PRC as a amplifier in GPS question.

On Stardate Tue, 23 May 2000 10:05:25 +0800, "David Emrich"
<demrich@ihgtech.com.au> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

D.A.Kopf <dak@dakx.com> wrote in message news:3929BE49.7F69DFAC@dakx.com...
Fred McGalliard wrote:

"Rowan Crowe (NoSpam)" wrote:

Hi all,

I am interested in experimenting with flourescent lights, powered from
a
nominal 12VDC source. I have a few questions...

1. What voltages and type of waveform are required to light a typical
flourescent tube?

The tubes light by low vacuum arc. You can rap one with a few KV to
start the discharge, dropping to a few hundred volts if you heat the
filament first, or use an RF discharge and a coupling foil near one end.
Once you initiate a discharge, you need to drag the charges across the
tube with enough voltage to see that every mean free path length they
gain enough energy to create a photon at the mercury line, and enough
more to occasionally generate an ion pair to replace the ones on the way
out. In a standard fluorescent tube, about a meter long, this drops to
about 60V, as I recall. It is directly proportional to distance between
the end plates. If you use a 60 cycle AC, the tube will try to quench
(the arc tries to discharge all the free ions and stop being an arc)
fast enough that you can get a nasty flicker. If you were driving this,
I would opt for a square wave with close to 100% duty cycle, so the
current in the tube is zero only very briefly during the transitions.
The problem is two fold. Generate enough voltage to excite an arc, and
then to feed it a steady current at a voltage determined by the tube
length gas pressure, and temperature. This is all the big ballast
transformers do. You do not need to heat the filament to start the bulb.
And in fact, with RF power, you can make it glow nicely without even
contacting the filaments at all.

Or use current-limited DC (e.g. the rectified output from a saturated-core
transformer) of a couple thousand volts per series lamp. No flicker, no
need
for starting filaments (recycle burned-out AC tubes). Over the sweet spot,
the
efficiency is independent of the voltage as the brightness mostly varies
with
the absorbed power. At least in theory, if it works let me know!


Of course, if you're doing a DC supply, you can always use a "cold end"
current mirror circuit (just make sure the transistors have enough) to limit
the current, and a cockcroft walton multiplier with high value capacitors
(like 47uF or so) in the first couple of "rungs" and low value caps (like a
couple dozen nF or so) (all high *voltage* of course). This way, before the
tube starts, the whole multiplier is active, and generates a high voltage on
the order of a few KV, but once the tube fires and starts drawing current
(limited by the current mirror), the low value caps don't hold enough charge
between cycles to keep up output voltage, and the multiplier effectively
becomes a two-stage multiplier (only the high value caps have any effect,
and the voltage dropped across the remaining diodes take a few volts off).

The same principle was used in a successful laser power supply in an
Electronics Today magazine, probably nearly 25 years ago now. Essentially
the same principle (high KV start, 1 KV run), just have to fiddle the
numbers a bit.

David.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
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On Stardate Wed, 24 May 2000 21:07:35 +0930, OneStone
<onestone@chariot.net.au> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

The LT1370 dc converter will easily supply 15V. It operates in a SEPIC
configuration for buck/boost, and can supply up to 2.5A IIRC. I have
designed a PSU that delivered 36W using only SMD parts, and PCB heat
shunts. I don't know if this will be enough for you. Of course you can
parallel them, or use FET's to boost the output. An even cheaper option
might be an MC34063 with a 30V 7A FET, 84W continuous and 480W in 10usec
bursts through the FET. haven't had cause to try that though.

Al

Mr Robin Fowler wrote:

Does any one have any ideas on the best way to get a regulated 15V DC supply
form a 12V DC battery? I would like to run my notebook from leadacid
batteries.

--
Mr Robin Fowler
Systems Engineer
Leopard Systems Pty. Ltd.
Suite 6, 214 Bay St, Brighton, Vic, Australia, 3186
Phone +61 (03) 9530 6722
Fax +61 (03) 9596 4469
Email robin.fowler@leopardsystems.com.au
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Tue, 13 Jun 2000 02:15:08 GMT, "Steve Spence"
<sspence@webconx.com> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

have you seen the 12 circuit at http://www.webconx.com/fluorescent.htm ?

--
--
Steve Spence
Renewable Energy Pages - http://www.webconx.com
Palm Pilot Pages - http://www.webconx.com/palm
X10 Home Automation - http://www.webconx.com/x10
sspence@webconx.com
(212) 894-3704 x3154 - voicemail/fax
If we don't believe in freedom of speech
for people who we disagree with, we don't believe in it at all.
--

"Joel Kolstad" <Joel.Kolstad@USA.Net> wrote in message
news:sk921q4uh516@corp.supernews.com...
"George L Ghio" <ghio@netconnect.com.au> wrote in message
news:310520001528533625%ghio@netconnect.com.au...
As is common in these news groups lack of information is rife. I have 2
20W fluoro lamps that have run for the last 14 years on 12 volts.

In my experience, 12V DC inverters tend to run fluorescent lamps well
below
the rated power of the bulbs. This greatly increases the bulb life, at a
slight loss of efficiency.

---Joel Kolstad
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
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On Stardate Sat, 17 Jun 2000 15:21:49 +0200, "PCS ELECTRONICS"
<you@know.me> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

Hello!

I updated the world's simplest FM transmitter schematic.
Its now more stable and gives more power, without
any additional parts. Don't expect stellar performance,
but it works and doesn't have any coils!

Check it at www.pcs-electronics.com in the
"Idiot's guide to pirate radio".

We also feature FM transmitters and accesories.
MAX-1, MAX-2 and PC-MAX are some of the known
names on the pirate radio scene.

There are also some new products to check,
for example frequency meter, PC-MAX...

Best regards,
Marko - PCS Electronics
www.pcs-electronics.com
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
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On Stardate Sun, 16 Jul 2000 01:58:39 +1000, "Col H"
<colstoney@dingoblue.net.au> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

For several years now, i've used an old reel motor from a VCR, basically
just a good quality 12v motor, i usually drive it with 20V to get more speed
though.
The shaft is a metric size 3mm i think, then a pin vice has a hole in the
'handle' end that is simply a push fit (interference fit) onto the shaft. I
have tried a small drill press but i find i can drill by hand much faster as
long as i have a small hole in the pad for a guide, sometimes its lacking so
i dent the pad with a scriber.
works ok.
i can drill probably a hole a second no problems this way.
For larger holes a use an arlec supertool (old one) which has very poor
bushes and floats around too much for the small stuff, but works ok for 2 or
3 mm holes.



"Russ.Shaw" <russell@webaxs.net> wrote in message
news:397043DE.441AE6BE@webaxs.net...
Kalex in ivanhoe, melbourne, sell some bigger drillers for pcbs.


Trevor Wilson wrote:

"Rob Symmans" <robsymmans@q-vis.com> wrote in message
news:8kones$iqf$1@enyo.uwa.edu.au...
Is anyone aware of a source of a small drill press for PCB work?
Computronics used to sell one but have discontinued. Any leads greatly
appreciated.


**You can't beat a Dremmel. 30,000RPM, with a carbide bit (from
Farnell).
Like slicing through warm butter. The drill press part, is a little more
difficult. Dremmel seel a bewildering array of attachments, for their
products. This includes a nifty drill press. It's gonna be expensive,
though. Worth every cent, IMO.

--
Trevor Wilson
www.rageaudio.com.au

--
*******************************************
* Russell Shaw, B.Eng, M.Eng(Research) *
* email: russell@webaxs.net *
* Australia *
*******************************************
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Sat, 12 Aug 2000 05:29:42 GMT, pteybiesla@gil.com.au (Paul
Desmond Tybislawski) applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

On Thu, 10 Aug 2000 01:28:16 +1000, "Rowan Crowe (NoSpam)"
rowan-ns@sensation.net.au> wrote:

On Wed, 9 Aug 2000, Trash wrote:

I can't see why it would not be posible to send even 1200bps with
just a world modem chip and a bit of wiring to a hands free plug etc.

Don't forget that GSM uses encoding and decoding that is specifically
designed for *speech*, if you try to put other audio waveforms through a
GSM mobile then don't expect them to come out at the other end
perfectly...

as an aside, i was wondering just recently, if you send dtmf tones to
an IVR or answer-machine etc, is this handled differently by a gsm
phone or is the dtmf just suited to gsm audio path?


Recent additions such as EFR (Enhanced Full Rate) may lessen the
"garbaging" effects of the encoders, I am not sure of this.

BTW, 30cps (assuming 10 bits per byte) will end up pretty costly if you
are an Australian mobile customer. ;-) If you pay 60c per minute, an 18k
file transmit will cost you $6.00.

BTW2, GSM itself natively supports 9600bps - and I've seen a phone with
19200bps but I don't know if this is standard. I believe the phone end is
all digital, and at some point in the network in a digital->analog
landline call, normal analog modulation/demodulation of the signal occurs.
I am only guessing here, but I wouldn't be surprised if a mobile to mobile
call does not have any analog mod/demod component.

Cheers.


--
Note: rowan-ns is actually a valid address, aliased to my REAL one. Remove
the '-ns' to reach my real email address directly.

Rowan Crowe http://www.rowan.sensation.net.au/
Sensation Internet Services http://www.sensation.net.au/
Melbourne, Australia Phone: +61-3-9388-9260


Paul Desmond Tybislawski, there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Fan Pages | is to blame!... and perhaps, Love (is/can be)
www.home.gil.com.au/~ptybisla | "Fully expecting to be Hurt!"
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Wed, 16 Aug 2000 19:59:34 GMT, mzenier@netcom.com (Mark
Zenier) applied digits to the keyboard and routed the information from
some kind of brain (presumably), thusly:

In article <966378807.320764@nntp>, Alvonzo <netmaster@netset.net.au> wrote:
Salty wrote in message ...
ello again all
thanx for all the help last time IDing those ICs
now onto todays problem
does anyone know where i can get(besides buying a book) that has all the
pinouts and small amounts of info bout the full range of TTL and CMOS
chips,
it im askin too much on this one feel free to scream at me

go to www.natsemi.com the have most of the data sheet for TTL chip.

Actually, National shuffeled off their TTL to Fairchild Semi. a couple
of years back. Likewise Motorola split off On Semi. and did the same
thing with their logic stuff. On the other hand, Texas Instruments took
over the Harris logic stuff a year or so ago.

Good sites for TTL and CMOS would be Texas Instruments, Fairchild Semi.,
On Semi., Philips, and ST. Hitting the Chipdir web pages, which are
mirrored all over, including www.chipdir.com, gives you one of the better
manufacturer's lists, if you go down a bit in the main page and find that
link.

Mark Zenier mzenier@eskimo.com mzenier@netcom.com Washington State resident
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Mon, 28 Aug 2000 09:40:40 GMT, trash0@hotmail.com (Trash)
applied digits to the keyboard and routed the information from some
kind of brain (presumably), thusly:

On Sun, 27 Aug 2000 22:49:05 +1000, "beetung"
beetung@yoyo.cc.monash.edu......au> wrote:

Hi there,

I am after a transmitter for transmitting a modulated composite signal from
a CCD camera.

Currently, I am using a ARISTA AVS30 from Tandy which cost around AUS$80.
The reception I got from this is not as good as I hoped. Anyone aware of any
UHF/VHF transmitter in the market that has a range of around 20-30meters
with a reasonable price tag?


Dan


Well you could just use the RF output on CH3/4 with an two OM350 's.
Silicon chip had a project on it.. very simple to build.
Short of that, if your looking for some more grunt, I'm not sure if
those video senders have enough drive, but a BFR96 in class C will
give you up to 500mW. More than enough to get you 100m.

- Trash
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Wed, 30 Aug 2000 19:27:57 +0200, "Stephane Rosenthal"
<stephane.rosenthal@wanadoo.fr> applied digits to the keyboard and
routed the information from some kind of brain (presumably), thusly:

Hello,

The aim of this mail is to introduce the SEMIREF web site to you.

SemiRef is the first web site dedicated to electronic design aid.
It tends to be a reference site as regards to semiconductors.

Two main headings are already available :
- news regarding the semiconductor world,
- more than 450 links to IC manufacturers
(links are updated every 72 hours !),
- more than 160 IC manufacturer profiles.

- New ! - An "Announcements" heading allows you to follow the
Semiconductor News (Updated in Real-Time !).

You'll see new headings in the next few months, including tools
to help people search for components...

In the meantime, your suggestions or comments are welcome.
We wish you a pleasant navigation on SemiRef.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Mon, 13 Nov 2000 13:08:14 +1100, MC
<phmc@cc.newcastle.edu.au> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

I am after some of the past issues of TE dealing with Z80 micro related
projects .. if you have some let me know and how much you want for them
.. I think they were from #10 to about #15 (as far as I know) ..

MC
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Sun, 19 Nov 2000 15:16:56 +0800, Shane
<shanev@iinet.net.au> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

(G Cook)
wrote:

I want to copy my LPs to CD-ROM, my stereo doesn't even have a phono
input, but apparently you can use a pre-amp to connect the turntable
direct to the sound card with good results.

Does anyone know of a suitable pre-amp, available in Australia?

Does any one have advice on doing this, e.g. software to use to clean
up the sound?

I've got Adaptec Easy CD creator, this has WAV editing tools, are they
sufficient for cleaning up the noise from vinyl records?

Then again, is WAV the best intermediate format?

Grateful for good advice.

Hello,

I have had a little bit of experience in this. I copied my friends
sisters old 80's Records to CD after cleaning the crackle and pops out
of them.
Unfortunatly the only place that I can think of for a preamp for what
you want to do would be EPanorama. This has many circuits and ideas
for different areas: Audio, MID, computers, interfaces, IR etc...
heaps of stuff. Try at http://www.us-epanorama.net/

On your other question, a good proram that I used was called
DART PRO 32. This will remove cracks and filter the usual LP recoding
sounds from the input.
You can find this on the net at many shareware sites. Try TUCOWS first
or just type it into your favourite search engine.

Regarding your last question. I had my record player hooked into my
line-in on my soundcard and used SoundForge4.5 (can use other
recording software: Cool Edit etc...) Just need to capture a wave of
it. This will be about 10Meg/min... I record at 44kHz, 16bit, Stereo.
People ask why I'd use 44kHz for a record, but from my experience it
seems to be easier to filter when I have a hi recording resolution.
I then loaded this Wave into DART PRO 32 and filterted it until I
thought it sounded right. With this program you can set your filters
and sample a 10sec section to see if it has the effect you want,
before you go ahead and work the whole song.
I prefer just a plain ol' Windows PCM Wave file.

If you have any more questions on this area, please don't hesitate to
contact me. I will gladly help to the best of my ability.


Shane van Ingen
shanev@iinet.net.au
http://www.iinet.net.au/~shanev
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Mon, 20 Nov 2000 12:09:25 GMT, "Claude"
<davipoll@NOSPAM.bigpond.net.au> applied digits to the keyboard and
routed the information from some kind of brain (presumably), thusly:

Does any one have advice on doing this, e.g. software to use to clean
up the sound?

I used Adaptec's Spin Doctor for converting to wav and for normalising the
sound and EZCD Creator for burning. I tried a number of different programs
for removing scratches etc but none came close to Sonic Foundry's Sound
Forge with the special vinyl cleaning plug in. The results from this
progam were breathtaking. It's ridiculously expensive but provided you can
get hold of Sound Forge itself you can do what I did and use the demo
version of the plug-in (its free and lasts a week) over a very intense week
of cleaning. You could also get a friend to download the plug in on their
computer and e-mail it to you for an extra week.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Mon, 20 Nov 2000 21:00:44 GMT, franczabkar@ozeemail.com.au
(Franc Zabkar) applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

(G Cook) put
finger to keyboard and composed:

I want to copy my LPs to CD-ROM, my stereo doesn't even have a phono
input, but apparently you can use a pre-amp to connect the turntable
direct to the sound card with good results.

Does anyone know of a suitable pre-amp, available in Australia?

Does any one have advice on doing this, e.g. software to use to clean
up the sound?

LP to CDR conversion FAQ (Clive Backham):

http://homepages.nildram.co.uk/~abcomp/lp-cdr.htm


-- Franc Zabkar

Please remove one 'e' from my address when replying by email.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Thu, 04 Jan 2001 22:32:31 +1100, graybags
<graybags@optusnet.com.au> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

We don't handle military stuff but we are cheap!
The Bower Reuse & Repair Centre is a non-profit organisation created to stop
items going to landfill.
We handle all sorts of electrical stuff, mainly household items but occasional
special things come through.
If you want to have a look come to:
The Bower
142 Addison Road
Marrickville, NSW
Ph: (02) 95686280
I'm the main sparks tester there so email me if you have any questions.
Graham K

Ken Fox wrote:

Over in the US of A (land of the brave etc...) there are many electronics
"disposals" outlets selling typically end of run/obsolete/ex-defence force
etc parts. Everything from discrete components to populated PCB's and
missile launch consoles ;-). So where are they in Oz land. Anyone know of
any other than the overpriced pretenders such as Altronics etc. or do we
sell all of our disposals stuff to the US.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Thu, 25 Jan 2001 21:15:10 +1000, "Mitchell Scott"
<mitchell.scott@mail.com> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

Taken from Overclockers Australia newspage

Just in case you lose your mobile or it gets flogged. Did u know this? a
little 'get your own back' if you have your mobile stolen. May be of
interest to those Mobile Users among you.

To check your Mobile phone's serial number, key in the following digits on
your phone:

* # 0 6 #

A 15 digit code will appear on the screen. This number is unique to your
handset. Write it down and keep it somewhere safe.

Should your phone get stolen, you can phone your service provider and give
them this code. They will then be able to block your handset so even if the
thief changes the SIM card your phone will be totally useless.

You probably won't get your phone back, but at least you know that whoever
stole it can't use/sell it either. If everybody did this, there would be no
point in stealing mobile phones.



--
Mitchell Scott
mitchell.scott@mail.com

ICQ # 18881513
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Wed, 07 Feb 2001 01:16:24 GMT, "TeslaCoil"
<luckymyboy@hushmail.com> applied digits to the keyboard and routed
the information from some kind of brain (presumably), thusly:

Circuits Portal and the Circuits FTP site have moved. We are now at:

http://www.coolboard.com/myboards.cfm?oid=87403565161228

or

http://yi.org/circuits

Latest files:

Quickroute Electronic Design Studio v1.2b
ANSYS.V5.7-TFL
AGILENT.ADVANCED.DESIGN.SYSTEM.V1.5-TFL
HYPACK.Max.v00.5-SOMiSO
Virtual Disk 2000 (Transistor-Diode-IC Datasheets)
Elektor Magazine CDs Archive 1995 - 1998
PCAD.2000.Heritage-FiGRiP
Intusoft.ICAP.4Windows.v8.1.6-FiGRiP


Microsoft Whistler [build 2410]
FloorPlan 3D Design Suite 5.2
GESTEL SOLID THINKING V4.1A UPGRADE-XFORCE
GESTEL SOLID THINKING V4.1A -XFORCE
Merco PCB Elegance v2.0
Circuit Shop v1.10
AGILENT.HFSS.V5.6-TFL
FEMLAB.V2.0-TFL
MATHSOFT.MATHCAD.V2001.PROFESSIONAL-TFL
LinuxCAD.2000.23.For.All.Linuxes-CADMiUM
Virtual.Gibbs.5.5-SOMiSO
Cadence.Allegro.v13.6_ISO-RBS

"TeslaCoil" <luckymyboy@hushmail.com> wrote in message news:...
http://yi.org/circuits

AC Circuits Challenge v4.00
Accel Tech P-CAD 2000
ActiVPlace 4.3
Advanced Design System 1.3 [HPADS]
Advanced Design System 1.3 [HPADS]
AGILENT.HFSS.V5.6-TFL
Agilent-HP HFSS V5.6
AIM Spice
Aldec Active HDL v4.1.767cy
ALDEC.ACTIVE.HDL.V4.2.873-RiSE
AlteraMaxplusII
Analyser 2000 v4.10
Analyzer2000 v4.01
ARRL Radio Designer
ARRL Radio Designer
Atmel IDS6.00 FPGA ISO
AutoELECTRIC v2000.1
B2 Spice A_D 2000
Basic Circuits Challenge v4.00
CAD Design Impedance Calculator v1.0
Cadence Allegro 13.6
Cadence.Allegro.v13.6_ISO-RBS
Cadmigos Spice-It v1.8
CadSoft Eagle v4.0 for Linux
CadSoft Eagle v4.0 for Win9xNT2k
Cadstar 4.0
Cadstar Patch version4.0
Cam 350
CamCad Pro v3
Camtastic Protel Version
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"TeslaCoil" <luckymyboy@hushmail.com> wrote in message news:...
AGILENT.HFSS.V5.6-TFL
Cadence.Allegro.v13.6_ISO-RBS
FEMLAB.V2.0-TFL
LinuxCAD.2000.23.For.All.Linuxes-CADMiUM
MATHSOFT.MATHCAD.V2001.PROFESSIONAL-TFL
Virtual.Gibbs.5.5-SOMiSO


"TeslaCoil" <luckymyboy@hushmail.com> wrote in message news:...
Everything!

http://yi.org/circuits
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Sun, 18 Feb 2001 14:06:53 -0000, "Alex Pinkerton"
<alpink@globalnet.co.uk> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

Not possible.

Cockroft-Walton multipliers depend on the efficiency and leakage
characteristics of both the diodes and the capacitors. With each successive
stage the overall efficiency of the circuit falls and so more and more power
has to be put into the front end.

For a typical circuit constructed using commercially available components
and a 1000v ac source the output voltage at each stage would be in the order
of 1900v, 3800v, 5600v, 7200v, 8400v etc (as opposed to 2000v, 4000v, 6000v,
8000v, 10000v)

Reaching 75KV would mean you starting with an input voltage in the order of
10KV. Finding diodes capable of withstanding those types of voltages would
not be an easy task.

Also maintaining 75KV at DC would be near to impossible. Voltages at this
level tend to act like high pressure gasses and 'leak' like crazy.
Containing them in any sort of a portable unit would be near to impossible.
Having been on the receiving end of a 40KV shock through almost 5mm of glass
I can tell you how hard it is to contain them.

As for stun guns and the like, they work on a completely different
principle - one based on transient discharge multiplication (i.e. 75KV for
about a microsecond).

Regards

Alex




"Roger Dewhurst" <dewhurst@wave.co.nz> wrote in message
news:96hhbn$1d9$1@news.wave.co.nz...
Is it possible to construct a voltage multiplier, perhaps along the lines
of
a Cockroft-Walton voltage multiplier, that can be driven from a low
voltage
DC source and provide a low current output of around 75K volts or more? I
would be most grateful for any suggestions or pointers.

--
Roger Dewhurst,
ROTORUA, N.Z.

When you are confronting an intruder at dead of night, be
comforted at the thought that while there may be no police
within miles, nearby there's sure to be a top team of
social workers who will be able to help the poor victim
of society load your things into his van, while telling you
how fear of crime rather than crime itself is the problem.
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Sat, 14 Apr 2001 02:06:30 +1000, Tom L
<tom.lut@bigpond.spam> applied digits to the keyboard and routed the
information from some kind of brain (presumably), thusly:

I bought a heap of 500pF 20kV caps a while a go from Oatley, I dont
know if they have them anymore but they worked fine in my 800w Tesla
coil (16"+ sparks).
At least they did until some twit threw a beer can into the inverted
cone of the primary at a party. It shorted the primary to the
secondary and burnt out about an inch of windings. The NST is ok (my
jacobs ladder still works) so I suppose I should get around to
rewinding the secondary sometime.

There is quite a bit of info on making HV caps from multiple MKT types
on the web, try sorting through the info available in the Tesla Coil
web ring http://nav.webring.yahoo.com/hub?ring=teslaring&list&page=1.

Also the Tesla Coil mailing list has an enormous amount of info, its
at http://www.pupman.com/


On Fri, 13 Apr 2001 05:27:52 GMT, jcrighton@sia.net.au (John Crighton)
wrote:



Check alt.energy.high-voltage news group and
http://www.oatleyelectronics.com/ they have a few hv caps.

Hello Tom and the group,
thanks for your reply, and suggestions. I will ring up oatley
and find out if they have polypropylene types rather than
the ceramics. I have been told the ceramics are not as
good as the polyproylene caps for tesla coils. Something
to do with the delta Volts/delta time rating.
If I have to make a capacitor out of many then these are
the ones to buy.
The O.OO2mfd 12.5KV capacitor that I saw in a professional
High Freq arc starter was a mica type and about the size of
two cigarette packets put together.

Do you or anyone know of any scrapyards or disposal shops
with electrical/electronic junk in the Sydney area. There
used to be a shop called Ace Radio, but I think it has
gone now. Someone on this group mentioned a place
near Bankstown but I have forgotten the name.
Regards,
John Crighton


Antispam email address: please remove [.antispam] to reply
http://www.users.bigpond.com/tom.lut/
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Mon, 23 Apr 2001 12:04:49 +1000, Heath Young
<heath.young@studentmail.newcastle.edu.au> applied digits to the
keyboard and routed the information from some kind of brain
(presumably), thusly:

Hey all....
Little off the topic I suppose, but anyways, no doubt any
of you who have tried to get hold of laser based stuff - HeNe tubes,
argon ion, High power diode, DPSS, YAG etc have discovered that it is
really difficult to get hold of these sort of things in Australia...
Oatley Electronics USED to sell interesting stuff but they no longer
sell even HeNe tubes :(

I can order from the US but with the exchange rate this becomes painful
:(

I am after any gear used / scrap / otherwise that contains lasers in the
visible spectrum - Diode lasers need not apply - unless high powered...
or DPSS :)

I have things to swap like 15KV 30mA neon sign transformers (and 5KV,
3KV 10KV etc.) or other laser based stuff like high powered visible
laser diodes - 35mW @ 660nm.. even a YAG rod - worth $600 USD!

If you are junking it I will pay postage :)

Contact me on the newsgroup or via email...

Small quantities only - I am a hobbyist not a reseller!
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 
On Stardate Wed, 30 May 2001 14:02:52 GMT, "voltare"
<voltare2@optushome.spamless.com.au> applied digits to the keyboard
and routed the information from some kind of brain (presumably),
thusly:

JVC have a new vcr that is true multi standard, that is, will convert any tv
system to any tv system (pal to ntsc to what ever ect.)
Foley U. Matthews. there | I believe in : Paying NO voluntary taxes, i.e.
are no e's in my true email | Lotteries, Gambling... The Executive Producer
Visit the Ellen Foley Info | is to blame!... and perhaps, Love (is/can be)
http://www.go.to/ellen-foley | "Fully expecting to be Hurt!"
 

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