks,
		  Emilio

--
D. Emilio Grimaldo T.                |"Earth's largest project is       
grimaldo@tokyo.sce.philips.nl        | also going wrong: humanity..."
PO Box 218,BE-540,5600 MD Eindhoven  |---------------------------------
ph.                                  |The opinions presented, are of myself and
			             |not of my company.
-------------------------------------------------------------------------------
"To love is to smell the fragance of a person's inner beauty..." (I wrote that)
Newsgroups: sci.electronics
From: danr@ais.org (Daniel Romanchik)
Subject: Re: WaveTek 155
Organization: UMCC
Date: Tue, 18 Aug 1992 01:05:24 GMT

In article <keXx2vq00iUyE2ilYu@andrew.cmu.edu> Wayne Alan Martin <wm1h+@andrew.cmu.edu> writes:
>I just bought a WaveTek 155 Programmable VCG from a factory closing sale.
>I would like to have a manual for it, I was wondering if anyone out
>there could help me with places to look, address for WaveTek, or even
>sell me a copy.  Thanks for any help you can give me.
>
  You can call Wavetek at (800) 874-4835.

Regards, Dan
=====================================================================
        Dan Romanchik              |       writer@irie.ais.org
       Technical Editor            |         (313) 930-6564
   Test and Measurement World      |     MCI Mail: tmwromanchik
=====================================================================
   "You can't test in quality" --  ancient Test Engineering maxim
=====================================================================
From: clrmic08@uctvax.uct.ac.za
Newsgroups: sci.electronics
Subject: Mirror Galvonometer HELP !!!!!
Date: 13 Aug 92 23:49:34 +0200
Organization: University of Cape Town

HELP !!!!

I'm busy doing my final year elec eng thesis and I need to get hold of a mirror
galvonometer or similar device to deflect a laser. It must have a range of at
least 5 degrees and a bandwidth of about 10 KHz. I can't get hold of this
device here in South Africa and to import it from the UK will cost about 900
pounds and that excludes import duty etc etc.

I am also looking for a laser in the 5 to 20 Watt power range (visible).

Could someone please post some addresses of places in the USA where I could get
hold of this equipment and if possible prices and technical specifications
would be a great help.

Thanks
Mike
*********************************************************************************
Michael Clark                      CLRMIC08@UCTVAX.UCT.AC.ZA
University of Cape Town
South Africa
********************************************************************************
From: kevins@hpspdla.spd.HP.COM (Kevin G Smith)
Date: Thu, 13 Aug 1992 18:42:35 GMT
Subject: Re: Teledeltos Electric Field Paper?
Organization: HP Stanford Park - Palo Alto, CA
Newsgroups: sci.electronics

Hello again,

Since I posted the base note, I have received some very helpful
electronic mail pointing out that Pasco Scientific (1-800-772-8700)
sells conductive paper for field mapping at relatively reasonable
prices.  There are still folks out there using this material - for
teaching purposes if nothing else!

Cheers,
Kevin

*******************************************
* Kevin G. Smith                          *
* Hewlett-Packard, Stanford Park Division *
* P.O. Box 10151, Mail Stop 5M            *
* Palo Alto, CA 94303                     *
* Phone: (415) 857-3423                   *
* FAX:   (415) 813-3085                   *
* Email: kevins@hpspd.hp.com              *
*******************************************
From: tbp@fig.ucsb.edu (Selvidge;Jason;M;;;COMS;Undergraduate;930612;911009;8-402525-19906-7;1000)
Newsgroups: sci.electronics
Subject: Re: Phone in use light - help!?
Date: 17 Aug 92 03:57:17 GMT

Hi Everyone!

I have the same problem, but at home, where I'm staying for the summer.  When
I use my modem, it is always annoying when someone picks up the phone and
garbage appears.  Sometimes it hangs my terminal or disconnects me. So I did
a little experimenting.

When I connect my multimeter to the phone line, it ran about 50 volts(DC I 
Think) when I pick up the phone from another extension, it dropped to about ten
volts. When somebody called my house, and the phone rang, I got shocked holding
the test leads with the phone line ends. But I caught the measurement at 150 
volts.  

The idea of just connecting a led in series with the phone line is interesting.
I have'nt tried it yet, but it should be able to handle high voltages
or it won't last long. I opened my modem, phone, and answering machine up to 
see what they had in common, and saw a diode bridge, and a large capacitor, as
well as resistors and other passive components.

So maybe a transistor switch with a breakdown voltage at 30 which powers a led
will work. and connected to the line by a diode bridge. I have'nt the parts to
build the project and am too lazy to buy them, but would anyone know if the 
concept is feasible.After all, I'm just beginning to study electronics.  The 
current drain would be too low to affect the phoneline, and the device could
plug parallel into any extension. It would be nice if someone posted an article
that gave a detailed circuit of a working device(unlike my guess). 

BTW, isn't it against the law to connect "unauthorize" devices to telephone
lines? Not that I wanted to discourage anyone from pursuing this useful
project, but are they able to check if you do have something connected to the
line? I connected a small DC motor and it was humming along quite nicely. How
about using the phone line for your recharging needs :). But then it will 
probably screw something up, like noone can call you. That surge to 150V makes
it a little more complicated though for something that requires a regulated
voltage.

Just my thoughts
Jason Selvidge
a.k.a. T. C. Luong
From: mmaster@parnasus.dell.com (Michael Masterson)
Newsgroups: sci.electronics
Subject: Re: Laser speed gun detectors?
Date: 14 Aug 92 15:13:58 GMT
Organization: Dell Computer Co

stirling@mullet.gu.uwa.edu.au (Stirling Hamersley) writes:

>The local police have taken to using speed guns that use
>a laser to determine car speed to catch those with 
>the ye olde radar detectors.  Must have been easier than
>outlawing radar detectors as they have done in NSW.

>Someone told me there are already laser detectors
>around.  Is this true and how do they work?  I imagine
>the would not be very effective as the laser beam used
>to detect the speed is very directional and should only need
>to be on for a fraction of a second, once the car has 
>been sighted.  Radar detectors depend on detecting when a
>car ahead of your car is being gunned.  I can't see you detecting
>the laser until it is too late.

>"Speed limits are for Volvo drivers" - Hamersley.

Ever seen a laser beam?  they beam hits particles in the air and
scatters, heck, get a few watts behind it and you can stand hundreds
of feet away, perpendicular to the beam, an it looks solid in the air.
Anyway... the detectors are supposed to work by detecting the scatter
of the beam when the speed trap zapps someone else, so you get
warning.  

So far, Cincinatti Microwave has a model out, and Bel has one about to
hit stores, CM claims 2500feet detection range, Bel claims 5000 feet,
the range on the speedguns is only about a thousand feet.

The detectors are based on the technology that was used to detect
laser guided weapons in Desert Storm.

cheers.
-- 
Simulated by professionals, do not try at home, see your dealer for details.
Your mileage may vary. Call before digging. Best if eaten by date on package.
Apply only to affected area. Batteries not included. Member FDIC. 
Michael Masterson                                   mmaster@parnasus.dell.com
From: duncan@ravel.ati.com (Jim Duncan)
Newsgroups: sci.electronics
Subject: Re: Voice/Modem Switch
Date: 23 Aug 92 04:21:29 GMT
Reply-To: duncan@ravel.ati.com (Jim Duncan)
Organization: KUFX 94.5 FM Stereo, San Jose, CA 'The Fox'

In article <JON_SREE.92Aug19115220@world.std.com> jon_sree@world.std.com (Jon Sreekanth) writes:
>
>IMHO, you're best off buying a commercial fax switch. 

I use the ASAP TF555 switch (roughly $120) to feed voice telephones,
an answering machine, and two Unix nodes all off the single relatively
expensive foreign exchange phone line I have between Scotts Valley and
San Jose.  My UUCP partners just have to add a few digits and commas
after the phone number in their dialing scripts.  It works great and
saves me a fortune.  

The only caveat.  When the DTMF gets faster than 60 ms., the ASAP
starts dropping digits. To counter this with my speedy UUCP partners,I
just make sure they add more digits = 555-1234,,888,888,888. At 70 ms.,
the switching would be reliable with simply 555-1234,,88,88, for
example. 
-- 
KUFX |      w  ["]                            | WA6MBV     
94.5 |...   |___|_____..duncan@ravel.ati.com  | Jim Duncan  
FM   |          H                             | ----------   
********  \_____I_____/  37 3 10N/121 59 10W  ************** 
Newsgroups: sci.electronics,alt.folklore.urban