HDTenEightyP/NetNews huggingface dataset:
From: martun@burn.Princeton.EDU (Mehmet Artun)
Subject: LA5658 Info needed on an IC from a SONY amplifier/recevier
Originator: news@nimaster
Organization: Princeton University
Distribution: usa
Date: Mon, 28 Dec 1992 19:30:17 GMT

Hey folks,

I have a SONY receiver, a fancy one from 1986, with lots of electronics
but the voltage conversion IC failed.

The chip looks like this:

            _________________________
            | (metal)               |	   
            |           0           |	   
            -------------------------
            |       LA5658          |
            >                       <
            | (plastic)     5H4     |
            -------------------------
             | | | | | | | | | | | |
             | | | | | | | | | | | |
             | | | | | | | | | | | |

has 12 pins and the company logo on the chip looks like the following:

             _______
            /       \
           /    /\   \
          |    //\\   |
          |   ///\\\  |
           \ ///  \\\/
            \       /
             -------

I mean three V's upside down in a circle. I couldn't figure out which one 
it is. The parts supplier couldn't figure it out either. So if anyone
has any idea as to what this IC might have an equivalent to or any other
information, it would be appreciated. 

Thanks,

		--Mehmet Artun

PS: Please reply to   martun@princeton.edu
From: kcb@post.its.mcw.edu (Kent C. Brodie)
Newsgroups: sci.electronics
Subject: need some basic help with DIODES
Date: 30 Dec 92 21:34:19 GMT
Organization: Medical College of Wisconsin  (Milwaukee, WI)
NNTP-Posting-Host: post.its.mcw.edu
X-Newsreader: TIN [version 1.1 PL7]


A simple question.    Which way does the "band" on a diode go?  +/-?

-- 
--------------
Kent C. Brodie - Sr. Systems/Network Manager		brodie@post.its.mcw.edu
Information Technology Systems
Medical College of Wisconsin				(414) 257-8769
From: smithr@teecs.UUCP (Robert Smith)
Date: Wed, 23 Dec 1992 13:13:39 GMT
Subject: Re: Canabalism of old electronics
Organization: Litton Systems, Toronto ONT
Newsgroups: sci.electronics

This (re: cannibal) can be a great source of parts but be careful of
stuff manuctured before the late 60's. C`aapacitors and transformers can
contain PCB's , some old relays have mercury wetted contacts and there
are other toxic items that were used as well.

Bob.
Newsgroups: sci.electronics
From: medha@cbnewsg.cb.att.com (keshav.havnurkar)
Subject: Digital tuning
Organization: AT&T
Date: Thu, 24 Dec 1992 14:05:02 GMT

Hi
 HAPPY HOLIDAYS !

 I have a sony walkman with digital tuning. The tuning step is
10Khz for AM band. I want to take this to India where stations are at 9KHz
steps. So in India I will be able to catch very few stations with
this walkman. Can anybody suggest any method of changing
the step frequency ? ( Some walkmans come with option, but
mine does not ). Can I tap the line somewhere and introduce
another synthesiser etc ?
(Sony model no is WM-F2097 ( I think ). It is recording type )

Thanks
keshav@mhcnet.att.com


Newsgroups: sci.electronics
From: BrianW@SoundS.WA.com (Brian Willoughby)
Subject: Caller-ID chip names (Re: 2211cp chip)
Reply-To: BrianW@SoundS.WA.com
Organization: Sound Consulting, Bellevue, WA, USA
Date: Wed, 30 Dec 1992 07:14:59 GMT


I'm also looking for information on chips/chipsets to implement Calling Number  
ID (for connection to my NeXTdimension computer).  Who are some of the  
manufacturers of these chips and what are the exact chip number designations?

Thanks,

Ken Dykes writes
| would some kind sole Email me the pinout for the
| 2211cp caller-id (fsk modem) chip? (well, just a DEM chip, no MO :-) :-)
| 
| or if you are really kind, scan the datasheet and Email it to me.
| 
| i've heard the chip called xr2211 as well, so i presume there are
| multiple manufacturers/sources of it.
-- 
Brian Willoughby	Software Design Engineer, BSEE NCSU
BrianW@SoundS.WA.com	Sound Consulting: Software Design and Development
NeXTmail welcome	- NO EMAIL SOLICITATION without prior permission
Newsgroups: sci.electronics
From: mgreeny@uxa.ecn.bgu.edu (Greeny)
Subject: Converting Fluorescent Lights
Organization: Greeny's Bar & Grill
Date: Sun, 27 Dec 1992 04:12:11 GMT

Hi all... Happy Holidays to all -- hope there wasn't too much arguing
with the 'ole relatives :-U)...

I'm wondering how to go about converting two "old" fluorescent light
fixtures (the type where you have to hold in the button for a few
seconds to warm up the bulb, then release it to light the sucker) to the
"new" style of light where just "flipping" the switch turns it on...

Can I just rip out the guts from the old lights and wire in an
electronic balast (and replace the tube with a quick start one as
well)... or do I have to go and deal with something else?

In case you're wondering this is for my fish tanks... I've got two of
them, both with old style lights on them, and want to convert them to
the new style so that the automatic timers on them will be able to turn
the lights on for the fishies when I oversleep *grin*... (right now, all
the timers do is turn the lights off and put them to sleep every
night...)...

Thanks!
-- 

Microcomputer Support Specialist, Student Residential Programs
Western Illinois University, Macomb, IL  61455
Internet: mgreeny@uxa.ecn.bgu.edu (preferred) GEnie: GREENY (once a month)
From: acm@Sun.COM (Andrew MacRae)
Newsgroups: sci.electronics
Subject: Re: Railroad crossing gates -the ups and downs???
Date: 21 Dec 1992 17:29:36 GMT
Organization: Sun Microsystems, Mountain View CA
Distribution: world
Reply-To: acm@Sun.COM (Andrew MacRae)
NNTP-Posting-Host: grendal.corp.sun.com

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
 > come down and stay down without a coming locomotive.  Once I watch the gates
 > come down when the train (albeit moving about 3mpg) was about 25 feet from the
 > intersection.  
 > 
 > I've also noticed that commuter trains will cause the about 5 gates to come
 > down ahead, but a freighter will only bring down 3 ahead.  Anybody will
 > any knowledge they would like to share???


A dozen years ago I worked for a Kansas City based firm that sold railroad
trafic control systems.  In a nutshell, the way the systems worked then was
that a train would cause a short as it rolled over certain pieces of track.
This would cause the gates to drop.  (In the field behind our plant there
was a crossing gate going through a "life time" test.  Twenty four hours
a day it would go up and down, up and down, up and down.  They had a twelve
foot fence topped with barbed wire because the local kids used to grab on
and ride the gate.)

The dispatchers would sit and watch a light board that showed where each train
was and the status of each switch.  It took quite a few seconds to send a
signal to throw a switch before it propagated through the antique relays
in the field, performed the action, and returned a signal.  It was real-time
processing where events could take minutes to transpire.

Of course, all this was running on a PDP-11/34.  Ah, the good old days!

					Andrew MacRae
					
ps: Do you know what is different about the Chicago Northwestern line than
    all the other major railroad lines in the US?
    
					
Xref: sparky sci.electronics:21361 sci.energy:6348 rec.autos.tech:17060
From: jimf@centerline.com (Jim Frost)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 22 Dec 1992 14:14:10 GMT
Organization: CenterLine Software, Inc.
NNTP-Posting-Host: 140.239.3.202

I missed some of this thread but in my opinion all of this is moot
unless they can figure out a way to eliminate the gyroscopic effects
of flywheels.  Did they suddenly find a way to do that and I missed
it?

jim frost
jimf@centerline.com
Newsgroups: sci.electronics
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Electronics Design Question
Date: Thu, 31 Dec 1992 04:44:30 GMT
Organization: U of Toronto Zoology

In article <1238@blue.cis.pitt.edu> djmst19+@pitt.edu (David J Madura) writes:
>I have a circuit design that I need integrated down to 1 or 2 chips
>using FPGA,PLD's or what have you...
>My question is what would be the most cost-effective way of realizing
>this?

You omitted a crucial issue, two actually:  what's the production volume,
and what's the budget?  Doing this with high-end PLDs of one flavor or
another will have a high up-front overhead:  big bucks for the programmer
and design software (you can't build your own, they won't tell you how),
plus some effort adapting your design to whatever flavor of chip you use.
-- 
"God willing... we shall return."       | Henry Spencer @ U of Toronto Zoology
       -Gene Cernan, the Moon, Dec 1972 |  henry@zoo.toronto.edu  utzoo!henry
From: mpaul@unlinfo.unl.edu (marxhausen paul)
Newsgroups: sci.electronics
Subject: ACADPCB package on SIMTEL
Date: 30 Dec 1992 14:33:02 GMT
Organization: University of Nebraska--Lincoln	
Distribution: global
NNTP-Posting-Host: unlinfo.unl.edu

The UN-L Engineering Electronics Shop's ACADPCB circuit board design 
tools for AutoCAD are now available by remote ftp from WSMR-SIMTEL20.Army.Mil
As mentioned in another post, these are a home-brew collection of blocks,
scripts, a custom menu, and documentation, plus a couple of schematic 
shape files.  The archive is ACADPCB.ZIP and should be found in 
/pub/msdos/autocad.

The tools were originally developed using AutoCAD version 2.13 and have been
used with version 10, so you should be able to use them with whatever
AutoCAD you have, including the version that runs on the old non-IBM-PC
compatible Texas Instruments PCs.  Questions may be addressed to my return
address.

--
paul marxhausen .... ....... ............. ............ ............ .......... 
 .. . .  . . . university of nebraska - lincoln .  . . .. . .  .. . . . . . . .
 .     .    .  .   .     .   .  .    .   .  .   .    .   .  grace .   .    .  . 
   .         .       .      .        .        .      .        .   happens .
From: Ted_Eugene_Viens@cup.portal.com
Newsgroups: sci.electronics
Subject: Re: Can Cable TV Descramblers really be detec from outside
Date: Tue, 22 Dec 92 01:29:08 PST
Organization: The Portal System (TM)
  <BzLJF2.JJ6@news.cso.uiuc.edu>

>dbak@elm.lle.rochester.edu (Douglas Baker) writes:
>
>>In our local paper there has been talk of detecting Il-legal cable TV
>>descrablers from outside the home.  I can think of two possible ways
>>this can be done but there may be others.
>
>I suspect that it is simpler than this.  Most people who have "illegal" cable
>descramblers are buying a complete unit by mail order that is essentially
>the same one used locally.  The only difference is that the mail order unit
>is configured to descramble everything.
>
>Since most of the fancy commercial descramblers are remotely configurable
>or something like that, the cable company can probably send a "request ID"
>signal to all lines and see which boxes answer with a configuration that does
>not match what the subscriber pays for.
>
>David
>
>--------------------------------------------------------------
>David Salamon                Physics Graduate Student (Slave)
>d-salamon@uiuc.edu           University of Illinois
>--------------------------------------------------------------
>
I am sure there are a few different ways that cable companies do this.
But in recent meetings with major brand converter sales reps, they told
me that most modern addressable converters have an additional register that
triggers when it receives a special code on an illegaly authorized box.
Scrambled channels are then switched to a channel carrying a message to
call the cable company to report service problem so and so.  Smart thieves
are forced to throw away the box.  Incredibably, many absent-minded thieves
actually call their cable companies.
Bye...  Ted..
Xref: sparky sci.electronics:21386 sci.energy:6360 rec.autos.tech:17065
From: lordSnooty@cup.portal.com (Andrew - Palfreyman)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: Tue, 22 Dec 92 09:20:47 PST
Organization: The Portal System (TM)
Distribution: world
  <1992Dec15.004956.465@mtu.edu>  <1992Dec15.194558.2556@adobe.com>,
  <1992Dec16.192456.6261@news.cs.brandeis.edu> 
  <1goebdINNik@gap.caltech.edu>,<1992Dec17.035214.15058@u.washington.edu> 
  <1gov35INNik@gap.caltech.edu> <1992Dec17.170002.28389@u.washington.edu>
  <1h2vvbINNfm0@gap.caltech.edu>

I wrote:
>Re. the exploding flywheel: I was mulling on flash-filling the
>cavity with thick-setting foam, but I imagine that the response
>time is way too long compared with the split of the wheel.
>Comments?

Lydick:
: Even if the response time weren't too long, this "foam" would merely be yet
: another thing for the flywheel fragments to vaporize, and would almost
: certainly only exacerbate the problem.  Why do so many people have so little
: grasp of the amount of energy we're talking about, here?

Arrogant prating becomes you, sweetie. Nice to see a preacher here 'bouts.

The largest difference, in any case, between the "exploding gasoline"
scenarios and the broken flywheel is not the energy but the instantaneous
power - probably between 8 and 10 orders, depending.

The energy dissipation within the volume of the container tends to zero
for a vacuum; most of it occurs at the container walls. If one could
spread out the volume of energy dissipation, the chances of containment
are concomitantly higher. Despite this fact, I don't *really* think foam
is going to do it.
 --------------------------------------------------------------------------
| lord snooty @the giant |  Would You Like Space Potatoes With That?       |
| poisoned electric head |              andrew_-_palfreyman@cup.portal.com |
 --------------------------------------------------------------------------
From: apn@Apple.COM (Alex Novickis)
Newsgroups: sci.electronics
Subject: Re: Intel BBS / 8052BASIC Code...
Date: 22 Dec 92 20:02:01 GMT
Distribution: global
Organization: Apple Computer Inc, Cupertino, CA

In article <1h76gsINNcm0@crcnis1.unl.edu> mpaul@unlinfo.unl.edu (marxhausen paul) writes:

It may not be on there, but here's a place to start:

Signetics has a BBS for microcontroller & PLD related stuff
1-408-991-2406
1-800-451-2406

mostly 51 & relatives


-- 
Alex P. Novickis, Real Time systems demi-guru.  (W)   408-862-4541
ALINK:alex.n                                    (H)   415-691-0657
UUCP:{amdahl,claris,pyramid,sun,decwrl,well,ubvax,ames}!apn@apple.com,apn@nonvon
"I think... I think it's in my basement. Let me go upstairs and check"-Escher.
From: flux@sys6626.bison.mb.ca (John Kamchen)
Newsgroups: sci.electronics
Subject: Clocks
Date: Sun, 27 Dec 92 22:23:13 CST
Organization: System 6626 BBS, Winnipeg Manitoba Canada

I'm having a problem with a circuit I'm trying to build.
What I need is a 14Mhz clock that doesn't jitter the length of a video 
line.  
An LM1881 provides the syncs, and the clock should be stable as possible.
Looks like this
--____----------------------------------------------
_-____-_-_-_-_-_-_-_-_-_-_-_-  and so on  this is the 14Mhz clock
 
I suppose what I'm trying to do is simulate a color-burst sync circuit
(but using a 14Mhz clock).  The goal is to enable me to address
a pixel every 70ns (for video sampling, image manipulation & such).
 
Anyone know what I can do ?  I've tried Xtals & inverters, all I could 
think of.  I did get this working using a 74HC4046 PLL chip, but
the cost was high ($2.50 for the chip), and at the end of the video line, 
the clock wasn't too stable.

So, that's what I need.  Need help!
-John
SSE BBS (204)589-1078 v32bis AmiTronics- MEGS of 'em
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: stand alone UART ??
Organization: SSC, Inc.,  Seattle, WA
Date: Tue, 22 Dec 1992 04:25:19 GMT
X-Newsreader: TIN [version 1.1 PL6]

Bhargava, Vipin k (VBHARGAVA@Meena.CC.URegina.CA) wrote:
: In <1051@vk2bea.UUCP> michael@vk2bea.UUCP writes:
: 
: > Does anyone know of a current part like the old Western Digital
: > TR1863/1865. It is a stand alone UART, i.e. pin programmable
: > with separate physical recieve and transmit sections.
: > The 1863 appears in the 1984 Data book but WD now only make all
: > singing/all dancing ones that require a microprocessor to talk
: > to them (load registers etc).
: > Michael Katzmann  
: 
: Could someone send me the info as well?

Recently Available (at least listed in my 1990 IC master)
were the AY3-1015 from Microchip (Formerly General Instruments Semi.),
the COM8017 from Standard Microsystems and the HD6402 from Harris.

The HD6402 (with some new part number similar to it) are in the latest
Newark catalog.  The COM8017 are listed in an advertising page
in the latest Active catalog, but not in the price lists.

And if you're fishing the surplus market, there's also parts
from AMI (s1602), Fujitsu (MB8868) and Intersil (IM6402).
And a bunch of real old chips that needed +5 and -12 volts.
(AY5-1013, MM5303, TR1602)

Mark Zenier  markz@ssc.wa.com  

Newsgroups: sci.electronics
From: cabanero@shearson.com (Vincent Cabanero)
Subject: MOTOROLA 68705 routines	
Reply-To: cabanero@shearson.com
Organization: Lehman Brothers, Inc.
Date: Wed, 30 Dec 1992 14:58:32 GMT

hi,

does anyone know of public domain routines for the 68705 family?

thanks,

V


Newsgroups: sci.electronics
From: rich@pencil.cs.missouri.edu (Rich Winkel)
Subject: Testing a magnetron (FAQ?)
Organization: University of Missouri
Date: 21 Dec 92 04:31:25 GMT

I have a dead microwave oven.  The magnetron's cathode reads 0 ohms.
I assume it's the culprit?

Rich
Newsgroups: sci.electronics
From: feg@cbnewsb.cb.att.com (forrest.e.gehrke)
Subject: Re: White noise generator???
Organization: AT&T
Distribution: na
Date: Wed, 30 Dec 1992 19:56:48 GMT

In article <LmoLwB1w165w@inqmind.bison.mb.ca> dino@inqmind.bison.mb.ca (Tony stewart) writes:
>jsawyer@crash.cts.com (John Sawyer) writes:
>
>> 
>> 	How do I get/generate White noise easily???  Any help would be
>> greatly appreciated:  Please e-mail jsawyer@crash.cts.com
>> Thanks!
>
>diodes are ideal noise sources, but there is also a chip that produces 
>Pseudo-random audio noise.

A zener diode operated at a current below its regulated voltage
is an excellent noise source and will generate noise well up into
the UHF region (don't know how low in frequency they start--I have
checked them at 1MHz where they are good generators).

It is worthwhile to test a few diodes if you are looking for
highest output.  A three stage transistor amplifier operated with
a 9V transistor battery will produce a high level of output.

Forrest Gehrke feg@dodger.att.com
From: kong@ece.ucdavis.edu (Timothy Kong)
Newsgroups: sci.electronics
Subject: TV tuner help wanted
Date: 23 Dec 92 23:33:32 GMT
Organization: U.C. Davis - Department of Electrical Engineering and Computer Science
Originator: kong@maple.eecs.ucdavis.edu

As a semi-hobby I am trying to fix a GE 25-inch color TV (around 1980) which
cannot display the low VHF channels (ch 2-5 [or 2-6?]).  It seems that
the device in the tuner module which "enables" the low VHF tuner
circuits has failed.  Does anyone know where I can get the tuner schemetic?
The schemetics for the rest of the set came with the TV, except the
tuner schemetic.  Also, is it hopeless messing around with the tuner
for anyone other than a professional?

All suggesstions/comments are welcome.

Timothy Kong
kong@eecs.ucdavis.edu
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Infinity (aleph-null if you want to be picky)
Date: 24 Dec 92 05:52:24 GMT
Organization: Kernel Mode Consulting, San Diego, CA

In article <1992Dec23.160159.15130@emr1.emr.ca>, mikolaje@ccrs.emr.ca (Ken Mikolajek) writes:
> In article <1992Dec16.011918.25341@eng.ufl.edu> iqbal@omaha.eel.ufl.edu (M.Iqbal) writes:
>>In article <1992Dec12.003507.1@research.ptt.nl>, walvdrk_r@research.ptt.nl (Kees van der Wal) writes:
>>|> In article <1g4ul8INN2em@violet.csv.warwick.ac.uk>, esrej@csv.warwick.ac.uk (Mr
>>|> L A J Davis) writes: 
>>|> 
>>|> > I purchased a 486 motherboard fitted with a 486DX2 50MHz cpu. Unfortunately
>>|> > ... stuff deleted
>>
>>Square wave have infinte number of frequencies: a fact explained in 
>>any introductory communication book. If you do not believe me than 
>>try finding Fourier Transform of a pulse train or see a specturm
>>of a pulse train on a spectrum analyzer. 
> 
> Actually I was under the impression that a square wave only had
> odd harminics. That's what we see in communications  and
> signal processing textbooks.

"harmonics".  And yes, a square wave has only the odd ones.  There are still
an infinite number of them (for a perfect square wave).  

Perhaps if you had some curiosity in fields outside your specialty you would 
have come across the fact that there are an infinite number of positive odd 
integers, just as there are an infinite number of positive integers.  

	--- 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: bills@inqmind.bison.mb.ca (Bill Shymanski)
Newsgroups: sci.electronics
Subject: Re: 110/220 V AC why ?
Date: Wed, 30 Dec 92 12:47:18 CST
Organization: The Inquiring Mind BBS  1 204 488-1607

henry@zoo.toronto.edu (Henry Spencer) writes:

> In article <1992Dec29.160117.12068@cbfsb.cb.att.com> medha@cbnewsg.cb.att.com
> >  I am curious to know why some countries have 110V AC supply
> >and some 220V AC as their main line voltage ?
> 
> Historical accident, mostly.  As others have pointed out, there are other
> voltages in use too.  The higher voltages have both advantages and
> disadvantages, and electrical power systems evolved in parallel so there
> wasn't a single pioneer that everyone else followed.
> 
> >... Is there
> >any talk of standardizing this like SI syatem of measurement ?
> 
> Not a prayer.  The costs of switching would be astronomical, all the more
> so because you can't convert one appliance at a time.  The benefits don't
> justify the pain.
> -- 
   
You will recall back in the early '50s, Ontario Hydro conducted a
roundup and exchange program when they collected all the 25 Hz 
motor-driven appliances and modified or replaced them with 60 Hz 
equipment.  This cost a fortune at the time, but was a Good Thing 
overall because it lead to an all-60-Hz network.  I understand that a 
small amount of 25 Hz generation was in use till the last 3 or 4 years, 
for a couple of industrial customers - for those applications, it wasn't 
too cost-effective to convert them to 60 Hz and so they kept on with 25 
Hz power till the late '80s. 
   
  Bill

bills@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607
Xref: sparky sci.electronics:21357 sci.energy:6343 rec.autos.tech:17052