HDTenEightyP/NetNews huggingface dataset:
From: rubin@skiing.cis.ohio-state.edu (Daniel Rubin)
Subject: Re: Flywheel batteries as EV power source
Followup-To: rec.pyrotechnics
Organization: The Ohio State University Dept. of Computer and Info. Science
Date: Wed, 13 Jan 1993 00:07:25 GMT

>Consult the Hazmat database, or the DOT classification schedule. Black
>powder is most definitely classed as an explosive while nitrocellulose
>propellant powder is classed as a flamable solid. You can ship smokeless
>gunpowder UPS, but black powder must be transported by special hazardous
>materials carriers licensed to transport explosives. There is only one

hmmm...  I am redirecting followups to rec.pyrotechnics where this discussion
should take place.

Black powder is used extensivly in firework because of its pressure to 
reaction curve is steep.  The more pressure the faster it "deflagrates" or
burns.  You ( anyone ) can order black powder and have it shipped in 25lb
containers ( that is the minimum order ) from a place called Coonies
Explosives & Black Powder located in Hobbs, NM without a federal license
shipped via UPS with a hazardus materials charge.  The same charge that is
applied for shipment of basic class C fireworks, many of which contain a lot
of black powder because they are not allowed to contain a lot of flash powder
which does come close to detonation ( stuff used in the class B grand finale 
fireworks called salutes).

Heck I can buy black powder locally at a gun store called The Powder Room
made by a company called GOEX in one pound cans.  BP is not explosive and it
will not detonate.  Are we talking about the same stuff here?  Black powder
is made with KNO3, Sulfur and Charcoal powder and there is no danger of
detonation, but it burns fast especially under preasure and that is why it is
good to launch firework shells etc.

>black powder plant in the US. It is completely remotely operated because
>of the extreme explosion hazard offered by black powder. That's the Hogdon
>Powder Works. In the 19th century, black powder mills were notorious for
>exploding from static electricity or other trivial ignition sources. There 
>were only two mining explosives, blasting powder (aka black powder) and
>nitroglycerin in the 19th century. Both were considered extremely dangerous
>to handle. Nobel made his fortune by inventing a safer explosive, dynamite.
>
>Just why do you think the barrels of modern black powder rifles are two to 
>three times as thick walled as those of modern high power smokeless propellant 
>rifles? It isn't because of a difference in metallurgy.

Because the burn rate of black powder increases with pressure at a higher rate
than modern smokless powders, but still comes nowhere close to detonation.  

I do not think we are talking about the same thing here and I do not have
access to a encyclopedia right now, but I will prove my claims and I am sure
that the readers of rec.pyrotechnics will have something to add.

A good, but older, source for all this is:
"The Encyclopedia of Chemistry", G.L. Clark, Ed, Reinhold, NY (1957)

-- 

             Daniel Joseph Rubin     rubin@cis.ohio-state.edu 
     
                       GO BENGALS!      GO BUCKS!
From: khartman@fnalf.fnal.gov
Newsgroups: sci.electronics
Subject: Re: Ancient Scope Info Required! (Tektronix Type 564)
Date: 10 Jan 93 05:11:09 -0600
Organization: Fermi National Accelerator Lab
NNTP-Posting-Host: fnalf.fnal.gov

In article <1993Jan5.232424.2006@tvnews.tv.tek.com>, bill@thd.tv.tek.com 
(William K. McFadden) writes:
> My e-mail reply bounced, but this info should be of general interest.
> 
> Date:    16 Apr 92 03:37:52 GMT
> From:    keithl@loop.uucp (Keith Lofstrom;;;520-1993)
> Subject: Where to find old Tektronix manuals
> 
> Path:    tvnews!zephyr.ens.tek.com!psgrain!percy!nosun!loop!keithl
> Newsgroups: sci.electronics
> Organization: KLIC
> Lines:   28
> 
> For all you folks looking for Tektronix oscilloscope manuals, old CRTs,
> etc., there is a retired Tek engineer who has quite a stock of old Tek
> manuals and such:
> 
> Deane Kidd
> 27270 Ladd Hill Road
> Sherwood, Oregon 97140
> (503) 625-7363
> 
> Deane worked at Tek for 40 years, and was the guy in charge of telling 
> the rest of us we hadn't done it right yet.  He is taking care of the old
> stuff because he thinks that is part of doing it right  (you can decide for
> yourself what current Tek corporate policy is).  He is probably as much to
> thank as anyone for the old - but still usable - Tek equipment that you 
> folks are trying to scrounge parts and manuals for.  If not for him, the
> stuff would have fallen apart a long time ago.
> 
> Deane sells this old stuff as a labor of love, and he isn't getting rich
> doing it.  If you think his prices are too high, or that he doesn't act
> like a "real businessman", you don't have to do business with him.  If
> you are a connoisseur of classic instrumentation, be glad to have an 
> opportunity to deal with one of the men that made it happen.


	I have purchased a service manual for my Tektronics 545A O-scope
from Mr. Kidd.  I was perfectly satisfied.  Good thing he is out there to 
keep the old Tek "battlehorses" up and running.

 
> Keith
> -- 
> Keith Lofstrom       keithl@loop.klic.rain.com     Voice (503)-520-1993
> KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
> Design Contracting in Bipolar and CMOS - Analog, Digital, and Power ICs
> 
> 
> -- 
> Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
> bill@tv.tv.tek.com, ...!tektronix!tv.tv.tek.com!bill      Phone: (503) 627-6920
> How can I prove I am not crazy to people who are?



Ken
From: slmdj@cc.usu.edu
Newsgroups: sci.electronics
Subject: Re: Can LED segments be fixed?
Date: 4 Jan 93 11:57:26 MDT
Distribution: na
Organization: Utah State University

In article <silver.726114724@sfu.ca>, silver@fraser.sfu.ca (Craig Silver) writes:
> I have an old tv converter.  It's a Jerold, the one with the remote 
> that takes a 9 volt.  Some of the red LED segments that make up the 
> channel display don't light up anymore.  I know the converter is 
> probably not worth fixing, but I'm just curious as to whether or 
> not these things can be done at a barable cost.
> -- 
> 
> ----------------------------------------------------------------------
> Craig Silver	           Computer Science at Simon Fraser University
> silver@sfu.ca (Internet)   Burnaby, B.C., Canada

No... there is no way (at least that I am aware of) to replace just one segment
of the display.  However, since most applications use 7-segment LED displays,
it should be very simple (and cheap too!! :-)) to simply buy a new 7-seg. and
replace the dead one.  

-- 
********************************************************************************
      Paul Cowley      * ----looking for one of those spiffy quotations for my
   ==EE Undergrad==    * .sig...  Any Suggestions???
 Utah State University *
  C/A1C  CAP Utah Wing *
   slmdj@cc.usu.edu    *
********************************************************************************
Newsgroups: sci.electronics
From: wlsmith@valve.heart.rri.uwo.ca (Wayne Smith)
Subject: Transient voltage supressors: Where and when to use them?
Organization: (this space for rent)
Date: Mon, 4 Jan 1993 17:59:15 GMT

Where (in a circuit) and why would the following be used:

1) Transient Voltage Suppressors
   Glass passivated Die, 1 psec response time, uni and bi directional,
   600 and 1500 watt peak pulse power dissipation, 
   made by Diodes Incorporated

2) SIDACtor transient surge protector
   The SIDACTor is normally connected between the high side of the circuit
   to be protected and common.  When the monitored voltage exceeds the 
   breakover (clamping) voltage, the SIDACtor switches on through a negative
   resistance region to a low on state voltage in nano seconds.  The SIDACtor
   is fastor than gas discharge, carbon arrestors and MOV's.
   Made by Teccor.

3) Interference Suppressor Capacitors
   Across the line, electromagnetic interference, isolation and line by-pass
   capacitors.

4) ZNR transient/surge absorbers (Panasonic)
   Zinc oxide non-linear resistors can be used in place of back to back
   zener diodes, protects against lightning, switching surges, noise spikes.

5) Other devices (surge supressors, etc) not listed here.

Specifically, I'd like to get rid of a power-line spike (5-10 volts, 
10-20 usec, on the neutral and hot, occurs about 45 degrees after peak and
valley) and is caused by a nearby speed-controlled AC motor in a laminar
flow fume hood.  I'd like to put some kind of device right at the power
receptical of this unit, but I'm not sure which one of the above devices
would be best, or would even work.  I'd like to eliminate this spike on the
neutral line, because I believe this spike is radiating EMI in our lab.

Any ideas?
From: mbk113@rsphy3.anu.edu.au (Marek Kaminski)
Newsgroups: sci.electronics
Subject: SPI bus EEPROMs ??
Date: 9 Jan 1993 02:35:00 GMT
Organization: Australian National University
Distribution: world
Reply-To: mbk113@rsphy3.anu.edu.au (Marek Kaminski)
NNTP-Posting-Host: 150.203.15.53
Keywords: Motorola SPI bus

Help will be greatly appreciated in finding serial EEPROMs which feature
Motorola SPI 
bus interface. I've painted myself into a corner, putting into a new
design a chip found in
Catalyst Semiconductor Data Book (CAT64LC10 series) which happened to
exist on paper only.
I have hard time believing that they were not second-sourcing somebody.
I need TRUE SPI, can
not use ANY serial bus; all programmable ports of HC705C8 are in use
doing something else.
Thanks, 
Marek Kaminski, Australian National University, Canberra,
mbk113@rsphy3.anu.edu.au
Newsgroups: sci.electronics
From: ghuntres@nyx.cs.du.edu (Gary  huntress)
Subject: Re: Phased sonar
Organization: University of Denver, Dept. of Math & Comp. Sci.
Date: Mon, 11 Jan 93 16:55:02 GMT

jmorriso@ee.ubc.ca (John Paul Morrison) writes:

>In article <1993Jan10.104636.5690@doug.cae.wisc.edu> kolstad@cae.wisc.ed
 (Joel Kolstad) writes:
>>
>>Hi,
>>
>>	I've been told, by those who ought to know, that you can take 3 or
>>more sonar transponders, send out a pulse, and then watch what happens 
o
>>all three of them on the return trip to get an entire effective 360 deg

>>sweep of whatever you're looking at.  Supposedly almost as good as havi
g
>>one rotating transponder, but no more need to rotate -- neat.

>'supposedly almost as good' ... grumble...
>>
>>	So... could someone give me a reference to where I could read all
>>the details about how this is done?  Or, if it ought to be glaringly
>>obvious and simple, explain how it's done?

>I would imagine that a phased sonar works on the same basic principles
>as a phased array radar. (just using different kinds of waves)

>The 3 transponders are like 3 antennas. Send pulses into the transponder

>with different phase angles, and the outputs add and substract in nifty
>patterns. The outputs interfere, cancelling out, or add, making the outp
t
>focused in a certain direction.

>WIth nifty control electronics, who needs a spinning transponder/antenna

>>
>>	Thanks.
>>
>>						---Joel Kolstad


>-- 
>________________________________________________________________________
_
> John Paul Morrison                     |  
> University of British Columbia, Canada |  
> Electrical Engineering                 |   .sig file without a cause
> jmorriso@ee.ubc.ca              VE7JPM |  
>________________________________________|_______________________________
_
The spherical array of a BQQ-5 sonar system (submarine) consists
of well over 1000 seperate elements.  Its "quite" a system!
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Re: NEED SOLENOID ACTUATED WATER VALVE.....
Date: 6 Jan 93 23:03:13 PST
Organization: Kernel Mode Consulting, San Diego, CA

In article <C0Eoqw.5Dq@techbook.com>, philb@techbook.com (Phil Biehl) writes:
> Hi. In examining my hydronic (hot water basboard) furnace, I find that
> it is divided up into three zones. What I'd like to do is put in
> electrically operated valves that controlled via a microcontroller and
> three separate thermostats, one for each zone.  I need to find a source
> for these valves that will fit 7/8" copper piping. 12 Volt coils would
> be nice but not absolutely necessary. 

I don't know about the "7/8 copper piping" part, but one good source for 
solenoid-operated valves is your local home improvement store, in the 
plumbing department.  They're sold for timer-operated lawn sprinkler systems.
The coils are either 12 or 24 V AC -- I forget which.  They would probably 
work on DC as well. 

Editorial comment follows:

The idea of using several thermostats in a house is VERY OBVIOUS to anyone who
has ever tried to stay reasonably, but not overly, warm in the bedroom at
night, with a whole-house heating system controlled by ONE thermostat which is
invariably out in the living room (or, worse, *downstairs* in the living room).
 I don't understand why it isn't obvious to the people who build houses, or to
the people who write the local building codes, particularly in these
(supposedly energy-conservation conscious) times. 

At minimum, houses should be built with a "bedroom area" thermostat and a
"living area" 'stat, with a timer to switch between the two.  

	--- 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: bj368@cleveland.Freenet.Edu (Mike E. Romano)
Newsgroups: sci.electronics
Subject: Ramsey Foxhound Direction Finder
Date: 6 Jan 1993 08:16:57 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu



I am interested in possibly buying the Ramsey kit
DF-1 Foxhound Direction Finder Kit  advert in latest catalog.

Anyone who has built this, I would be interested in hearing
about how it's working.


-- 
Capt. Kirk: let's head for that planet, third from the sun, it
            looks promising.... |-)
From: donrm@hpnmdla.sr.hp.com (Don Montgomery)
Newsgroups: sci.electronics
Subject: Re: Re: How can I align a cassette tape head?
Date: 11 Jan 93 20:37:01 GMT
Organization: Hewlett-Packard, Santa Rosa, CA

In sci.electronics, bb099@cleveland.Freenet.Edu (Adam Trent Phillips) writes:

				    [...]
>  But to adjust the tape head there is usually one of the screws that has a 
>  spring and a washer under it. the head it pivoted on the other, fixed screw.
                                    [...]
With this type of adjustment, I've always had good luck recording a monaural
sinusoid on a recorder known to be in alignment, then playing the tape on
the machine in question and adjusting the screw for a null in a pair of stereo
'phones that have the L-R common disconnected.  You could also make a differ-
ential measurement with a dual-channel 'scope if you didn't trust your ears.

Don Montgomery
donrm@sr.hp.com
From: dlatimer@iris4.chem.arizona.edu (Darin Latimer)
Newsgroups: sci.electronics
Subject: Re: PC board etching question
Date: 5 Jan 93 16:27:02 GMT
Organization: Chemistry Dept. Univ. of Arizona

In article <726223713.F00001@leotech.mv.com>, rplourde@leotech.mv.com (Richard Plourde) writes:
|> Remember, you do not have plated-through holes.  All components will
|> have
|> to be soldered on both sides, while vias will need to be connected
|> through
|> with a scrap piece of wire.  It's all a nuisance, but it does work.
|> 
|> Richard Plourde - Nashua NH
|> rplourde@leotech.mv.com

Is it possible to do your own through hole plating?  I have seen the
press in rivet type vias but was warned away from them as they tend to 
form flaky connections.  How is the through hole processing completed at a 
board house? Thanks for any info, Darin.
From: andy@laguna.santafe.edu (Andy Mell)
Subject: Re: Lasers/collimated light in RGB?
Date: Wed, 06 Jan 93 15:49:16 GMT
Organization: Santa Fe Institute

In article <rgarito.726227989@reef> rgarito@reef.cis.ufl.edu (Robert Garito) writes:
>
>Having many years of concert lighting experience, I can tell you that
>it is unlikely that a night-club is using real lasers.  Several lighting
>companies (notably Intellabeam) market devices that use incandescent
>light with optics to SIMULATE laser beams.  They have a much wider

Just a quick note, Intellabeam is a product name, not a company name. The 
Intellabeam does not look like a laser at all, more like a scanner. The only
product I know of on the market at the moment that produces output which
actually looks like a laser is the Emulator.

Both the Intellabeam and Emulator are made by Lightwave research, Austin, TX

Andy
-- 
-------------------------------------------------------------------------------
Andy Mell, Applied Physics Department,  |   andy@santafe.edu
University of Hull, Hull, HU7 6RX       |   amell@nyx.cs.du.edu
England.                                |   torq@gnu.ai.mit.edu
Newsgroups: sci.electronics
From: zklf0b@gs144.hou.amoco.com (Fergason)
Subject: 8052 basic, Intel bbs.
Organization: Amoco Production
Distribution: na
Date: Mon, 4 Jan 1993 17:34:00 GMT



I mentioned this in a post a while back, and have not seen it posted,
so here is the number of the Intel bbs, as listed in the January
Computer Craft.  Supposedly, the 8052 interpreter source code is
here.  I have not called this bbs.

(916)-356-3605

Toodles,
Kelly

Xref: sparky sci.electronics:22143 sci.energy:6690 rec.autos:31124
From: gregg@bss1.umd.edu (Gregg Piermarini)
Newsgroups: sci.electronics
Subject: DATA Sheet Needed for LM1881 (sync separator)
Keywords: lm1881
Date: 9 Jan 93 05:33:50 GMT
Organization: College of Behavioral and Social Sciences, U of Maryland


Help!

Does anybody have any info/data sheets etc on a LM1881 chip.  It is a video 
sync separator...also, although this may be a really general question..what 
is the easiest way to separate the data from the video signal to display on 
a computer monitor?  If any one has info or can point me in the right 
direction I'd be greatly appreciated!

Gregg


gregg@bss1.umd.edu
From: rick@minster.york.ac.uk
Newsgroups: sci.electronics
Subject: 68020 disassembler for Gould K105/115 analyser
Date: 8 Jan 93 10:02:55 GMT
Organization: Department of Computer Science, University of York, England

Does anyone have the above software which we can copy?
We have all the probe hardware but our software is missing.
The Gould disk part nos. are: 0117-0815-10/20
containing program D68020.exe amongst others.
From: vwass@sdcc13.ucsd.edu (Vincent Wass)
Newsgroups: sci.electronics
Subject: Interfacing to a cassette deck
Date: 7 Jan 93 19:34:18 GMT
Organization: University of California, San Diego

I have a Technics cassette deck (model rs-t22) which has a 3 pin 
remote plug in the back.  I want to have my computer be able to 
control all the cassette deck functions (or at least play, pause,
and rewind).  All I've been able to figure out is that one of the
pins seems to be +5 volts with respect to another pin.  I've noticed
that if I have pushed play, and then I connect 2 of these pins
together, it seems to pause.  But I don't know anything else.

I would like to know if this accepts ttl signals, or analog, or
whatever.  A little help would be greatly appreciated.
Newsgroups: sci.electronics
From: tkivivuo@klaava.Helsinki.FI (Toni Kivivuori)
Subject: New HAM - related directory at nic.funet.fi
Organization: University of Helsinki
X-Newsreader: TIN [version 1.1 PL6]
Date: Fri, 8 Jan 1993 23:30:36 GMT


New ham directory at nic.funet.fi :

/pub/ham/schema - directory for schematics.

Any schemas which may be useful others, may and should be uploaded to there.
Specially, ham related schemas, like preamplifiers, power amplifiers etc.
The format of file, should be PCX, TIFF, GIF, EPS, PS or ASCII. OrCad or
EasyPC files are ok too, but I'am not sure how common those are.
 
/Toni 

--
Tkivivuo@nic.funet.fi, OH2LNM
-- 
Toni Kivivuori                              |  Hamradio, feel the real thing 
InterNet : Tkivivuo@kruuna.helsinki.fi      |  Speed kills - Use DOS!        
BitNet   : Tkivivuori@finuha                | " What whistling comes, will
Packet   : OH2LNM @ OH2NJR.FIN.EU           |   whistling go " (c) Doppler
Newsgroups: sci.electronics,rec.video.satellite
From: gary@aragorn.inmos.co.uk (Gary Morton)
Subject: Re: VIDEOCRYPT encryption system by Fergusson
Reply-To: gary@inmos.co.uk (Gary Morton)
Organization: INMOS Limited, Bristol, UK.
Date: Mon, 4 Jan 1993 18:14:40 GMT

In article <C0B6Fx.74D@cantua.canterbury.ac.nz> geoffrey@cosc.canterbury.ac.nz (Geoff Thomas) writes:
>
>Anybody know how the VIDEOCRYPT encryption system works?
>It is manufacted by in the UK by Fergusson Ltd. The
>decoder has a smart card which needs to be inserted into
>it for it to decode the video signals (audio is unscrambled).
>

Videocrypt uses a method of scrambling known as "cut and rotate". All the sync
pulses are left intact. Each line of video has what is known as a cut point.
The line of video is transmitted with the video portion from the cut point to
the normal end of line first, followed by the normal start of line to cut
point next. The cut point varies from line to line and may be in 1 of 256
possible locations (I may be confusing a similar system here). When viewed
all that is seen is an unintelligle mess. The audio is not scrambled and
sits on a carrier of 6.5MHz (and possibly 7.02/7.20MHz for stereo 
sub-carriers).

The receiver digitises each line of video and stores the result in a memory 
chip. A special secure processor tells another chip where the cut point is, 
and the data is extracted from the memory in a different order from which it 
went in. The data is then passed through a DAC to restore the original video 
line.

Access is controlled by a "smart card" inserted in a slot in front of the
receiver. The smart card is believed to be based around a microprocessor
itself. Some decoders can suffer from black streaks across the picture
under some conditions. This encryption is used by BSkyB and other UK program
material providers on the Astra satellite. A number of UK satellite
manufacturers build videocrypt decoders into their receivers. Both Pace
and Ferguson manufacture stand alone decoders - although the Ferguson is
now a little old in the teeth.

--Gary
+---------------------------( Gary Morton )-----------------------------+
|Disclaimer: The opinions above are my own personal views etc.          |
|Inmos Ltd, 1000 Aztec West, Bristol, UK         Email : gary@inmos.com |
+-----------------------( +44 454 616616 X526 )-------------------------+
From: kludge@grissom.larc.nasa.gov (Scott Dorsey)
Newsgroups: sci.electronics
Subject: Re: HDTV Question
Date: 11 Jan 1993 15:23:46 GMT
Organization: NASA Langley Research Center and Reptile Farm
NNTP-Posting-Host: grissom.larc.nasa.gov

In article <1iqoofINNmek@gvgspd.gvg.tek.com> mrk@gvgspd.gvg.tek.com (Michael R. Kesti) writes:
>
>I think that Christopher ahs reached a false conclusion.  Try this analogy:
>
>	If CDs are digital, what are the number of available pitches
>	for playback.
>
>Of course, being digital in no way limits the number of available pitches.

Bzzt, try again.  Being digital does indeed limit the number of available
pitches.  There is quite a variety of them, and certainly more than the ear
can pick out, but it's not continuous, since time is being quantized when
the sampling is taking place.
--scott
Newsgroups: sci.electronics
Subject: TV delay lines distributors?
From: ven0103@vax1.mankato.msus.edu
Date: 5 Jan 93 16:53:39 -0600
Organization: Mankato State University

Hello!

	Does anybody know a place where I can order delay lines for TV sets?

	I need two different times delays:
			1 micro second.
			64 micro seconds. (There's one with the reference DL710
but a different one may work too.)

		Thanks,


					EDDIE.

			ven0103@vax1.mankato.msus.edu
Newsgroups: sci.electronics