HDTenEightyP/NetNews huggingface dataset:
Newsgroups: sci.electronics
Subject: Walkman Modification
Date: Fri, 08 Jan 1993 12:59:00 -0600

On 12-16-92, Martin Emde wrote to All:

>------------------------------------
Does anyone know how to modify a simple walkman FM receiver to operate
in the 108-136Mhz range (aircraft voice communications) or know if 
something like this is even possible?


>------------------------------------
Your fundamental problem is not frequency coverage, but the fact that 
aircraft communication uses AM, not FM!  So you'd have a double whammy to 
deal with.

Probably you'd want to start with an old transistor portable, where you 
could modify things at the component level -- the tiny newer guys are more 
likely to have most of the receiver integreated onto a chip.  You could 
probably pretty easily tune the thing higher, and replace the FM 
discriminator with an AM detector.

That's if you're the experimental type.  Why bother when you can probably 
get an older scanner for peanuts?

___
 * Freddie 1.2 * CW: It don't mean a thing if it ain't got that swing!

Xref: sparky sci.electronics:22127 rec.aquaria:9860
From: pjs@gvgdsd.GVG.TEK.COM (Peter J. Stonard)
Newsgroups: sci.electronics,rec.aquaria
Subject: Re: High Efficiency Fluorescent Lighting
Date: 6 Jan 93 20:47:52 GMT
Organization: Grass Valley Group, Grass Valley, CA
NNTP-Posting-Host: gvgdsd.gvg.tek.com

In article <1993Jan6.022928.22542@ee.ubc.ca> 
jmorriso@ee.ubc.ca (John Paul Morrison) writes:
>In article <1993Jan5.055326.2966@klic.rain.com
> keithl@klic.rain.com (Keith Lofstrom) writes:
>
>
>[ high frequency flourescents ]
Great post about Keith's experience of replacing office 
lights with electronic ballasts.

>How much are the high-frequency ballasts, power conversion 
>(60 Hz to whatever kHz)?
>
>And most of important, where do you get them? I strongly suspect the local
>lighting hardware guys are going to say 'duuuuuhhh?' when I ask for this.

I have been researching this recently. In the aquarium hobby we
sometimes get interested in fluorescent lighting and there has been a
recent thread or two in the *.aquaria groups.

I saw replacement ballasts at Lumberjack and Home Depot, two large
home improvement places. They had both the core-coil (inductor ballast-
transformer) and the equivalent electronic type. The electronic
type are about twice the cost at $48US for 2 x 40W 4ft size. (In
Keith's original post he said $36, I think).

According to one manufacturer the electronic ballasts operate at
24kHz, and drive the lamps at 92% of the light produced by 60Hz
operation. The higher frequency reduces the flicker and gives an
'apparent' increase in brightness. The colour temperature is not 
changed. This contributes to the improvement in efficiency of the
electronic types over the core-coil ballast-transformers.

For a 2 x 40W fixture the core-coil system draws 96W at 0.92 PF,
or 16W of heating in the ballast.

The electronic ballast driving 2 x 40W bulbs draws 72W at 0.98 PF.
A savings of 16% is claimed for the electronic ballast, which implies 
that each lamp consumes about 30W but I haven't confirmed this yet.

In each case these are standard lamps. There are HO and VHO
lamps too, which are not compatible with these ballasts. Their
operating current is:

STD	(standard)		0.430A
HO	(high output)		0.800A
VHO	(very high output)	1.500A

I've cross posted this to rec.aquaria so that we may share this
and any new information. Please edit out rec.aquaria if your
follow ups don't apply.

++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++
Peter J. Stonard        +                                /^\  /^\
Grass Valley Group      +                       /^\     /   \/
Grass Valley, CA. 95945 +                     /     \ /    /  
pjs@gvgspd.gvg.tek.com  +     Fish keeper in the Sierra Foothills
++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++
If it looks like; sounds like; quacks like; an Opinion. It's mine.
Newsgroups: sci.electronics
From: cn0gr8af@hydra.unm.edu (Student Class Account)
Subject: Re: Pen or Stylus PINOUTS for Summa Graphics Tablet 1208 (or something like that)
Date: Fri, 08 Jan 93 03:11:53 GMT
Organization: University of New Mexico, Albuquerque

In article <6xzr!a+@lynx.unm.edu> cn0gr8af@hydra.unm.edu (Student Class Account) writes:
>I would like to make a Pen input for my SummaGraphics Professional 18x12"
>digitizing tablet (with the 4 Button puck).  I believe the model # is mm1208 
>or mm1808 (or something similar).  There is a 9 pin port provided for such a 
>device, and although I could probobly buy one, I would like to make it.
>
>I would welcome any information on Pinouts for this port, plus any other 
>info on how these things work that anyone deems useful.
>
>Many thanks in advance,
>Rusty
>
>

Oops, please reply to cn0gr8af@hydra.unm.edu  or  rfj112@rsphy1.anu.edu.au

Newsgroups: sci.electronics
From: michthom@bnr.ca (Michael Thomson)
Subject: Ancient Scope Info Required! (Tektronix Type 564)
Organization: BNR Europe Ltd, Maidenhead, UK
X-Newsreader: TIN [version 1.1 PL8]
Date: Tue, 5 Jan 1993 16:09:43 GMT

I am looking for _ANY_ info on the care and feeding of the old Tektronix
scopes. I recently aquired a 20 MHz dual trace storage scope, but the
calibration is miles out, and the switches need attention. The scope has
plug-in timebase and amplifier modules as listed below.

Oscilloscope		Type 564 

Timebase		Type 2B67 \ Plug-in modules
Dual trace amplifier	Type 3A72 / 

If you can't provide info on these particular beasties, but have stuff on
related modules / scopes, please contact me!

These scopes were valve-based, and Tektronix no longer retain the manuals or
provide any type of support for them. The scope has already allowed me to fix
an ailing computer, so I won't let it go without a fight.

Please post responses as follow-ups to this post, as I can't get E-mail.

--
*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
+    Michael Thomson   + The opinions expressed here, while definitely NOT  +
+    BNR Europe Ltd.   + those of my employer, may OR MAY NOT be mine!      +
+ Phone +44 628 794416 + --------------------------==========-------------- +
+   Fax +44 628 776017 +        This space intentionally left blank         +
*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Newsgroups: sci.electronics
From: lsg001@cck.coventry.ac.uk (Graham Wilson)
Subject: .
Organization: Legal Department - Coventry University
Date: Wed, 6 Jan 1993 11:41:14 GMT


** I was wondering whether people might be able to answer a question for
   me ?

   While walking around Texas (DIY store) the other day I came across a 
   "power saver" device. This box, the size of a double-adaptor plug, is
   designed to replace the conventional plug on a domestic fridge / freezer.

   According to the blurb on the back, the device helps to save 40 - 60 %
   of the electricity which the freezer would normally use. When the unit
   is "saving" electricity a red light on the front of the saver plug 
   comes on.

   The unit costs 25 pounds and according to the cost saving information 
   printed on the carton this unit would pay for itself in approximately
   one year.

   What I wanted to know was how does this unit operate the freezer 
   while using less electricity ? If the unit does work, why don't they
   fit these devices as standard to freezers and other equipment ? 

   Thanks.


   
-- 
         *********************************************************
         *      Graham Wilson      *  lsg001@cck.coventry.ac.uk  *
         *     LL.B.  Law  III     *     Coventry  University    *
         *********************************************************
From: dly@joule.elee.calpoly.edu (Dixon Ly)
Newsgroups: sci.electronics
Subject: looking photoemitter/detector arrays
Date: 7 Jan 93 20:05:44 GMT
Organization: California Polytechnic State University, San Luis Obispo

Hi all,
I am working on a set of sensors for a robot.  I am thinking of using
a laser diode emitter and an array of detectors.  I've read
about such a setup where the emitter/detectors are built into one
device with each in separate chambers.  The emitter gives off a beam and
is reflected of the target back to the detector array through a narrow slit.
Depending on which element of the array the reflected beam hits, the target's
distance from the source can be calculated using triangulation.  

But neither my advisor nor i know of a  company that produces such a device.
If you know of such a device out in the market, we would really appreciated
if you drop us a line. 

Please reply thru email as i dont want to lose any responses that might
get accidentally lost as i glanced thru the subject lines.

You can reach me at dly@joule.elee.calpoly.edu
						 
or if you have any literature on the subject, you can mail them to me
at    1144 Orcutt Rd. #E
		San Luis Obispo, CA 93401
		U.S.A.


		I thank you in advance.
		-Dixon

   Dixon D. Ly
     dly@pan.calpoly.edu
     dly@joule.elee.calpoly.edu
     Electrical and Electronic Engineering Department, Cal Poly - SLO
From: mpaul@unl.edu (marxhausen paul)
Newsgroups: sci.electronics
Subject: Re: tone decoder
Date: 11 Jan 1993 17:24:05 GMT
Organization: University of Nebraska--Lincoln	
Distribution: world
NNTP-Posting-Host: unlinfo.unl.edu
Keywords: tone decoder 567

With the 567, you can optimize it for bandwidth (how far your signal can
deviate frequency-wise and still be locked) or speed of capture (how quick
it locks in) and a couple other things, but some of them are exclusive of
each other - you can't have it all.  Getting the 567 to lock and release
at very high speed is tough, maybe even impossible.   I'm sorry I don't
have the data book handy, but when I did a project with these a while
back I had to do a LOT of experimenting with capacitor values to find the
optimal balance of bandwidth and speed, and stability.  I really needed
very tight bandwidth; as a consequence, my 567 circuit took about a 
half-second to turn on and almost a full second to "let go" when the
signal went away.  

--
paul marxhausen .... ....... ............. ............ ............ .......... 
 .. . .  . . . university of nebraska - lincoln .  . . .. . .  .. . . . . . . .
 .     .    .  .   .     .   .  .    .   .  .   .    .   .  grace .   .    .  . 
   .         .       .      .        .        .      .        .   happens .     
From: efbasham@hp-ptp.ptp.hp.com (Everett Fred Basham)
Date: Mon, 11 Jan 1993 05:58:19 GMT
Subject: 860-900 MHz Band Pass Filters
Organization: HP Pacific Technology Park - Sunnyvale, Ca.
Newsgroups: sci.electronics

I have a large quantity of Cellular Band Pass Filters available.  The pass
band is 860-900 MHz (easily passes the output frequency of the cell system).
These are ideal for use with outdoor antennas that bring in many unwanted
signals.  I have not yet measured the pass/reject attenuation, but if you
are interested, email and I'll test one.

The filters are manufactured by muRata-Erie and were originally intended
for use in the construction of cellular telephones.  They are 1.5 cm
square, 0.9 cm thick, and have a mounting flange on the bottom that
extends 0.5 cm away from the metal enclosure.  The input and output 
leads are each 0.5 cm long.  These are a 3 terminal, passive device.
They are also uni-directional (marked on case).  Although designed for
surface mount, you can solder coax directly to the device or bend the
leads 90 degrees and insert into a PC board.

I suppose they could be used with scanners to reduce desense from
unwanted signals by placing them in an RF tight case with BNC
connectors in and out.  This could then be attached to the antenna
port when desired, but of course it would be unnecessary since NOBODY
listens to those frequencies with a scanner.  But since these are
intended to go inside cellular telephones, I'll just assume anyone
interested is designing / mfg'ing cell fones!

Price is $4/ea. plus $1.50 to ship inside the US by US Mail. (I can
send about 6 of these for the $1.50; they're lightweight)  I'm selling
these because I have enough to last a lifetime, especially since I
don't listen between 860 and 900 MHz!  For info - reply by email.

Everett Basham
"I didn't express any opinions, neither did my employer!"
Xref: sparky sci.electronics:21957 rec.video.satellite:7553
From: apn@Apple.COM (Alex Novickis)
Newsgroups: sci.electronics,rec.video.satellite
Subject: Re: VIDEOCRYPT encryption system by Fergusson
Date: 5 Jan 93 00:14:53 GMT
Followup-To: sci.electronics
Organization: Apple Computer Inc, Cupertino, CA

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).
>
>How does it do the encryption? Is it based on wiggling sync
>pulses? Or maybe on jumbling up video scan lines? Or maybe
>something else?
>
>Anybody know?
>
>Cheers,
>Geoff.

I don't know the specifics, but here's what I did to find out about
the ones we have in our area:

There are usually some patent #'s written on the bottom of the box.
These and a few hours at the patent office produced several hundreds
of pages of pretty much the exact "secrets" I was looking for.


-- 
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.
Xref: sparky sci.electronics:22446 comp.music:6053
From: stuart@amc.com (Stuart Poulin)
Newsgroups: sci.electronics,comp.music
Subject: E510 keyboard scanner to midi?
Keywords: midi e510
Date: 12 Jan 93 00:02:22 GMT
Article-I.D.: amc.1993Jan12.000222.4579
Organization: Applied Microsystems, Redmond, WA

Anyone know of a E510 keyboard scanner to midi chip?  Who makes it and
where to get one in the U.S.?

I'm looking for a fast easy way to convert contact closures into midi.
I don't need velocity, just note-on, note-off, values.

Any information or advice is greatly appreciated.

Stuart Poulin
stuart@amc.com
From: babb@sciences.sdsu.edu (J. Babb)
Newsgroups: sci.electronics
Subject: Re: HELP - Composite Video to RGB conversion.
Followup-To: sci.electronics
Date: 6 Jan 1993 00:56:21 GMT
Organization: SDSU - LARC
Distribution: world
NNTP-Posting-Host: larc.sdsu.edu

In article <1993Jan5.154546.21568@cm.cf.ac.uk>, Andrew.Stratton@cm.cf.ac.uk
(Andrew F Stratton) wrote:

 
 > I desparately need some help - converting the Composite Video output
 > from a VCR to an IBM PC svga Monitor.
 > 
 > I already have a Sync separator circuit diagram (for HSync and Vsync),
 > so I don't need them to be part of the circuit (though I don't mind if
 > they are).  I also have the audio separately - and will play it through
 > my HiFi.
 > 
 > I gather that the svga monitor is 5volt - but I can easily convert 12v
 > to 5v - if that is what comes out.
 > 
 > I have heard that there is an IC available that does the whole thing (or
 > thereabouts) - does anyway know of it?
 
Ya know what,
 My boss presented me with the same problem!! We have a Sayett graphics
projector that she wants to pump video thru now!! Sayett want $1000 (!!)
for a 'Universal Video Decoder' I think Motorola makes a video->RGB
convertor chip, so I'm going there after work, and I'll let you know what I
find. My question to you is: Is sync on a separate pin on VGA connector,
does anybody know where sync is on Macintosh video connectors? I've heard
it can be composited with the Green signal. If so, I'll need that sync
separator circuit :-) !!
From: cyberman@toz.buffalo.ny.us (Cyberman)
Newsgroups: sci.electronics
Subject: Re: Soundblaster for low
Date: 1 Jan 93 17:10:15 GMT
X-Maildoor: WaflineMail 1.00r


  Sir - Heitmueller spoke forth saying:
"Re: Soundblaster for low" toward 
 on 12-30-92  04:10
 S-H> Well the perfect device you can use is your joystick port on your PC.
 S-H> port to measure analog signals and it works quite well.

The soundblaster me thinks has joystick ports.

                Stephen Cyberman@Toz.Buffalo.NY.US
             Mangled on Thu  12-31-1992  at 13:02:09

... He who dies with the most TAGLINES wins!
---
 * Blue Wave/QWK v2.11 *
                                                   
Newsgroups: sci.electronics,comp.dsp,comp.realtime
From: Gary  Truemner <truemner@rd.hydro.on.ca>
Subject: Re: Need info on ultrasonics
X-UserAgent: Nuntius v1.1.1d12
X-XXMessage-ID: <A7721757F702C8B9@pc-truemner.rd.hydro.on.ca>
Organization: ONTARIO HYDRO Research Lab
Date: Thu, 7 Jan 93 22:26:45 GMT
X-XXDate: Thu, 7 Jan 93 17:22:31 GMT

Date: Wed, 6 Jan 1993 14:15:31 GMT

Polariod I think still sell a development kit to microprocessor FOR auto-focus
type ultrasonic distance measurement...if this is your application ?

OR  Krautkramer-Branson USA sell industrial ultrasonic instruments used for
weld flaw detection etc. which store measurement data and download to PC
spreadsheet
software ie. K-B USN50 instrument ??

------      |        |Truemner@ice3.kcps.rd.hydro.on.ca
|        |      |        |   GARY TRUEMNER (416)207 6380 FAX:(416)237 9285 
|        |      ------ONTARIO HYDRO.Automated NDT&Welding.R&D Lab     
|        |      |        |   800 Kipling Ave.M/S KR172.Toronto.Ontario.M8Z 5S4 
------      |        |   _a Never Ending Story believer.avoid the NOTHING
Xref: sparky sci.electronics:22146 sci.energy:6693 rec.autos:31127
From: ems@michael.apple.com (E. Michael Smith)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flywheel batteries as EV power source
Date: 28 Dec 92 22:09:47 GMT
Organization: Circle 'C' Shellfish Ranch, Shores-of-the-Pacific, California

In article <1hnnrdINNnna@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
>In article <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com>, () writes:
>=Obviously this fluff created by a failed flywheel is not exactly safe.  But
>=you contain this fluff inside another carbon carbon shell such that the
>=expanding hot fluff makes more fluff until the energy is such that it can
>=be contained by a container.  The object is not to stop the flywheel failure
>=at any given point, but to slow it down and cause it to loose energy.  
>
>Yup.  Now, since someone has calculated that the flywheel is storing enough
>energy to VAPORIZE 40 kilograms of iron, just how big is your containment
>system going to be?  Will there be room for people in the car?

Hmmm ... an interesting question arises from this oft' posted phrase
'VAPORIZE 40 kilograms of iron' ...  Since this is only 88 lbs of
stuff (and my car weighs about 2000lbs) it isn't THAT much of a 
weight penalty ...  So just how much of a very high heat of vaporization
substance would it take to absorbe the heat as phase change?  Say, for
example, water?  (Or whatever is even better suited...).  If one could
wrap the flywheel in a 200 lb water jacket and still be lighter than
a lead/acid battery pack, it might still be 'reasonable' ...

Now, getting all that KE dumped evenly into the water jacket could be
quite a trick ;-) and will be left as an excersize for the reader ;-) ;-)

-- 

E. Michael Smith  ems@apple.COM

'Whatever you can do, or dream you can, begin it.  Boldness has
 genius, power and magic in it.'  -  Goethe

I am not responsible nor is anyone else.  Everything is disclaimed.
From: wouter@blade.stack.urc.tue.nl (Wouter Slegers)
Newsgroups: sci.electronics
Subject: Re: Laser gunsights (was: Info on CO2lasers wanted
Date: 8 Jan 93 12:44:28 GMT
Organization: MCGV Stack, Eindhoven University of Technology, the Netherlands.
X-Newsreader: TIN [version 1.1 PL6]

jeh@cmkrnl.com wrote:
: In article <6802@tuegate.tue.nl>, wouter@blade.stack.urc.tue.nl (Wouter Slegers) writes:
: > I'd like to get some info CO2-lasers... I read the following on a BBS..
: > If anyone has a sequel on this, please email it to me..
: > [...]
: >                LASER WEAPONRY / PART 1 / LASER SIGHTS
: > [...]
: 
: I don't know about the circuitry provided... but the stuff in there about a 
: 2 mW HeNe laser being dangerous to human eyes is complete bunk.  
: 
This is not quit true: a 2 mW laser is enough concentrated to damage the eye
tissue if your looking right into it..

: I would also point out that the claim of "perfect targetting" for a laser 
: gunsight just isn't so -- elevation and windage still are factors -- and that
Correct, but it does give some extra targetting info..

: *seeing* the dot of light from a 2 mW laser at any reasonable distance, in 
: anything other than pitch blackness, is damned near impossible.  
: 
: 	--- 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

The file I appended to my message is not very good, I know (I downloaded it
from a weird BBS). I appended it in the hope someone would have the sequel
and would post/mail it.

--------------------------------------------------------------------------------
                                                   |
    (/^\)      It's time for the world to hear:    |         Disclaimer:
  /___o___\          Neue Regel is here            |     This was never sent..
 (   ).(   )     (Neue Regel, Queensryche)         |
    /|.|\                                          L----------------------------
     |.|
      |     Ash nazg durbatuluk, ash naszg gimbatul, ash nazg thrakatuluk,
      |      agh burzum-ishi krimpatul (Lord of the Rings, J.R.R. Tolkien)
--------------------------------------------------------------------------------
Newsgroups: sci.electronics,alt.cd-rom
From: kgdykes@thinkage.on.ca (Ken Dykes)
Subject: chip vendor databooks/sheets/applic notes
Organization: Thinkage Ltd.
Date: Tue, 5 Jan 1993 21:11:11 GMT

do any semiconductor makers have available on CD-ROM their databooks and
application notes?

seems to be an ideal way to avoid killing a few tonnes of trees per engineer.

people like me who cant really justify or squeeze out of sales people
sets of databooks wouldnt mind paying a 20-50$ for a CD-ROM.

my particular fascination this week is with MAXIM, EXAR and Motorola chips.

but i would be interested in hearing of any vendor/brand making CD-ROMs
available.

on a tangent to this: any of them using network/dialup/BBS accessability to
   their semiconductor data ?

    -ken, whose set of dead trees is from 1984ish for TI/Motorola/Intel/Signetics

-- 
   - Ken Dykes, Thinkage Ltd., Kitchener, Ontario, Canada    [43.47N 80.52W]
         kgdykes@thinkage.on.ca   postmaster@thinkage.com   thinkage!kgdykes
         harley-request@thinkage.on.ca             kgdykes@math.uwaterloo.ca
Xref: sparky sci.electronics:22290 rec.video.satellite:7690