HDTenEightyP/NetNews huggingface dataset:
From: Brian R. O'Hern (BRO'Hern)
Newsgroups: sci.electronics
Subject: Cable, Stereo, and VCR Questions
Keywords: Cable TV Stereo VCR
Date: 27 Jul 92 13:38:17 GMT
Reply-To: ohernb@lonex.rl.af.mil
Followup-To: same
Distribution: usa
Organization: USAFRL (Rome Laboratory)


 I have three questions:

1.  I have a lot of RG-58C (50 ohms) and was thinking of using it to 
connect my Marantz 200W amp to a pair of Klipsh Heresy speakers.
Are my calculations showing that nearly 86% of the signal would be
reflected back from the 8 ohm load?  So, not only "no" but "hell no"
I shouldn't use coax to drive my speakers? 
  However, my instinctive feelings tell me that at because the line
is not infinite (transmission line theory), the connection is
analyzed as a RC circuit showing the characteristic impedence of the
line is close to the load value so reflection isn't a problem.  Also,
at 30pF a foot, an audio signal would hardly notice.  In fact, it
seems connections using coax would be better than a zipcord (~150
ohms) or even a twisted pair and much less noisy than both?

1a. Side Ques: I heard that the "Heresy" name came about because its
design (Conventional paper cone) is not the standard (does not
follow the Klipsh design doctrine).  Any truth to this?

2. Is there a FAQ list on VCR problems?  It seems that everyday there
is at least one question about VCRs... speaking of which...  I have
a RCA that stops a couple seconds after pushing play no matter where
you are on the tape. 

3. I have a couple of coax splitters that I acquired in college from 
my cable connection.  I would like to use them to split an antenna
signal (one to TV one to FM stereo).  Is there any truth to the 
rumor that the splitters filter out high UHF?  I.E. I won't get
channel 68 (~795MHz) through it.

Thank you for any comments.


BRO'HERN
STD DISCLAIM APPLIES ('disClaim dat I make is no lie...)
This medium is subject to monitoring. Use of this medium constitutes
consent to such monitoring.
Xref: sparky sci.electronics:13595 rec.audio:11015
From: sklower@diva.Berkeley.EDU (Keith Sklower)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Length of CDs (was Re: Life after CDs)
Date: 30 Jul 92 00:59:00 GMT
Organization: UC Berkeley EECS/TCS

In article <7942@sirius.ucs.adelaide.edu.au> francis@cs.adelaide.edu.au
writes:
 ... (A very thorough and enlightening article discussing the encoding
 of data on a compact disk, and its implications for the amount of
 data that can be stored thereon) ...

But Francis neglected to mention another practical matter which effectively
limits the amount of time to slightly less than 80 minutes, which is the
longest 3/4" (umatic) video tape that you can conveniently obtain!

It is >>still<< the case that what you send to a CD pressing plant has
the sound samples encoded in the video portion of a umatic tape,
with SMPTE time code running continuously in one of the audio channels
and a list of start and stop times encoded as a burst at 4800 baud
at the beginning of the other channel.

A blank 60 minute tape for this purpose costs $30-40; an 80 minute
tape costs $55.   It also apparently takes a fair amount of tweaking
and adjusting of the umatic recorder to deal with the longer tapes.
From: cjackso@nv6 (Clay Jackson)
Newsgroups: sci.electronics
Subject: Re: SHOCKING STORIES
Date: 22 Jul 92 19:21:37 GMT
X-Newsreader: Tin 1.1 PL4

feliccia@rodan.acs.syr.edu (Nicholas J Feliccia) writes:
: .
: 
: I am talking about kissing the flyback transformer.
: 
Well, OK - the biggest jolt I ever personally got was in college, at the
college radio station.  I was re-wiring our request (phone) line and had
one lead in each hand when someone called in....

I picked myself up from across the room.

In high school, a friend  (Hey, Alan - if you're reading this, please
reply) tried to use some diagonal cutters on a 120VAC line cord,
unfortunately, it was still plugged in.  He spent several weeks in
"boxing glove" type bandages due to burns on his hands. It was a pretty
neat light show.

At the same high school, we had an old ASR33 teletype, complete with a HUGE
DC power supply.  Someone also had given us a bunch of 1 FARAD 24V capacitors
(they were pretty hefty critters).  We used to charge a couple up overnight
from the '33 and then run around school drawing sparks - one guy would 
hold the cap and the other would hold 2 #4 gauge insulated wires connected
to the cap.  We could draw sparks about 6" long.  One time some macho
kid came up and grabbed the two leads just as someone was putting 
'em together.  ZAP.....



--
Clay Jackson - N7QNM
US WEST NewVector Group Inc
Bellevue, WA
uunet!uswnvg!cjackso
Newsgroups: sci.electronics
From: anbo@wuee1.wustl.edu (Albrecht Jander)
Subject: Re: SHOCKING STORIES
Organization: Washington University, St. Louis Mo.
Date: Wed, 22 Jul 1992 22:06:57 GMT

In article <1992Jul22.195043.28269@unx.ucc.okstate.edu> martin@datacomm.ucc.okstate.edu (Martin McCormick) writes:
>In article <7480@public.BTR.COM> grady@public.BTR.COM ( ) writes:
>>Just to take this thread on a morbid twist,
>>does anyone know what voltage and amperage
>>is used in state executions?
>
>I don't have the references right infront of me, but I remember hearing
>the figure 1800 Volts.  I think that it varies from state to state, because
>I have heard other voltages and currents stated.  All have been well above
>110 or 220 Volts and I believe the power used is around a kilowatt.  I did
>read that the shock is delivered in bursts of a minute or so to keep from
>cooking the body any more than necessary.
>	This brings another question to mind.  Has the Occupational Safety and
>Health Administration written guidelines for electrical safety for
>electric chairs?  You know, somebody could get hurt in one of those things.
>
>Martin McCormick WB5AGZ   Stillwater, OK
>O.S.U. Computer Center Data Communications Group

It's amazing how hard it is to kill someone when you really want to.  I was
reading a short article about an electric chair execution the other day.
Apparently the shock failed to kill the guy the first two times, but just
blew the straps off.  The funny thing is that the article said that the
chair had been tested before the execution.  How the heck do you test an
electric chair?????????

Joe: So, what does your father do for a living?
Sue: He tests electric chairs for the government.   :-)

Albrecht



---------------------------------------------------------------------------
                        Peltier was a cool dude!!
Newsgroups: sci.electronics
From: strong@tc.fluke.COM (Norm Strong)
Subject: Free resistor networks
Keywords: Almost ready
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Distribution: na
Date: Tue, 28 Jul 1992 14:30:11 GMT

To all those who e-mailed me requesting free resistor networks, I am
about ready to mail them.  (I've been on vacation.)  If you have
requested resistors and have not sent me your US mail address, please do
so now.  I will be going on vacation again on Aug 14th, so I have to get
them out by then.

Thanks for your patience.  
-- 

Norm Strong  (strong@tc.fluke.com)
2528 31st S.   Seattle WA 98144   USA
Newsgroups: sci.electronics
From: dcheenne@unlinfo.unl.edu (Dominique J. Cheenne)
Subject: Audio test equipment for sale
Keywords: audio,sale
Organization: University of Nebraska - Lincoln
Date: Tue, 21 Jul 1992 16:14:24 GMT

Test Equipment for sale
-----------------------

1) Leader LSW500/LBO500 Frequency analyzer: 2 channels, 20Hz to 300KHz, large
monitor, precision generator with markers. Channel 2 storage, harcopy
capabilities, etc... Still manufactured by Leader. A new unit costs $7,500.00.
 This one is 6 years old,  in excellent condition, has manuals (owner +
service) and sells for $2,000.00.

2) Keithley 175A digital multimeter: 4 1/2 digits with autoranging, data
logging, references, conversion, etc... A precision instrument (bench type) in
excellent condition with all manuals. $300.00

4) GC5001 Frequency/period meter: 2 channels, 10 MHz ranith count,
interval, period, frequency, ratio, etc... with manual. $150.00

5) NLS MS215 oscilloscope: Miniature unit with 2 channels, 15 MHz.  Very small
(8" x 6.4" x 2.9"). Rechargeable batteries. With probes and manuals. $300.00

6) RCA WP707 power supply: 2x25V/2A. A wonderful unit, very reliable and
excellent noise performance. With manual. $200.00

7) Leader LM181 millivoltmeter: Precision unit for low level measurements. In
excellent condition with manual. $135.00

8) IQS FFT Analyser. Apple II based. Model 401 LX, 50 KHz with pulse generator
and built-in preamplifier. Complete with computer (2 floppies, monitor, etc..)
and all software. An excellent unit for loudspeaker investigation and basic
acoustical measurements. $900.00


Dominique J. Cheenne

dcheenne@unlinfo.unl.edu
(402) 474-2215
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Re: Radar Detectors, and Radar Detector Detectors
Date: 28 Jul 92 18:39:24 GMT
Organization: Kernel Mode Consulting, San Diego, CA

In article <1992Jul23.204831.28487@news.columbia.edu>, gmw1@cunixa.cc.columbia.edu (Gabe M Wiener) writes:
> In article <92Jul23.162259edt.176@orasis.vis.toronto.edu> oliverb@vis.toronto.edu (Oliver Bengtsson) writes:
>>   Could someone out there please tell me how a radar detector detector
>>works? I thought that a radar detector was a passive device, nothing more
>>than a receiver tuned into detect a certain radio frequency used in radar
>>guns. If this is the case, how can they be detected?  
> 
> All receivers work by resonance, and this resonance can be detected with
> the appropriate equipment.

Nonsense.  Oh, this is possible theoretically, but practically speaking it
would be next to impossible to do at any useful working distance under field
conditions.  

Radar detector detectors (and Britain's TV detector vans) operate by detecting
spurious emissions from the receiver.  In the case of the radar detector, the
emissions come from the local oscillator.  In the case of the TV set, a TV
radiates ALL KINDS of hash, mostly harmonics from the horizontal scan
frequency.  

	--- 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
Newsgroups: sci.electronics
From: ssave@ole.cdac.com (Shailendra Save)
Subject: Re: Life after CDs
Organization: CDAC, WA
Date: Thu, 30 Jul 1992 16:45:45 GMT

In article <1992Jul29.175512.611@cmkrnl.com> jeh@cmkrnl.com writes:
>In article <1992Jul27.212455.18334@ole.cdac.com>, ssave@ole.cdac.com 
>(Shailendra Save) writes:
>>    The dots are spaced out more as you go to the outer edge of the disc, since
>> the radial speed increases as you go from inside to the outside. I wish they could
>> decrease the speed of the disc as the laser pickup reaches the outside of the disc, 
>> and store more stuff on it.  What do you think?
>
>What you're asking for is how CDs work *now*.  That's why they're called 
>'constant linear velocity' (CLV).  The rotational speed is reduced as the
>pickup moves from inner to lower tracks.  Thus the dots-per-linear-inch is the
>same on all tracks, inner and outer.  
>
>	--- 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


   Thanks all for the reply (replies).  Is it possible to have the same CLV
for magnetic discs?  (as in the hard disks of computers?)  Would have an interesting
algorithm for sector mapping, but it should work, wouldn't you think?


-Shailendra
ssave@ole.cdac.com
Newsgroups: sci.electronics
From: orscholz@immd4.informatik.uni-erlangen.de (Oliver Scholz (Turo - Backstage))
Subject: Re: MC1377
Organization: CSD., University of Erlangen, Germany
Date: Wed, 22 Jul 1992 14:05:31 GMT

markz@ssc.wa.com (Mark Zenier) writes:
[...]
>4. The way the color burst is generated is hokey, but you can override it.
 Well, then how do you do it? Any simple way? What I liked about the 1377 was
the simplicity of the concept...

-Oliver

>Mark Zenier  markz@ssc.wa.com  
-- 
----------------------------------------------------------------------------
Oliver Scholz                                                         DG4NEM
Graduate Student of Computer Sciences at the University of Erlangen, Germany
"You're killing me, Peg!"  "Oh, shut up, Al, like I care..." 
Newsgroups: sci.electronics
From: shiv@bnr.ca (Shiv Naimpally)
Subject: Re: MIDI -> Sync 24
Reply-To: shiv@bnr.ca (Shiv Naimpally)
Organization: Bell-Northern Research Ltd.
Date: Wed, 29 Jul 92 18:22:43 GMT

There is a Korg box that will do MIDI -> Sync 24 conversion - I've seen a few around at used music stores. I think Yamaha also had a box that did tape sync/MIDI/Sync 24 conversion. I've seen both the Korg and Yamaha boxes at various times in used instrument stores. Try Rogue Music in New York - they are one of the biggest used stores around. Caruso Music, Daddy's Junky Music and Sam Ash also have used (as well as new) stuff. Rogue, Caruso, and Sam Ash advertise in Keyboard and Electronic Musician. If you c





an't find the phone numbers, email me (shiv@bnr.ca) and I'll get them for you.


Good luck !


Shiv
Xref: sparky sci.electronics:13364 comp.sys.ibm.pc.hardware:20365
From: mikey@slic.cts.com (Mike Shirley)
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
Subject: Re: Airport X-Rays
Date: 27 Jul 92 03:13:36 GMT
Organization: Muth Valley Seismic Control District, San Diego, CA / Node 2

pjh@mccc.edu (Pete Holsberg) writes:

> As a follow-up branch of this topic, let me ask, "how is checked luggage
> examined? -- XRay, metal detector, ???" I put a DAT tape in my checked
> luggage but haven't tried to read it yet.

Xray'ed if it's done at all.

--
     Mike, WB6WUI   //   INET:  mikey@slic.cts.com   //   GEnie: SLIC
Newsgroups: sci.electronics
From: jeremym@fraser.sfu.ca (Jeremy Thomas McDonald)
Subject: Are there any large PALs/GALs?
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Thu, 23 Jul 1992 00:46:41 GMT

I was wondering if there are any PALs/GALs that have a large number of D flipflops.  I need to implement two 12-bit counters and a 15-state FSM and and 8-bit
register.  I also need three 8-bit I/O ports.  I want to design a controller
to act as a pseudo-Dual port RAM controller, with a high speed 20ns RAM chip
(single ported) attached to one of the ports on the PAL/GAL, and the PAL/GAL
acting as a time slicer for the RAM.  One port on the PAL is read-only, the
other is write-only.
Any help in this area would be much appreciated, as going with external
MSI logic eats up tons of board space.  Thanks.
e-mail to: jeremym@fraser.sfu.ca
From: kfree@pnet01.cts.com (Kenneth Freeman)
Newsgroups: sci.electronics
Subject: Re: Shock the Monkey
Date: 25 Jul 92 05:16:23 GMT
Organization: People-Net [pnet01], El Cajon CA

When I was a tyke I used to talk to the lamp post in the backyard. 
One afternoon when the lawn was nice and wet, I stuck gardening shears
into the outlet, buzzed for several seconds, and pulled the shears out. 
I decided Mr. Lamp Post didn't want to be my friend anymore. (My folks
were amazed when I told them this story decades later.)
---
Treat with respect the power you have to form an opinion. -Marcus Aurelius
UUCP: {ucsd nosc}!crash!pnet01!kfree INET: kfree@pnet01.cts.com
Newsgroups: sci.electronics
From: berger@atropa (Mike Berger)
Subject: Re: 0.100" spacing
Organization: University of Illinois at Urbana
Date: Mon, 27 Jul 1992 19:28:32 GMT

>adw@cci632.cci.com  writes:
>>  Now, I have another question! Previously, I've been drilling holes for my
>> IC's with a drill press, which isn't so bad for the small 16 pin IC's.
>> I can usually eyeball where the drill press will drill with reasonable
>> accuracy, and any variation can be compensated by bending the pins of the
>> IC socket or IC to fit.
>> 
>>  However, I have a 64 pin IC that I want to put on a circuit board. I don't
>> wish to have to get a stronger eyeglass prescription after drilling the holes.
>> So does anyone have any techniques or equipment that they use to drill these
>> types of things?
>> 
>>  My fantasty drill press accessory is a X-Y sled that fits on the bench of the
>> drill press. This sled would have clips that my circuit board attaches to. When
*----
You can get an auxilliary chuck for tiny drills that has its own
clutch built in for much more precise control.  If you use standard
photo patterns for a PC board, the little etched spot in the middle
of the pad is enough to guide the bit in if you exercise care.
The chucks run about $ 200.

You can also get a stage that allows precise movement of your work
as you described.  But considering the price range, you'd probably
be better off having your boards professionally made.
--
	Mike Berger
	Department of Statistics, University of Illinois
	AT&TNET     217-244-6067
	Internet    berger@atropa.stat.uiuc.edu
Newsgroups: sci.electronics
From: aaronb@suhana.analog.ingr.com (Aaron B.)
Subject: WANTED:  Dead VCR
Keywords: Broken VCR
Reply-To: aaronb@suhana.analog.ingr.com
Organization: Home Office Enterprise
Date: Fri, 31 Jul 1992 01:19:56 GMT

Hi Netters:

I need a VHF tuner for my project.  Someone suggested me salvaging it
from a broken VCR.  Anybody that have such a thing or know of how to
get them please respond by e-mail.  Any other suggestions are welcome too.

Thanks in advanced.

Aaron B
aaronb@suhana.analog.ingr.com
From: walvdrk@research.ptt.nl (KEES VAN DER WAL)
Subject: 25KV (was: SHOCKING STORIES)
Organization: PTT Research, The Netherlands
Date: Thu, 23 Jul 1992 18:21:45 GMT

In article <1992Jul22.145523.261@bony1.bony.com>, billg@bony1.bony.com (Bill
Gripp) writes: 

> natural reaction was to grab that wire so he wouldn't fall.  Only
> problem was that wire provided 11kVAC to drive the electric trains.  He
> said his brother only survived because the path the current took through
> his body did not pass through his heart.

This morning there was a story on the BBC-news that a boy survived a 25KV shock 
from an overhead railway line. I didn't catch how he came into contact with the 
line; he's in hospital now.

<kees>
From: jeff@felix.filenet.com (Jeff Wallace)
Newsgroups: sci.electronics
Subject: Embedded Systems Mag BBS?
Date: 25 Jul 92 00:41:07 GMT
Reply-To: jeff@fritz.filenet.com (Jeff Wallace)
Distribution: usa
Organization: FileNet Corp., Costa Mesa, CA


	Is the 415-905-2689 the correct phone number for the Embedded
Systems Programming magazine's BBS?  If so, what hours is the BBS
available?  I can't ever get an answer.  Thanks.


-- 
			Jeff Wallace
			jeff@filenet.com
			hplabs!fritz!jeff
			FileNet Corp. Costa Mesa, CA
Xref: sparky sci.electronics:13276 rec.audio:10812 alt.folklore.computers:11098
From: curt@oasys.dt.navy.mil (Curt Welch)
Newsgroups: sci.electronics,rec.audio,alt.folklore.computers
Subject: Re: Life after CDs
Date: 24 Jul 92 21:45:32 GMT
Reply-To: curt@oasys.dt.navy.mil (Curt Welch)
Followup-To: sci.electronics
Organization: Carderock Division, NSWC, Bethesda, MD

In rec.audio, jsimon@rchland.vnet.ibm.com (Gerald Simon) writes:
>This may sound stupid but, when I look at the back side of a CD (the side
>the music is on), the light reflected back in the first part of the CD
>(usually less than 1/4 inch from the outside) differs from the light reflected
>back from the rest of the CD.  I've always assumed that's the portion of the CD
>where the music is recorded.  If that assumption is correct, than there is
>a LOT of space left over for additional music over the rest of the CD....How
>wrong am I?

Only a little.  CDs are backwards from LPs.  They start in the center and work
outwards.  The small outer section is the blank part, the large inner section
is the music.

Curt Welch
Contractor working for Code 3531
Carderock Division, Naval Surface Warfare Center
Bethesda, MD
(301) 227-1428
curt@oasys.dt.navy.mil

/-----------------------------------------------------------------------------\
| Curt Welch - KCW Consulting           By 1995, there will be just two kinds |
| curt@kcwc.com - NeXTmail please!      of professionals:  Those who use NeXT,|
| (703) 938-4152  FAX (703) 938-5756    and those without Jobs.               |
\-----------------------------------------------------------------------------/
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
From: nolan@tssi.com (Michael Nolan)
Subject: Re: Airport X-Rays
Reply-To: nolan@tssi.com
Organization: Tailored Software Services, Inc.
Date: Sun, 26 Jul 1992 21:52:20 GMT

pjh@mccc.edu (Pete Holsberg) writes:

>In article <14pecvINNn1a@darkstar.UCSC.EDU> ted@helios.ucsc.edu (Ted Cantrall) writes:
>=Someone who travels often should do us all a favor and experiment. Pack
>=360K, 1.2M and 1.4M disks with data (one big ZIP file, perhaps) and put
>=them in the luggage that will be X-rayed. Trying to unZIP the file will
>=reveal if any of the data has been corrupted. If several people do this
>=in several airports (a variety of X-Ray equipment) and post the results,
>=we'll all know for sure.

>I, for one, can report that a 1.44MB 3.5-inch MS-DOS diskette made it
>unscathed through two X-ray machines -- Philadelphia and Birmingham, AL.
>The diskette was in a pocket of my Lands End attache case that rode down
>the belt.

On the other hand, I had a 720K 3.5" diskette that I forgot to take out
of my computer's carrying case before it went through the X-ray scan and
it now gives me read errors, although so far at least a couple of retries
has always done the trick.  (And I've compared the results with an earlier
install and the files are identical.)  Given my choice, I'd pull the
diskettes from the case.
---
Michael Nolan, nolan@tssi.com      "Freedom of the press is still alive in    
Tailored Software Services, Inc.    America, at the U. S. Mint"  (Gallagher)   
Lincoln, Nebraska (402) 423-1490  
Newsgroups: sci.electronics
From: klopfens@andy.bgsu.edu (Bruce Klopfenstein)
Subject: Dallas Video on Demand Test
Keywords: video broadband digital Dallas
Organization: Bowling Green State University B.G., Oh.
Date: Sat, 25 Jul 1992 13:16:47 GMT


According to the 13 July 1992 issue of TELEVISION DIGEST,
USA Video wants to test a video-on-demand service this fall
"using one of Southwestern Bell's 2 fiber testbed communities
outside Dallas."  The technology was tested in SW Bell's lab
in St. Louis in June.  A compressed movie can be delivered to
the home in 3 1/2 minutes using the "equivalent of less than
10 standard video channels for rapid delivery."

USA Video has a research operation in Dallas.  I'd like to
learn more about this venture including what SW Bell's "fiber
testbed communities" are.  In addition, I'd like to create a
current list of such projects and will be glad to share the
results with comp.dcom.telecom readers.

Please feel free to send email directly to me.  The Dallas
project is of special personal interest as I may be able to
take a sabbatical there in 1993.

Thanks very much.


Bruce C. Klopfenstein             |  klopfens@andy.bgsu.edu
Department of Telecommunications  |  klopfenstein@bgsuopie.bitnet
322 West Hall                     |  klopfens@bgsuvax.UUCP
Bowling Green State University    |  (419) 372-2138; 372-2224 
Bowling Green, OH  43403-0235     |  fax (419) 372-8600
-- 

Bruce C. Klopfenstein             |  klopfens@andy.bgsu.edu
Department of Telecommunications  |  klopfenstein@bgsuopie.bitnet
322 West Hall                     |  klopfens@bgsuvax.UUCP
Xref: sparky sci.electronics:13697 alt.folklore.urban:20223