HDTenEightyP/NetNews huggingface dataset:
From: bonobo@Ingres.COM (David Victor)
Newsgroups: sci.electronics,alt.guitar
Subject: Re: Building effects units for guitars
Date: 4 Sep 92 16:45:44 GMT
Article-I.D.: pony.1992Sep4.164544.1779
Reply-To: bonobo@Ingres.COM (David Victor)
Distribution: na
Organization: Ask Computer Systems Inc., Ingres Division, Alameda CA 94501

In article <1882d2INNov1@matt.ksu.ksu.edu> stites@matt.ksu.ksu.edu (Ross M Stites) writes:
>Michael.Bremford@comp.vuw.ac.nz (Mike Bremford) writes:
>
>
>>Well, I'll give the advice I was given.
>>Find a book called 'Electronic Projects for Musicians' by Craig Anderton
>
>I would recommend this book too, especially if you have no or little 
>experience with electronics.  Just beware that the book is over 10 years
>out of date.  A lot of those projects can be built better with simpler
>designs now, then they were at that time.  Also, a lot of the parts used
>in the book are no longer produced.  

The hardest thing to find in the book as far as I could tell was that
dang little Clairex optoisolator (CLM6000) that he uses in just about
every project.  However, I was able to locate two sources for this
part:

Electronics Plus in San Rafael, CA: 1-800-321-4524
Quinn Mike Electronics in Oakland, CA: 1-800-559-1539

Other parts he uses (or direct equivalents) are still available.  I sure
wish *somebody* would write a new version of this kind of book...10 years
is a long time in electronics (well, maybe not *analog* electronics! ;-)

-David Victor
Newsgroups: sci.electronics
From: bkr@drdhh.hanse.de (Bjoern Kriews)
Subject: Re: Does 74LS88 Exist
Organization: Digital Island
Date: Tue, 25 Aug 1992 16:25:36 GMT

10666281@eng2.eng.monash.edu.au (KEVIN PRATER) writes:
>LS07
>did they mean to say the 7407. As this is another chip I can't seem to 
>find.  

-- 
bkr@drdhh.hanse.de - Bjoern Kriews - Stormsweg 6 - D-2000 Hamburg 76 - FRG
------------------------------------------------------------------------------
         "Ich trinke auch nicht weniger als andere Leute."  (K.H.)
From: thomasn@tekig5.pen.tek.com (Thomas M Nathe)
Newsgroups: sci.electronics
Subject: Re: That Magic TV screen
Date: 30 Aug 92 06:08:51 GMT
Article-I.D.: tekig7.6789
Organization: Tektronix, Inc., Beaverton,  OR.

I was in our regional electronics surplus store and they had fresnals for $12
(about 15" dia) and a huge one for $30. They weren't pretty to look thru, but
I'm sure you could fry ants at fifty paces with them ;>
From: sergeb@cco.caltech.edu (Serge J. Belongie)
Newsgroups: sci.electronics
Subject: Suggestions wanted for touch-tone decoders
Date: 25 Aug 92 20:21:58 GMT
Organization: California Institute of Technology, Pasadena

Hi, I'm looking into starting a design which will require a touch-tone
decoder for use with standard phone lines.  Has anyone out there used
any of Motorola's tone decoders, or any other brand's?
Any suggestions or caveats would be appreciated if you have embarked
on some sort of design decoding tones.

Please send mail to sergeb@ee.cornell.edu

Thanks
From: dcg5662@hertz.njit.edu (Dave Grabowski (KxiK))
Newsgroups: sci.electronics
Subject: Tek 310A scope
Date: 27 Aug 92 03:49:22 GMT
Organization: New Jersey Institute of Technology, Newark, N.J.
Originator: dcg5662@hertz.njit.edu


  I've got a Tektronix Type 310A oscilloscope. It's rather old and full
of old tubes (tubes?! what are those?). It's WAAAY out of calibration
but I have no idea who to go to or how I would go about doing it myself
without spending lots of $$$$. Any suggestions?

-Dave
-- 
-----------------------------------------------------------------------------
Kappa Xi Kappa - Over & Above!                         dcg5662@hertz.njit.edu
9 Sussex Ave., Newark, NJ (car theft capital USA)   70721.2222@compuserve.com
From: misra@venture.ksu.ksu.edu (Boo!)
Newsgroups: sci.electronics
Subject: Adjustable and Variable speed drives
Date: 26 Aug 1992 13:50:49 -0500
Organization: Kansas State University
Distribution: world
NNTP-Posting-Host: venture.ksu.ksu.edu


	Help me out a bit here, what is the main difference between 
adjustable and variable speed drives. The books i have refered to tend
to use them as though they are the same. Perhaps they are. From what I 
gather, varible speed drives change speed depending on the load and adjustable
speed drives run at 'adjusted' speed regardless of what the load is. 
I am sure I am missing some basic concept here. Thanks for any help you
can give me. 

						misra@matt.ksu.ksu.edu 

Newsgroups: sci.electronics
From: pjh@mccc.edu (Pete Holsberg)
Subject: Re: SCSI networking
Organization: The College On The Other Side Of Route One
Date: Wed, 26 Aug 1992 00:21:21 GMT

Peripherally related (oops! sorry!!) to the question of SCSI networking:
has anyone used the parallel-to-SCSI cables advertised in the back of PC
WEEK et al? It looks like a nifty way to use an external DAT drive as a
portable back-up unit.

Thanks,
Pete

Newsgroups: sci.electronics
From: chuff@agora.rain.com (Chris Hufnagel)
Subject: Voltage Regulator question and FAQ request
Organization: Open Communications Forum
Distribution: usa
Date: Tue, 25 Aug 1992 08:20:18 GMT

Hello, I have a circuit that needs a power supply of about +5V .5A
The problem is that the only battery that will fit the case will
give out 12V 1.5-2A
 
How would I control the voltage/amperes so that it stays constant at
+5V/.5A no matter how strong or weak the cell is?
 
Thanks for any replies.
 
Also is there a FAQ for this group?

chuff@agora.rain.com
Chris Hufnagel
From: gkwan@balboa.eng.uci.edu (Greg Kwan)
Subject: Re: Is there 9V size 9V Nicads?
Newsgroups: sci.electronics
Organization: University of California, Irvine
Date: 4 Sep 92 00:31:16 GMT
Distribution: usa

In article <1992Sep2.215912.4731@csus.edu> tching@target.water.ca.gov
 (Tracy Ching <SysAdmin>) writes:
>In article <1992Sep2.133309.18492@panix.com> schuster@panix.com
 (Michael Schuster) writes:
>>In article <1992Sep1.181338.29259@leland.Stanford.EDU>
  meric@leland.Stanford.EDU (meric ozcan) writes:
>>>The 9V size Nicads that I see are 7.2V or 7.5V. However manufacturers
>>> ...
>>VARTA makes true 9V nicads.      
>
>	Is this true?  I just got some 8.4V NiCads from Varta

8.4V NiCads are considered "true 9V" batteries; you are correct about
each cell=1.2V.

FWIW: I bought some of these 8.4V at the Price Club. Had no idea they
were the "true 9V" version. They are made by Saft. Interesting what
you can get at Price Club sometimes... (how many got their Macintosh
PowerBook 100's there? :-)

greg

gkwan@balboa.eng.uci.edu
Newsgroups: sci.electronics
From: levi@bluemoon.rn.com (Brandon Moore)
Subject: help!
Organization: Blue Moon BBS ((614) 868-998[024])
Date: Mon, 31 Aug 92 17:00:08 EDT

problem #1:  I need to trip a 9VDC relay with a 25mA (at less than one 
              volt) DC signal.  I guess I need to build a simple amp for
              the signal.

problem #2:  I have no idea how to make an amp, let one that will do the 
              job.

problem #3:  I know no-one capable of helping, save someone on this net.

request   :  Please send me e-mail.  Pretty please?


 This is from
     levi@bluemoon.rn.com
who doesn't have his (or her) own obnoxious signature yet
Newsgroups: sci.electronics
From: disbrow@gilligan.dfrf.nasa.gov (Jim Disbrow)
Subject: Re: PADS software
Keywords: PADS schematics
Reply-To: disbrow@skipper.dfrf.nasa.gov
Organization: NASA Ames-Dryden FRF, Edwards, CA
Date: Tue, 1 Sep 1992 18:26:13 GMT

In article <1992Sep1.105618.28667@dcs.glasgow.ac.uk>, dam@dcs.glasgow.ac.uk (David Morning) writes:
|> rbhardin@undergrad.math.waterloo.edu (Ron Harding) writes:
|> 
|> >In article <1992Aug28.205445.16138@news.dfrf.nasa.gov> disbrow@skipper.dfrf.nasa.gov writes:
|>  talks about having problems with unziping PADS software.

|> Phew! ...and I thought I was the only one with this problem. I even tried
|> creating the directories by hand to no avail.
|> From what I remember, PINSTALL was an .EXE file which unpacked all the PADS
|> software and PINSTALL and all it's associated files was 'zipped' up in turn.
|> Should I have typed:
|> PINSTALL -d  ??
|> 
|> or should I have unzipped them using UNZIP -d  then just run PINSTALL?
|> 
|> Dave
|> 
|> -- 

Well, I finally solved the problem thanx to all the net.wisdom.
Here's what I did...
Since I couldn't unzip on the floppies (thery're only 1.44s), I
copied the three zip files to the hard drive.
unzipped one zip file at a time with the -d option and then copied the
respective files and subdirectories back to the floppy.
(of course I had to remove the .zip file from the floppies.)
Then I installed with pinstall from the floppy.
Everything went well except that I had to tweak my autoexec.bat a bit.
Docs say PADS needs 640K to run.  I've got a couple of drivers loaded that
take up some of that space so I'm down to 550 or so. It still works.

-- 
Jim Disbrow

work: 805/258-3417
home: 805/948-1363

internet:  disbrow@skipper.dfrf.nasa.gov

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  Brain. Brain. What is brain?
      -- Kara the Eymorg, "Spock's Brain," stardate 5432.3.

Newsgroups: sci.electronics
From: macucci@ceg.uiuc.edu (Massimo Macucci)
Subject: Re: Can 220V 50 Hz Stuff be run on US 220V 60 HZ power ?
Organization: University of Illinois at Urbana
Distribution: sci
Date: Tue, 1 Sep 1992 13:21:32 GMT

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

>There's one BIG possible problem:  The grounding is done differently.

>As I understand it, European 220V service is like American 120V service,
>in that one side of the line is at ground potential.  Right?

>American 220V service is different.  Neither side of the line is grounded.
>What you have is a 240-volt center-tapped transformer with the center
>tap grounded.  120-volt service uses half of the transformer, with the
>center tap as "neutral."  240-volt service uses both sides of the transformer.

>It's overwhelmingly probable that the power supplies in your equipment
>will expect "neutral" to be grounded, and will fry something if it isn't.

This problem doesn't exist : a piece of equipment which expected one side
to be grounded would be against any safety regulation. Many European plugs
are not polarized (German, Italian, for example, at least in their most common 
versions), therefore total symmetry is required. In particular, tv sets have
had an insulation transformer for more than ten years to prevent the  problem
the old ones had of a 50% chance of a live chassis (even though the chassis
was not accessible to the user).
In addition, also in Europe it is possible to find some weirdly wired building
which has symmetrical 220V lines, and no appliance ever shows any problem.
					   Massimo Macucci
					   macucci@gate.spg.uiuc.edu
					   macucci@pimic.iet.unipi.it

Newsgroups: sci.electronics
From: technews@iitmax.iit.edu (Kevin Kadow)
Subject: Re: NTSC to PAL	Did anyone try?
Summary: It's done commercially, amateur conversion is difficult
Organization: Technology News, IIT, Chicago, IL
Date: Wed, 2 Sep 92 02:38:48 GMT

In article <31AUG199217470293@robin.rp.csiro.au> awhichel@robin.rp.csiro.au (Adrian Whichello) writes:
)In article <28AUG199216305565@judy.uh.edu>, cscc13@judy.uh.edu (NAVEED IQBAL) writes...
)>Did anyone try converting NTSC to PAL system? 
)>I hear some people does the conversion but I don't know how.
)> 
)>Naveed
)>NIqbal@uh.edu
)
)Yeah, we used to point a PAL camera at an NTSC monitor. Pity about the
)10 Hz pulsation (different line frequency, you see) :-)
)
)Adrian Whichello

Yep, the slight difference in frame rate, color encoding, and dimensions make
PAL->NTSC (or NTSC->PAL) difficult.

	The good news is that there ARE multi-standard VCR's which can play
PAL tapes, all can feed a monitor, and some are able to trick your _TV_ into
displaying an adequate image. The trouble comes when you try to record to a
NTSC VHS VCR.

BTW: I have a video card which can take PAL or NTSC, in S-Video or composite,
and output VGA, NTSC S-Video or composite, or (with an extra encoder) PAL.

I'm not sure home much help this video card (Cardinal SnapCard) would be if
I wanted to transfer pal videotapes from a multi-standard vcr.

Comments anyone?
-- 
                      When all else fails.... RTFM


technews@iitmax.iit.edu                           kadokev@harpo.iit.edu
                         My Employer Disagrees.
Newsgroups: sci.electronics
From: aj008@cleveland.Freenet.Edu (Aaron M. Barnes)
Subject: That Magic TV screen
Organization: Case Western Reserve University, Cleveland, Ohio, (USA)
Date: Sun, 23 Aug 92 17:55:43 GMT


Have any of you seen the 30 minute infomercial for the "Magic TV"?
The point of the show is to get you to buy a plastic screen which
you place in front of your 13" TV and the 25" screen magnifies th
e TV to look like like a 25".

It appears to be a sound concept,but I wonder about the brightness...

Anyway,might any of you folks out there know what the screen is mad
e out of?

I would like to try this myself,but dont feel like paying the $49.95.

They must have confidence in the product,since it has a 5 year war
entee.


Thanks.
-- 
Aaron Barnes
aj008@cleveland.freenet.edu
Part 15 will take over broadcasting one frequency at a time!
Howard Phillips for President!
Newsgroups: sci.electronics
From: johne@vcd.hp.com (John Eaton)
Subject: Re: GPS Availability
Organization: Hewlett-Packard VCD
X-Newsreader: Tin 1.1 PL5
Date: Thu, 27 Aug 1992 23:23:36 GMT

David Lesher (wb8foz@skybridge.SCL.CWRU.Edu) wrote:
: Others said
: # Nope.  Selective Availability (the deliberate pseudorandom "fuzz" introduced
: # by the DoD) is very much back in force.  Pity.
: 
: 
: I've never really understood this. What possible difference does
: several hundred meters error make to either:
: 	a) an incoming 3 gigaton warhead
:
-----------------------------
Why are they called Ballistic Missiles rather than guided missiles?

Firing a ballistic missile is like shooting a rifle at a 45 degree angle 
and having the bullet follow a parabolic course to its target. If the bullet
is off by an inch at the terminal point it is no big deal. If it is off by
an inch when it leaves the barrel then it will miss its target.

ICBM's are smarter than bullets but they have to hit a target 1/2 way around 
the world. If you can't control the error during the initial boost phase 
then you have to carry extra fuel to make continious corrections.


John Eaton
!hp-vcd!johne
From: rwc@ius4.ius.cs.cmu.edu (Randy Casciola)
Newsgroups: sci.electronics
Subject: Re: Needham Electronics PROM burner good/bad ?
Keywords: PROM microprocessor
Date: 29 Aug 92 20:00:30 GMT
Distribution: na
Organization: CMU Vision and Autonomous Systems

>Howdy,
>	I'm doing a small microprocessor project and need to 
>	get a simple PROM burner.  
>
>	What I'm interested in is a small unit made by Needham
>	Electronics that I've done a little research on.
>	Their bulletin board demo download looked very good and
>	I was wondering if anyone has good/bad things to say 
>	about it.  It's a PC compatible board with a ZIF socket
>	hung out the back.  Anyone's sharable experiences with 
>	this unit/company would be appreciated.
>				Thanks Much,
>					Dan

We've been using one here for about 2 months now to program 27C256
EPROMS with no problems.  The software is a little cumbersome to set
up to default to a particular manufacturer, device, filename, etc.
(to do this you cannot just save the current setup, you must manually
edit some initialization file), but for $139 I don't think you can beat
it.  We could not use it to program our Altera PLDs though, for which
we use a (much more expensive) Logical Devices programmer.

Randy Casciola
Research Engineer
Carnegie Mellon University
Pittsburgh, Pa
From: 8918927y@levels.unisa.edu.au
Newsgroups: sci.electronics
Subject: wanted: info in signetics SC26C94 QUART.
Date: 28 Aug 92 06:13:16 GMT
Organization: University of South Australia

Gday,
	Can anybody send me, or point me in the direction of, a source
for information about the SIGNETICS SC26C94 quad uart - other than the
information currently in the handbook "communication products"..

	I would appreciate any information at all, since the handbook
doesn't make the programing of this chip very easy..

Thanks
Kym
------------------------------------------------------------------------------
   "`Get back' I screamed, `I'm an Australian!'.I new this was a pretty
   lame excuse and prepared myself for the truth. `Australia is merely an
   Island of Antarctica' came the voice,`and of no further significance.'
               Suddenly I understood the secret of Atlantis."
--`What's Rangoon to you is Grafton to me' by Russell Guy. JJJ-FM circa 1978--
 Kym B Newbery : 8918927y@lux.levels.UniSA.edu.au : 4th Year electronic eng.
Newsgroups: sci.electronics
From: johnh@macadammq.edu.au (John Haddy)
Subject: Project Design Time
Organization: Macquarie University, School of Mathematics, Physics, Computing and Electronics
Date: Fri, 28 Aug 1992 05:05:22 GMT

I would like to ask everyone for their opinions on this issue:

How long, on average, would you consider a project design/construction to take?

I refer to a project capable of being designed by one engineer and constructed
by one or two technical staff.

I know this is an open ended question, with not enough details to answer
precisely; but I'm after a "gut-feel", not a project plan. Projects are
non-trivial (trivial means a circuit that can be knocked up in under a week or
two with no worries) and require an engineer's skill (i.e. they're not the sort
that an experienced technician would be expected to handle), often with 
background research required (e.g. magnetic properties of toroid materials,
ECL circuit design, high voltage electronics [10-20kV at several amps] etc).

Project Design Time in this case refers to:

1	Project specification
2	Design & schematic capture with simulation and breadboarding where 
		necessary
3	Printed circuit artwork design (on a CAD system)
4	Printed circuit fabrication, drilling and loading (assume in-house
		fabrication takes one day)
5	Circuit test and revision/modification
6	Chassis work (hole drilling, PC mounting, etc)
7	Front panel design and fabrication (Scotchcal or similar)
8	Final test and shipment ('out the door')

Also, how long would a repeat build take. That is, use an existing design. This
would be equvalent to steps 4..8 above, without the circuit revision or front
panel design elements.

My reason for asking is that a director here is under the impression that the out
put of one engineer and two technicians here has been lower than it should.

I personally believe that their output is unbelievably good. However, so as not
to bias your opinion, I'll not quote the details now. 

I will summarise responses if there is enough interest.

John Haddy

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

      |  _  |_   _   |_|  _   _|  _|              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: tchannon@black.demon.co.uk (Tim Channon)
Subject: Data 12A6 wanted 
Distribution: world
Organization: null
Date: Mon, 31 Aug 1992 14:49:57 +0000

>In article <MOTOYAMA.92Aug25101834@harlgw92.harl.hitachi> motoyama@harl.hitachi> (Hiroshi Motoyama) writes:
>>Can anyone out there access to the data for the tube 12A6? I need the Eb-Ib 
>>curves for that tube. The 12A6 is a GT, metal, beam pentode for audio power 
>>amplification, developed possibly in early 40's by RCA. 
>
>I tried to e-mail this but it bounced.
>

I had a bounce as well and on looking at the address, no Japan, so please fix 
your mailer.

The 12A6 is a 12V heater version of the 6A6? 

Try asking vintage radio societies or radio hams and I expect they will know 
where to find the data.

A 1945 publication did not know of the 12A6 under RCA numbers, whilst the 6A6 
in various forms was well covered, and the 25A6 is mentioned. Characteristic 
stated as equivalent to 6N7.
No curves though. 

I would be reluctant to put any tightly specified characteristic on tubes, 
they tend to vary greatly particulary vs. age.

If you are still stuck email me directly.

  TC. 
    E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
From: gunthar@milton.u.washington.edu (John Jacobson)
Newsgroups: sci.electronics
Subject: Rigging up a sound card so that it will do voice mail
Date: 27 Aug 92 01:01:01 GMT
Organization: University of Washington

I am thinking about rigging up my computer so that it will :
    - Determine whether an incoming call is voice or modem
    - Channel it either to the modem  < or >
    - Start up the computer to output a recorded message to the
      <out> so that the caller would know to leave a message.
    - open up a voice file for input and then record the message
      to that file.
    - Increment a message counter

Any ideas ?  Just sort of a long term project for me.

Any thoughts on this subject would be greatly appreciated(or past experiences!)

                                       Thank You,
                                            John
From: dcb0@gte.com (Daniel Bazinet)
Newsgroups: sci.electronics
Subject: Needham Electronics PROM burner good/bad ?
Keywords: PROM microprocessor
Date: 28 Aug 92 20:53:06 GMT
Distribution: na
Organization: GTE Laboratories Incorporated, Waltham MA


Howdy,
	I'm doing a small microprocessor project and need to 
	get a simple PROM burner.  

	What I'm interested in is a small unit made by Needham
	Electronics that I've done a little research on.
	Their bulletin board demo download looked very good and
	I was wondering if anyone has good/bad things to say 
	about it.  It's a PC compatible board with a ZIF socket
	hung out the back.  Anyone's sharable experiences with 
	this unit/company would be appreciated.
				Thanks Much,
					Dan
Newsgroups: sci.electronics
From: morrison@dante.cs.uiuc.edu (Vance Morrison)
Subject: Re: Humidity Sensor Needed (Cheap!!!) 
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
Date: Mon, 31 Aug 1992 13:18:11 GMT

Hello,

For your information the September 1989 issue of Radio Electronics
(pp 65), has a article on humidy sensors.  It describes how some of
them work as well as gives a list of places you can purchase them.

Vance
Newsgroups: sci.electronics
From: aaronb@suhana.analog.ingr.com (Aaron B.)
Subject: Can you identify this chip.
Keywords: M51692P
Reply-To: aaronb@suhana.analog.ingr.com
Organization: Home Office Enterprise
Date: Wed, 26 Aug 1992 01:18:02 GMT

Can anybody identify this chip from Mitsubishi:  M51692P.

Thanks in advance.

Aaron B.

aaronb@suhana.analog.ingr.com

Newsgroups: sci.electronics
From: tappan@hibob.enet.dec.com (Kelly Tappan)
Subject: Programmable Transconductance Amplifier Query
Reply-To: tappan@hibob.enet.dec.com (Kelly Tappan)
Organization: Digital Equipment Corporation, Colorado Springs CO
Date: Fri, 4 Sep 1992 18:41:34 GMT


Hi There,

	I am looking for a Power Transconductance Amplifier Chip/Subsystem
    that is highly programmable.  The "ideal" specifications are below.

	If you have knowledge of such a thing or know someone who does
    please reply to me.  Thanks.


    o	Operates on either a +5 volt or a +12 volt supply.
    
    o	Maximum output current of 2 Amps, with a programmable limit.
    
    o	Programmable Gain Bandwidth.
    
    o	Current sense output.
    
    o	Minimal voltage drop across output devices.

Good day, eh?

Kelly Tappan
MS CXO1-1/P29
301 Rockrimmon Blvd South
Digital Equipment Corporation
Colorado Springs, CO 80919

(719) 548-2681