HDTenEightyP/NetNews huggingface dataset:
From: acampane@magnus.acs.ohio-state.edu (Angelo Campanella)
Subject: Re: Not really a subject for the group, but...
Keywords: help,repair,copier
Organization: The Ohio State University
Date: Sun, 13 Dec 1992 08:49:49 GMT


I've had a Toshiba BD-4511 copier for several years (various copiers for 20
years), and here are some of their idiosyncrasies:

1/ Humidity drives them crazy.  On hot humid days, (we rarely use air
   conditioning in our house) copies look just like you described!

2/ The faintness can also come from the charge wires not doing their job.
   There are two such charge wires somewhere in the machine around the drum.
   They are about the size of human hair.  Be CAREFUL not to wreck them!
   To do their job right, they have to be WELL insulated,as they carry
   a charge of about 10 KV>

3/ Carefully scrutinize the interior (lid up) for a VERY fine transverse
   wires in a trough holder.  Carefull scrutinize the left-right plastic
   terminal ends of that wires' holders for a cruddy buildup of black soot,
   the so-called 'toner' material.

4/ With tissue swabs, etc., mop up all soot.  All plastic surfaces around
   those terminal ends should be spotless.  (If you are uncertain, and if you
   can slide the whole wire-trough-holder out, clean more, and measure the
   resistance of the wire-to-ground.  It has to be hundreds of megohms or
   more for things to work right).

5/ Blotchy prints are also caused by a dirty seleniuym drum, but cleaning that
   item should be your LAST resort.  Believe it or not, you can clean it with
   metal cleaner (I used fine toothpaste), but the chances of getting a good
   copy is pretty slim after one such amateurish cleaning.  The technician that
   serviced mine was able to do so before my very eyes, but he knew how to get
   that selenium drum out in the open for careful and proper stroking and
   wiping. That's pretty imporatant.)

6/ Generally clean up any soot laying around the innards. Be careful NOT to
   touch the selenium drum (shiny golden brown colored cylinder) or wires.

7/ The soot run-off catcher box fills with soot ("toner") every few months.  
   That's still good toner; I just dump it back into the toner hopper. (It 
   arises from all the "black" you create when copying black objects and
   copying with the lid up, I think).


Hope this fixes your problem!

Ang. C.
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 18 Dec 92 15:29:43 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

In <1992Dec17.170002.28389@u.washington.edu> basiji@stein.u.washington.edu (David Basiji) writes:

>carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick) writes:

>The housing I've proposed is suited to these conditions.  Since we're 
>encouraging collisions between particles by containing them, much of their
>kinetic energy will be dissipated in collision-induced fractures of the 
>flywheel material. Heat is generated in the housing only in irrecoverable

As an energy disapation mechanism, fracturing is meaningless.  Assuming that
the fracturing continues down to the point where nothing larger than a few
molecules are left.  We now have a hot gas with individual particles still
moving very fast.  There is still only one way to dump the excess energy.
Heat that the containment vessel will have to absorb.  BTW, a hot gas
generally indicates high pressure, so if the containment vessel heats up
enough to soften, we could still get a blowout of very hot gas.
I would think you would want the flywheel to be made of something brittle
and the containment to not be brittle.  You want the fly wheel to shatter into
small pieces as quickly as possible, since small particles have less of a
chance to penetrate the containment.   The containment you would want to
bend but not break.

-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
Xref: sparky sci.electronics:21114 sci.energy:6251 rec.autos.tech:16885
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 18 Dec 92 17:01:12 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

In <1992Dec18.012654.26238@ra.oc.com> rodder@ccwf.cc.utexas.edu (Jon D. Rodder) writes:

|Well, lets see..  the 20hp permanent magnet motor in our solar powered car
|is about 6 inches in diameter and 6 inches long.  It weighs under 20lbs.
|See the GM Impact for a production style example of a compact high power
|motor.

Yes, but what is your 0-50 mph time.

-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
From: d2bohre@dtek.chalmers.se (Henrik Bohre)
Newsgroups: sci.electronics
Subject: Re: Questiom: Earphone/Phono Interface
Date: 11 Dec 92 19:38:28 GMT
Organization: Chalmers University of Technology, Gothenburg Sweden

etxansk@garbo.ericsson.se writes:


> I would like to know if there are commercial products available
>that let me connect the earphone output (in this case on a portable
>CD player) to the phono input connector on regular "hi-fi"
>equipment.

> Is it easy to build such an interface?

> Thanks in advance,
> Anders Skelander

Actually I don't think it's worth the trouble if you don't have very good
reasons. You'll probably loose much quality of the sound, because the phono
amplifier tries to RIAA-correct the input signal. That is, it will amplify
the bass and attenuate the treble.
  Another problem is input sensitivity on the phono input. It is much lower 
(let's say about 2 mV), and the CD-player may give up to 1000 mV.

Your question was, if there were any commercial products available. I don't 
really know, but I haven't heard of any.

(Mvh) Henrik Bohre

  @>-+-- (email: d2bohre@dtek.chalmers.se)
Newsgroups: sci.electronics
From: schaerer@isi.ethz.ch (Thomas Schaerer)
Subject: Re: Toggle FF (Switch)
Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
X-Newsreader: TIN [version 1.1 PL8]
Date: Tue, 15 Dec 1992 07:47:42 GMT

Hubey (hubey@pilot.njin.net) wrote:

: I need a toggle-flip-flop that works at 9V so that I can
: use it in conjunction with a momentary-contact switch to
: turn my alarm system on and off.

Where is the problem? You must create a bounce-free-impulskey
and control with it a follow D-flip-flop designed as toggle-ff by
feedback of /Q-output to D-Input. Because the circuit has to work
with 9 vdc, you must take cmos-components of the family CD4xxxx
(NATIONAL SEMIC.) or MC14xxxx (MOTOROLA). For D-ff take the dual
type-d -flip-flop MC1413B or CD14013B. To build a bouncefree impulse-
circuit there are many ways with rs-flip-flop and a on-on-key or
a monoflop with a on-off-key.

More questions, send these to my e-mailbox.

Bye Thomas
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: Ranking the Electronic magazines.
Organization: SSC, Inc.,  Seattle, WA
Date: Tue, 15 Dec 1992 00:03:15 GMT
X-Newsreader: TIN [version 1.1 PL6]

In article <sehari.724185381@class1.iastate.edu> you wrote:
: ---
: 
: I have red many electronics magazines.  I found each has some advantages
: and some short comings.  Here I would like to post it here.  I hope others
: also share their thoughts about their electronics magazines:

: Radio-Electronics    Some practical       Few new ideas,

And now renamed to Electronics Now.

Here are some more that I haven't seen mentioned yet.

>Nuts and Volts       
Content: The want ads for the electronics underground.  Recently added some
article and columns, which range from trivial to incomprehensible, with some 
good stuff inbetween.
Disadvantage: A lot of ads ;-)

>Computer Applications Journal (also know as Circuit Cellar Ink)
Content: Practical applications of microcomputers, (with a higher quality of
engineering than the average in Radio-Electronics).  Along with some theory
articles covering things like how to synthesize holograms.  Like an
older copy of Byte, without the reviews (so it's about 1/4 the size ;-) ).

Trade Press magazines.

>Electronics Design
>EDN
>Electronics Products

Content: What's new and how to use it.
Disadvantage: Controlled circulation.  Qualify or forget it (or pay a lot
of money)

>Personal Engineering and Instrumentation News.
Content: Personal Computers as applied to engineering.  
    Interest areas -> Design and Development - CAD = EDA (Electronic
Design Automation), Logic Synthesis (PALASM, CUPL, ABEL), Compilers
                   -> Data Acquistion and Control - Data collection,
process control 
                   -> Test and Analysis - Logic analyzers plugins, 
Oscope boards, graphing and display.
Good columns on DSP, Embedded Techniques, etc.
Disadvantage: Mostly new product releases.


Mark Zenier  markz@ssc.wa.com  

Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: Railroad crossing gates -the ups and downs???
Organization: Motorola Computer Group, Tempe, Az.
Date: Sat, 19 Dec 1992 12:25:48 GMT

In article <BzGzsI.1u4@chinet.chi.il.us> drx@chinet.chi.il.us (Scott Whittle) writes:
>Ok I'll bite.  How does the railroad control the crossing gates?  Here in
>Illinois, Chicago and NorthWestern changed over the technology at the
>crossings about 2 years ago and have had major problems ever since.  Gates


The old style worked by detecting a short circuit between the rails 
(a locomotive is pretty conductive). If you walk the track near a
crossing and pay attention to where the rail ends meet, you will see
that some are electrically connected and some are isolated. You will
also find cables connected to the rails running under-ground toward
a nearby electrical box which controls the whole thing.

I have been told (but have not seen) that there are two systems used
now-a-days. One is a load sensing system where load cells are placed
on the rail and detect the weight of the train. The other is inductive
similar to the loops which control automotive intersections.

John 
(My brother in law drives big trains for a living)



-- 
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
| N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 |
+--------------------------------------------------------------------------+
Newsgroups: sci.electronics
From: sehari@iastate.edu (Babak Sehari)
Subject: Ranking the Electronic magazines.
Originator: sehari@class1.iastate.edu
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Date: Sat, 12 Dec 1992 18:36:21 GMT

---

I have red many electronics magazines.  I found each has some advantages
and some short comings.  Here I would like to post it here.  I hope others
also share their thoughts about their electronics magazines:
                       Advantage          Disadvantage
                     ------------       ---------------
Radio-Electronics    Some practical       Few new ideas,
                     circuits, some       Not in depth discussion
                     introduction to      about any thing
                     new electronics       Repeating of trivial
                     concepts (only       circuits, few writers with
                     on the surface       few ideas.
                     level)               Neither strong on theory, nor
                                          strong on state of art technology

Popular Electronics  Some new product     The same as Radio-Electronics
                     introduction, Some
                     practical circuits


IEEE Journals         Excellent articles   Expensive for most individuals
                      Many independent     to subscribe( some of them run
                      writers with many    as much as $400 per year)
                      original ideas.      Very little "How to do it" or
                      In depth Theoretical  technical discussions.
                      discussions          Not available in news stands.

                       With highest regards,
                            Babak   Sehari.
-- 
Newsgroups: sci.electronics
From: news@massey.ac.nz (USENET News System)
Subject: Re: Need help with PADS shareware
Organization: School of Maths. and Info. Sci., Massey University, Palmerston North, NZ
Date: Wed, 16 Dec 92 03:58:17 GMT

In article <1992Dec15.164130.23896@netnews.louisville.edu> harpe@netnews.louisville.edu (Mike Harpe) writes:
>I have a different question.  Can I get PADS to display circuit traces 
>in relative sizes?  In other words, I want 50 mil traces to be drawn wider
>than 12 mil traces when I display the board.  It plots fine, i'd like to
>see it that way on the screen.
>

Mike In PADS-PCB, select the SETUP menu (F2) and then PARAMS (F4).
The item called REAL WIDTH is the key to what you want (the default is
250 mil). Any trace less than this (or maybe <= ) are displayed as
single lines, greater are displayed to scale.

I usually set REAL-WIDTH to 11 so that 10mil outlines are displayed as
just lines but 12 mil tracks are drawn to scale.


There was another posting about creating boards and parts placement
(maybe from you?).

One option available when placing components manually is to place
_classes_ of components, rather than just all or individually with the
mouse.

Under the PLACE menu, select MOVE and then type c* to place all the
capacitors or r* to place all the resistors ...  I can't remember
where I saw this but it certainly wasn't obvious (at least to me :-)
(I'm assuming here that you've read in a netlist).
Hope this is useful

Cheers
Giovanni

-----------------------------------------------------------------------------
Giovanni Moretti                                                       ZL2BOI
Computer Science Department, Massey University, Palmerston North, New Zealand
G.Moretti@massey.ac.nz      Phone +64-6-356-9099            Fax 64-6-350-5611
-- 
-----------------------------------------------------------------------------
Giovanni Moretti                                                       ZL2BOI
Computer Science Department, Massey University, Palmerston North, New Zealand
G.Moretti@massey.ac.nz      Phone +64-6-356-9099            Fax 64-6-350-5611
Newsgroups: sci.electronics
From: toddi@mav.com (Todd Inch)
Subject: Re: Caller ID block?
Organization: Maverick International Inc.
Date: Thu, 17 Dec 92 21:39:09 GMT

We got so tired of discussing the social issues of this (the technical
issues are pretty straightforward) over on comp.dcom.telecom that a
special "telecom-privacy" mailing list was started for those who just
couldn't get enough.  But, I'll share a few tidbits of related:

1) If you only want certain people to call a modem/ring your phone, etc,
there is a box, sold by HAL (Home Automation Labs) amoungst others, which
connects to your phone line and the phone/device is plugged into it.  It
answers your phone and demands a touch-tone password.  If the correct 
password is entered, it then generates a new ringing current for your
telephone/device to answer.  For less than $100, it's cheaper and more
straightforward than CID monthly charges + interpreter box.

2) For me, the biggest social issue of taking CID too seriously is:  If
a loved one is in a desparate situation and calls from a strange phone
(i.e. the only one available) are you going to ignore his/her call?  No
replies necessary - some have already said this is not applicable to them,
etc.

3) Related:  Phone numbers get recycled.  If you block too many, one day
it may belong to someone you want to hear from.

4) There are boxes which output RS-232 CID for interpretation by your
computer, etc.

5) Unfortunately this will be a surprise to most of you, but:  800 numbers
come with the implicit ability to obtain the number of the caller, either
real-time or with the monthly bill.  This DOES NOT rely on any technology
for CID - it is completely different and WILL work from any point to any
point, regardless of the availability of CID in those areas or the ability
of the CO switching protocal to pass CID to each other.  This is part of
the implicit billing system, NOT a new user feature.  Some business HAVE
used this to pull up caller credit accounts on their terminals the
instant they answer your customer-service call.

So much for "anonomously" calling those crime watch shows from home via
an 800 number.
Newsgroups: sci.electronics
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Subject: Re: Ranking the Electronic magazines.
Organization: AI Programs, University of Georgia, Athens
Date: Mon, 14 Dec 1992 05:50:28 GMT

I would add two pet peeves:

(1) DOWN WITH kit-like "construction project" articles that say virtually
nothing about how the project works, and expect you to buy a ready-made
kit of parts;

(2) DOWN WITH microcontroller projects that don't publish or even describe
the code!

-- 
:-  Michael A. Covington     internet mcovingt@uga.cc.uga.edu :   Verbum caro
:-  Artificial Intelligence Programs       phone 706 542-0358 :    factum est
:-  The University of Georgia                fax 706 542-0349 :  et habitavit
:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI :   in nobis...
Newsgroups: sci.electronics
From: schaerer@isi.ethz.ch (Thomas Schaerer)
Subject: Re: Voltage regulators in parallel?
Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
X-Newsreader: TIN [version 1.1 PL8]
Date: Thu, 17 Dec 1992 19:20:38 GMT

	Adjustable 4 Amp. - Regulator with 3 LM317
	==========================================

	There is a circuit to parallel three LM317, but all
	outputs must bee coupled with 0.2 Ohm and you need
	additional a purpose opamp, one pnp-transistor, four
	resistance and one potmeter of course to cailbrate
	the output-voltage. You will find this circuit in the
	VOLTAGE-REGULATOR HANDBOOK from NATIOANL SEMICONDUCTOR
	CORPORATION from 1982 on page 10-17.

	Bye	Thomas
Newsgroups: sci.electronics
From: masterov@chiller.ecn.purdue.edu (Michael Masterov)
Subject: Inductance Question
Followup-To: poster
Organization: Purdue University Engineering Computer Network
Date: Tue, 15 Dec 1992 17:10:44 GMT


For anyone out there - I need help.  I am currently running a volta arc
from a welding power supply which is supposedly current regulated.  To
measure the current I am using a scope and a shunt (the supply is not
filtered so there is a waveform to observe ) with a shunt resistance
of 5 milliohms.  Specified current is 20 Amps.  The waveform I am
getting is non-sinusoidal and has an rms value around 300 milliVolts.

Note - I am not an EE.  I am lost.  Anyone out there with a clue?
Newsgroups: sci.electronics
From: byron@cc.gatech.edu (Byron A Jeff)
Subject: Re: Best nicads??
Reply-To: byron@cc.gatech.edu (Byron A Jeff)
Organization: Georgia Institute of Technology
Date: Tue, 15 Dec 1992 16:18:24 GMT

In article <13635@optilink.COM> walsh@optilink.COM (Mark Walsh) writes:
>From article <1992Dec12.131021.19612@panix.com>, by schuster@panix.com (Michael Schuster):
>> In article <rich.724149537@pencil> rich@pencil.cs.missouri.edu (Rich Winkel) writes:
>
>#>I seem to recall radio shack (gasp) had among the best nicads, especially
>#>in the D size, which were something like twice the capacity of all other
>#>D sized nicads.  The reason is that other brands' D nicads were actually
>#>C sized nicads camouflaged in D cases.
>#>Well worth reading.
>
>> Are you sure the Radio Shack endorsement didn't just apply to their alkaline
>> cells? The Radio Shack D nicads are =AA= cells in D cases!
>
>From the 1993 Radio Shack catalog:
>
>Size      Amp hours
>----------------------
>D         1.250
>C         1.250
>9V        0.065
>AA        0.650
>AAA       0.180
>N         0.150
>-- 
>Mark Walsh (walsh@optilink) -- UUCP: uunet!optilink!walsh
>AOL: BigCookie -- Amateur Radio: KM6XU@WX3K -- USCF: L10861
>"What, me worry?" - William M. Gaines, 1922-1992

I don't think that's the version referred to. RS has a line of high capacity
NiCads (from memory of the 1993 catalog):

Size:     Amp Hours
-----     ---------
D         4.3
C         2.0
AA        1.6 (I think) 

note the D and C sizes have different capacities.

These are Gold with Blue writing not the normal purple ones.

I'm planning on using a battery pack with the D size batteries for a computer
I'm building.

BAJ
---
Another random extraction from the mental bit stream of...
Byron A. Jeff - PhD student operating in parallel!
Georgia Tech, Atlanta GA 30332   Internet: byron@cc.gatech.edu
From: swarde@unf6.unf.edu (Rico)
Newsgroups: sci.electronics
Subject: Graphic Equalizer
Date: 17 Dec 92 08:18:20 GMT
Distribution: sci.electronics
Organization: University of North Florida, Jacksonville

Is there anybody out there that has a file on how to make a graphic 
equalizer for a car stereo?  If so, please send me mail.  Thanks in advance!


Sean Warden                                     | ___       ___ 
Future Electrical Engineer/Particle Physicist   |  |   | /   |  "It's not a 
University of North Florida			| ( )  |<   ( ) frat, it's an
Internet:  swarde@unf6.cis.unf.edu              | _|_  | \  _|_ honor society!"
------------------------------------------------|------------------------------
Apple IIgs & TransWarp forever                  | "Drive Offensively; the life
>>>----FSU Seminoles--1992 ACC Champs----->	| you save may be your own." 
Newsgroups: sci.electronics
From: neal@ux1.cso.uiuc.edu (Jerry Neal)
Subject: Re: Using 500W halogen instead of 300W in a fixture
Organization: University of Illinois at Urbana
Date: Fri, 18 Dec 1992 16:53:28 GMT

rp@llex.ll.mit.edu ( Richard Pavelle) writes:


>I purchased a ceiling fixture that uses a 300W halogen. 
>I would like to use a 500W halogen instead. The fixture
>is glass and brass and is about a foot from the ceiling
>with lots of air flow. Is there any reason for not testing
>the 500W and monitoring the resulting heat or am I foolish
>to not follow the manufacturers guidlines?

>In general what advice do you give about installing higher
>power illumination than the manufacturer suggests?

The main (only) problem with this is excessive heat.  I had a kitchen fixture
expode once when I had replaced 60 watt bults with 100's.  Since yours is
constructed with glass, I'd be a little wary.  I have a 500 watt halogen
floor torchaire now and it raises the temperature of the entire room signif-
icantly when it is operating.  12 inches from drywall and wood may not be
enough for absolute safety here.

> 
-- 
  '|{~|)|)\/  T\|{~ /||
 {_}{_}\}\/  ,} |{_("||_>
Newsgroups: sci.electronics
From: acampane@magnus.acs.ohio-state.edu (Angelo Campanella)
Subject: Re: Phone taps/other extensions up
Organization: The Ohio State University
Date: Sun, 13 Dec 1992 08:05:19 GMT

The best way to detect another phone being "off-hook" is to measure the DC
voltage across the line.  When no one is using the line, it is about -48vdc.
When one phone is off hook, it is about -10vdc (don't hold me to an exact
figure).  When the second phone goes off hook, that voltage drops to aboy 6vdc,
etc.

I leave it as "an exercise for the student" to build a display circuit for this
phneomenon.  As you can see, you can start with a VOM!
Newsgroups: sci.electronics
From: mark stephens <stephens@kong.gsfc.nasa.gov>
Subject: Canabalism of old electronics
X-Xxmessage-Id: <A757A13F9F01EC3D@mstephens.gsfc.nasa.gov>
X-Xxdate: Fri, 18 Dec 92 15:39:43 GMT
Organization: NASA/GSFC
X-Useragent: Nuntius v1.1.1d12
Date: Fri, 18 Dec 92 20:38:08 GMT

Perhaps this is a stupid question but... for those in the home hobbiest
arena, do yall routinely canabalise old radios, TVs, etc. for spare
parts?  Seems like there should be some good components to be had such as
pots, transformers and so on.  I don't know if its worth extracting
resistors, though.

Now if I can only convince my sig other that that B&W TV is simply
worthless...

     mark
Newsgroups: sci.electronics