HDTenEightyP/NetNews huggingface dataset:
From: rob@dexter.psych.umn.edu (Robert Stephens)
Newsgroups: sci.electronics
Subject: Everex Modem Pinouts?
Date: 5 Oct 92 22:29:49 GMT
Organization: University of Minnesota


I cleaned out our equipment room and I found
an Everex 2400 baud modem.  I wasn't able to find the
power supply.

Model: EMAC MD-2400

Does anyone have the pinouts for the 5-pin
DIN plug on the back where the power plugs
in?  If so, Email of this info would
be greatly appreciated.

 
---------------------------------------------
Robert C. Stephens   rob@dexter.psych.umn.edu
---------------------------------------------
Human Factors Research Laboratory
University of Minnesota
60 Norris Hall
172 Pillsbury Dr. SE
Minneapolis, MN  55455
---------------------------------------------
Phone: (612) 626-7521     Fax: (612) 626-7496
---------------------------------------------
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Re: Multimeters
Date: 27 Sep 92 10:24:18 PDT
Distribution: na
Organization: Kernel Mode Consulting, San Diego, CA

In article <1992Sep25.163558.4223@cbis.ece.drexel.edu>, jpw@minerva.ece.drexel.edu (Joseph Wetstein) writes:
> 
> Hi all,
> I'm still looking for a meter. If anyone knows how I can contact FLUKE,
> I would really appreciate the info.
> 
> jpw@coe.drexel.edu

Pick up almost any issue of almost any electronics magazine -- hobby or pro --
and you'll find ads from Fluke.  And several other DMM manufacturers.  

	--- 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: tomb@hplsla.hp.com (Tom Bruhns)
Newsgroups: sci.electronics
Subject: Re: HV transformer sources?
Date: 29 Sep 92 16:00:36 GMT
Article-I.D.: hplsla.5170227
Organization: HP Lake Stevens, WA

mcovingt@athena.cs.uga.edu (Michael A. Covington) writes:

>In article <66792@cup.portal.com> CPS@cup.portal.com (CHRIS PATRIC SMOLINSKI) writes:
>>Anyone know of any mail order sources for reasonably priced HV transformers
>>suitable for Tesla coils? From what I've heard, neon sign transformers work
>>pretty well.
>
>There are neon sign shops in every town in the world...

But a neon sign transformer is NOT a Tesla coil...  (though it can be
used as a high voltage source at line frequency for lots of nifty
experiments-- and, BTW, should be treated with RESPECT.  Many available
milliamps at voltages big enough to reach out and touch you at a
distance are nothing to play foolishly with!)
Newsgroups: sci.electronics
From: gkm@cc.uow.edu.au (Glen K Moore)
Subject: Filtering noise from a Van de Graaf
Summary: I have large Van de Graaf generator which destroys equipment on the sam
Keywords: Filters Noise VandeGraaf
Organization: University Of Wollongong
Date: Mon, 5 Oct 92 12:18:47 GMT

I have built a large Van de Graaf. Belt 6" wide and 6' high. Unfortunately
it rresets computers and destroys chips in some equipment on the same mains.
I have tried a few comercial flters with no success.

Does anyone have any ideas on suitable filters in these circumstances?

The Van de Graaf is to be used in a public science centre and thus there are 
going to be many nearby devices.

Glen Moore
Science Centre, Wollongong
Fax: 61-42-213151
gkm@cc.uow.edu.au
From: whb@castle.ed.ac.uk (H Bruce)
Newsgroups: sci.electronics
Subject: Low power (licence exempt) FM transmitter design.
Date: 6 Oct 92 09:15:55 GMT
Distribution: sci
Organization: Dept. Electrical Engineering, Edinburgh University, Scotland, UK.

Can anyone point me to texts describing the design of such a circuit.

Thanks,

Henry Bruce
From: schuster@panix.com (Michael Schuster)
Newsgroups: sci.electronics
Subject: Re: signal generator CD
Date: 6 Oct 92 21:31:57 GMT
Organization: PANIX Public Access Unix & Internet, NYC

In article <1193@alsys1.aecom.yu.edu> reiner@medusa.bioc.aecom.yu.edu (Peter D. Reiner) writes:
>Is there a CD with different-frequency sine waves on the various cuts?
>I'd like a signal generator but don't want to spend the money!

Some standard test discs are:

DENON AUDIO TECHNICAL CD                 Denon 38C39-7147
JAPAN AUDIO SOCIETY TEST CD-1            JAS YDDS-2
COMPACT TEST                             Pierre Verany PV-784013
DIGITAL TEST                             Pierre Verany PV-788031/032

These and many, many others are available from:

	db Systems
	Main Street
	Rindge Center, NH 03461

	603-899-5121




-- 
_______________________________Mike Schuster________________________________
NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
The Portal (R) System: schuster@cup.portal.com   | MCI Mail,GEnie: MSCHUSTER
Newsgroups: sci.electronics
From: cab@col.hp.com (Chris Best)
Subject: Re: Television Antennas and Grounding
Date: Wed, 30 Sep 1992 14:09:17 GMT
Organization: your service

rubin@skiing.cis.ohio-state.edu (Daniel Rubin) writes:
> I recently installed a rooftop television antenna.  I grounded the mask as
> was recommended in the instruction and I got to thinking.  Why is it a good
> idea to ground the antenna?  I would think that this would invite lighting
> to stike the mask!  I mean the mask is definitely the tallest point with the
> lowest resistance.  Wouldn't this be inviting trouble.  I would think a
> lightining strike would fry the grounding wire which is next to the house.
> This seems like a fire hazard not to mention the jolt to the TV tuner etc...
> Wouldn't you want to deter lighting instead of providing a ideal path for it?

----------

Lightning rods are grounded, too, but it isn't to attract lightning.  It's
to dissipate any localized charge thay may build up, forcing it back to
the same potential as the whole area.  This deters lightning, or at least
lowers the chances of a hit to the same as any other point nearby.

(I'm guessing you meant MAST, the pole/tower that holds the antenna up.
Otherwise, this answer may not be what you're after.) 
Xref: sparky sci.electronics:16351 rec.audio:13174
From: andrew@alice.att.com (Andrew Hume)
Newsgroups: sci.electronics,rec.audio
Subject: decals
Date: 30 Sep 92 01:17:03 GMT
Article-I.D.: alice.23757
Organization: AT&T Bell Laboratories, Murray Hill NJ


	i have a black anodised alumimium chassis that i would like
to label. what mechanisms exist for a one-off task like this?
silk-screening is too expensive (unless there is some cheap way to do it).
i tried the rubon decals that come on plastic sheets but the results were really poor.
(they stuck on crooked and wrinkled and ...)

	so, what have other people done?

			andrew hume
			andrew@research.att.com
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Newsgroups: sci.electronics
Subject: Re: Spectrum anaylsers
Date: 5 Oct 92 03:35:07 GMT
Organization: AI Program, University of Georgia, Athens


Here's how an old-fashioned spectrum analyzer works:

Suppose you want to sweep from 1 MHz to 10 MHz.  You'll need an
oscilloscope; an oscillator that sweeps from 1 to 10 MHz in unison
with the horizontal sweep of the oscilloscope CRT beam; and a
mixer.  Mix the incoming signal with the sweeping oscillator.
Low-pass-filter the output.  Whenever you get output that is well
under 1 MHz (like 100 kHz or below), send it to the oscilloscope
vertical input so that it displays a "blip".

Presto -- you get "blips" at all the frequency components of the
input signal, with height proportional to the strength of the
components.
-- 
:- Michael A. Covington     internet mcovingt@uga.cc.uga.edu 
:- Artificial Intelligence Programs       phone 706 542-0359
:- The University of Georgia                fax 706 542-0349
:- Athens, Georgia 30602 U.S.A.          amateur radio N4TMI
From: ardai@zax.eda.teradyne.com (Michael Ardai)
Newsgroups: sci.electronics
Subject: Re: Electronics magazines & Mail order brides
Date: 5 Oct 92 18:09:24 GMT
Article-I.D.: icd.1992Oct5.180924.5613
Organization: Teradyne, Inc. Boston MA

In article <kennehra.718236463@craft.camp.clarkson.edu> kennehra@craft.camp.clarkson.edu (Rich"TheMan"Kennehan) writes:
-Hi.  I was flipping through the back sections of one of my electronics
-magazines when I saw these ads advertising "attractive asian ladies
-who seek friendship, marriage..."  Could someone PLEASE tell me why
-a company like that would advertise in an Electronics magazine?!?!

In Computer Shopper, these ads used to be listed under the 'Misc. Equipment'
category...

/mike
-- 
\|/  Michael L. Ardai  N1IST   Teradyne EDA 
--- -------------------------------------------------------------------------
/|\  ardai@maven.dnet.teradyne.com
Newsgroups: sci.electronics
From: whit@milton.u.washington.edu (John Whitmore)
Subject: Re: Need small tool to cut pcb board
Organization: University of Washington, Seattle
Date: Tue, 6 Oct 1992 00:44:22 GMT

In article <Bvnv3y.89B@acsu.buffalo.edu> v064mb9k@ubvmsb.cc.buffalo.edu (HELLO) writes:
>
>  I am working on a device that I want to manufacture in short numbers.
>The pc board dimensions are roughly 3*3 inches. Its much easier
>to cut my own from stock. Is there a cheap or inexpensive tools that
>could cut 1/16th inch double sided clad board neatly?

	One cuts PC material with a shear; since the board comes
in largeish sheets, the shear has to accept the smaller of the
two dimensions of the sheet (typically 2'), and that kind of shear
costs circa $1000.

	There are good alternatives, and there are inexpensive
alternatives, but I'm not aware of any good inexpensive alternatives.
Find a shop that will do it for you; any sheet metal fabricator
can chunk out the pieces for pennies.

	John Whitmore
From: merritt@macro.bu.edu (Sean Merritt)
Newsgroups: sci.electronics
Subject: manufacturers of GPS equip.
Keywords: GPS, UTC
Date: 6 Oct 92 18:47:58 GMT
Organization: Boston University Physics Department



I am looking for info on Global Positioning System receivers
and Atomic Clocks (Rb ,Cs osc.).

I would prefer U.S. based manufacturers, also any experts in the
field that might have some hints on setting up such a system,
I would like to hear from you. This is not a commercial venture.


Thanks,

-sjm

-- 
Sean J. Merritt		         |      Nietzsche che dice?
Dept of Physics Boston University| 	       Boh!	
merritt@budoe.bu.edu		 |
From: hutch@pluto.sybase.com (Reginald Hutcherson)
Newsgroups: sci.electronics
Subject: Cable Descrambler.
Date: 29 Sep 92 19:52:41 GMT


	  Folks,

	  Anyone have any experience building Cable T.V descramblers,  or
	  could point me in the right direction, that is, basic info. and
	  kits/projects that could be built?

	  Thanks in advance.


-- hutch
From: hartman@socrates.ucsf.edu (James Hartman)
Newsgroups: sci.electronics
Subject: Home Control (Computer-style)
Summary: Would like references for devices that can be used in home control
Keywords: computer,control,automation
Date: 6 Oct 92 21:40:16 GMT
Organization: UCSF Computer Graphics Lab


I would appreciate any references to interface devices that can be
used in control and monitoring of the living space.  (this includes
but is not limited to low-speed data acquicition for sensing and 
control of appliances.)  Also information on applicable books and/or
magazine articles.   Thanks!
Newsgroups: sci.electronics
From: sane@bbiw02.enet.dec.com ()
Subject: Looking for : Cross compiler for MC68HC11
Keywords:  68HC11 compiler
Reply-To: sane@bbiw02.enet.dec.com ()
Organization: Digital Equipment Corporation
Date: Thu, 1 Oct 1992 08:21:19 GMT


Hi netters,

	Subject says it all. Preferabally should be in UNIX or DOS environment.

	Enjoy

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From: hbg6@phx.mcd.mot.com (John Schuch)
Newsgroups: sci.electronics
Subject: Re: Telephone interface
Date: 2 Oct 92 13:00:56 GMT
Article-I.D.: phx.1992Oct2.130056.17508
Organization: Motorola Computer Group, Tempe, Az.

In article <1agi51INNc58@usenet.INS.CWRU.Edu> at847@cleveland.Freenet.Edu (Jeff Hunsinger) writes:
>
>This has got to be an FAQ, but I just read about 100 subject lines
>and didn't find it. I am trying to hook up a DTMF decoder (SSI202)
>and a voice synthesizer (amplified with an LM386) to a telephone line.
>The DTMF decoder works fine so long as I don't hook up the amp.
>Here's my current set-up:
>----Cap--- 600:600 ohm matching transformer-> amp -> ssi-202
>                                           <- Amp -< voice synth.



Possibly I don't understand what your doing but what is the purpose
of the amplifier in line with the SSI202? The 202 should work fine
just capacitivly connected to the 'safe' side of your isolation
transformer. Maybe a more detailed ASCII-schematic (ASCIImatic ? :-)
would make it clearer.

John
From: rxtajp@minyos.xx.rmit.oz.au (Andrew Pettifer)
Newsgroups: sci.electronics
Subject: Are HeNe lasers polarised?
Date: 29 Sep 92 06:16:38 GMT
Organization: RMIT Computer Centre
NNTP-Posting-Host: minyos.xx.rmit.oz.au

I would REALLY LIKE to have an answer to this question, i suspect that they
usually are, but i hope otherwise.
If someone could let me know i would be eternally grateful........
Newsgroups: sci.electronics
From: amigo@milton.u.washington.edu (The Friend)
Subject: FORSALE: 70' 8-conductor shieled wire
Organization: University of Washington
Date: Sat, 3 Oct 1992 01:11:43 GMT


	I recently bought 70 feed of 8-conductor shielded wire for
a serial to serial connection across the house, but now as it turns
out, I won't be needing it, so I'm selling it. Asking $20 or best offer..



						--> Mike
From: lance@helios.ucsc.edu (Lance Bresee)
Newsgroups: sci.electronics
Subject: Re: DC to AC help
Date: 1 Oct 1992 16:21:48 GMT
Organization: UCO/Lick Observatory
NNTP-Posting-Host: helios.ucsc.edu

In article <717929289.2@mailbox.bison.mb> Jason.Goga@mailbox.bison.mb.ca (Jason Goga) writes:
> > If I have a DC current how can I go back to an AC current???  This has
> > confused me greatly.  Can anyone help?
> >                        chris.
>Chris,
>
>I'm new to the echo, and hence may not be up on what yer level of expertese (sp?) is. However the basic idea with DC -> AC conversion is you need to turn the DC on and off, and work with the rough AC produced to form a wave that's acceptable.
>
>For example you could stick a MOSFET in series with your DC load and switch it on and off, you'de get AC that way. (very very crude)
>
>If you're powering an inductive (say a motor) or capacitive load and want a more smooth AC. You can use the reactive components of the load to smooth out a pulsating DC. You would do this with Pulse Width Modulation. First figure out the value of the sine
>

Hey, I just had a thought,
tell me if this will work:
    Take a high power mosfet and operate it as a class C amplifier
    driven by a 60Hz oscilator.  Run the output through a tank tuned
    to 60Hz.  The inductor in the LC circuit is the primary of a
    step-up transformer which takes your resulting sine wave to
    line level.

    Obviously, inductive loads on the output will effect the 
    inductance of the Lc circuit, and cause some change in
    frequency....I don't know how that would be dealt with.....


lance
From: apollo@buengc.bu.edu (Doug A. Chan)
Newsgroups: sci.electronics
Subject: Macrovision filter article wanted...
Date: 7 Oct 92 03:34:40 GMT
Distribution: na
Organization: College of Engineering, Boston University, Boston, MA, USA
Originator: apollo@buengc.bu.edu

I believe some people on the net mentioned a Radio Electronics article
on filtering out Macrovision.  Those *(&$(! lines fading in and out is
quite annoying!

What issue(s) were they in?
Can someone send me a copy of the article(s)??
(US snail/fax/scanned images...any convenient format will do!)

Thanks
-Doug
apollo@buengc.bu.edu
From: cyberman@toz.buffalo.ny.us (Cyberman)
Newsgroups: sci.electronics
Subject: Re: f-f-f-fast roms
Date: 3 Oct 92 19:09:51 GMT
X-Maildoor: WaflineMail 1.00r


   Jeff Humphrey was espousing about 'F-f-f-fast roms',
   on [10-02-92  17:48] to All!
 JH> I'm looking for a source for the FASTEST ROMS you can POSSIBLY
 JH> think of.  I've found 4Kx8 35ns eproms, but I need even more
 JH> speed ... < 20ns preferred.  Even if you don't have the source,
 JH> How fast can a ROM go ?

 JH> More interested in prom/eprom than masked, but I'd like to
 JH> hear about them too ... R they faster ?

    Masked ROMS are the fastest you can get them at <5ns I
    suspect ecl versions can be <1ns.  The reson being is that
    they are much simpler than an EPROM or PROM and merely use
    diodes that are MASKED programed instead of LINKED.

        Stephen Cyberman@Toz.Buffalo.NY.US
        Scripted at Sat  10-03-1992  14:10:56

... Starterprise.  Its mive year fission:  To extlore prange wew
--- Blue Wave/QWK v2.10
From: Michael.A..Covington@mailbox.bison.mb.ca (Michael A. Covington)
Newsgroups: sci.electronics
Subject: Re: cascade multiplier question
Date: 25 Sep 92 02:00:43 CST

Organization: University of Georgia, Athens

In article <1992Sep24.122427.842@mala.bc.ca> princecr@mala.bc.ca writes:
>
>	How does a Cascade voltage multiplier work.  I fail to see how
>a voltage increases going through a mess of diodes and capacitors.  Can 
>anyone provide some theory.  Thanks
>					chris.

Here's a little bit of theory:

Charge two capacitors that are connected in parallel.

Then separate them and put them in series.

Presto -- double the voltage (and half the current).

Voltage multipliers use diodes to do essentially this -- let them charge
in parallel and discharge in series.

-- 
+ Michael Covington - Artificial Intelligence Programs - U of Georgia - USA 
+ Unless otherwise noted, these are private opinions, not official statements.

 * Origin: The Electronic Mailbox (1:348/7.0)
From: endelman@wellworld.Eng.Sun.COM (Aaron Endelman)
Newsgroups: sci.electronics
Subject: Flakey Apple II+ keyboard
Date: 2 Oct 1992 22:56:07 GMT
Organization: Sun Microsystems, Mt. View, Ca.
NNTP-Posting-Host: wellworld

My trusty old Apple II+'s keyboard is getting flakey.

In particular, pressing the '4' key sometimes generates an event, sometimes
not.

Can this be fixed (cleaned?), without replacing the entire keyboard?  How?
If not, do you know of anyone still supplying replacement keyboards?
--
--------------------------------------------------------------------------
Aaron Endelman  KK6QH      SPARCworks IBEx Group      endelman@eng.sun.com
UMTV12-33, Sun Microsystems, Inc., 2550 Garcia Ave., Mtn. View, CA   94043
"What a waste it is to lose one's mind, or not to have a mind at all." -DQ
Newsgroups: sci.electronics
From: hbg6@phx.mcd.mot.com (John Schuch)
Subject: Re: Electronics magazines & Mail order brides
Organization: Motorola Computer Group, Tempe, Az.
Date: Mon, 5 Oct 1992 02:43:09 GMT

In article <kennehra.718236463@craft.camp.clarkson.edu> kennehra@craft.camp.clarkson.edu (Rich"TheMan"Kennehan) writes:
>Hi.  I was flipping through the back sections of one of my electronics
>magazines when I saw these ads advertising "attractive asian ladies
>who seek friendship, marriage..."  Could someone PLEASE tell me why
>a company like that would advertise in an Electronics magazine?!?!

Go to a video store and rent "Revenge of the Nerds."

>Has anyone ever answered these ads?!?! 

My wife wouldn't let me. 

>This is something "consumer >reports" should definitely check out!!!

I'd love to see the price/performance, workmanship, and form/fit/function
sections of their review.

John (big smiley)

Newsgroups: sci.electronics
From: blp@cypress.com (Bruce Prickett/PROM)
Subject: Re: F-F-F-FAST ROMS 
Summary: WE MAKE 'EM !
Reply-To: blp@cypress.com.UUCP (Bruce Prickett/PROM)
Organization: Cypress Semiconductor, San Jose, CA
Date: Sat, 3 Oct 1992 19:03:38 GMT

In 3820@ra.nrl.navy.mil,
we hear from humphrey@hightop.nrl.navy.mil (Jeff Humphrey):

>  I'm looking for a source for the FASTEST ROMS you can POSSIBLY
>  think of.  I've found 4Kx8 35ns eproms, but I need even more
>  speed ... < 20ns preferred.  Even if you don't have the source,
>  How fast can a ROM go ?

>  More interested in prom/eprom than masked, but I'd like to
>  hear about them too ... R they faster ?

When you say 20 ns, do you mean military (125 C) or commercial
(70 C) temperature ranges? 

We have had 20 ns 2kx8 and 8kx8 parts in production for years.
These are readilly available at 25 ns for military spec.
These are EPROMs rather than ROMs or Bipolar PROMs, so they are
available both in opaque and windowed packages. We also have fast
128k, 256K, and 512k parts in the 30 to 50 ns TAA speed range,
and are currently sampling a 25 ns 1-Meg EPROM in 64Kx16 and
128Kx8 pin-outs (Please excuse the self promotion, since this
was my design project ;-)    ).

As for how FAST can a ROM go, all the really fast parts (<30 ns)
are CMOS EPROMs. Bipolar PROMs were stuck at 35ns, mostly in 2kx8
pin-outs. CMOS EPROMS have moved to faster speeds (20-25 ns TAA)
and higher density. Our 1-Meg EPROM uses BICMOS circuits, including
bipolar sensing, but still uses an EPROM core array. As far as I know,
no-one makes a fast masked ROM, since the market doesn't support it -
- high speed PROMs tend to be in lower volume, high performance
applications.

Cypress is currently sampling EPROMs that are faster than 20 ns
in asynchronous applications. We also have a burst-mode part with
a 14 ns cycle time. Another option is to use registered (synchronous)
PROMs, which we also have a wide variety of. Anyhow, get in touch
through e-mail and I'll connect you with someone who can answer all
your questions.

		Bruce Prickett,
		blp@cypress.com
From: twb0@ns1.cc.lehigh.edu (Thomas Brown)
Newsgroups: sci.electronics
Subject: Remote power supply control
Date: 5 Oct 92 20:19:05 GMT
Organization: Lehigh University
X-Newsreader: Tin 1.1 PL5

Can anyone offer advice on the best way to control a DC power
supply (0-15 volt range) using the "REMOTE" leads on the rear
of the unit?  Most supplies with "REMOTE" voltage control want
to see a varied resistance across two terminals (from the voltage
output through a varied resistance to the "REMOTE" input).  I
am looking for a way to replace the resistor with a variable
voltage input from, say, a D->A convertor or other external
voltage source.

Thanks much,
-Tom
-- 
--=--
Thomas Brown, KA2UGQ          Internet: twb0@lehigh.edu
Lehigh University UC Box 855  UUCP: ..!uunet!lehigh.edu!twb0
Bethlehem, PA  18015          AX.25: ka2ugq@ka2ugq.nj.usa.na
Newsgroups: sci.electronics