If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
just a breif mention. most of us do not have high rez monitors or wide screen. i beg you to keep that in mind. ...
Are you sure about that? My site meter indicates that only 10.74% of visitors are using 800x600 or less screen res some of which are mobile phones/PDA's. The greatest proportion use 1024 x 768 including me. If you are using Windows internet explorer (as I do) your pics will size down to fit allowing you to expand at will. Most of my pics are 1000 pixels but I have kept full size for some of 3000x2000. All are thumbnailed, so view how you want.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Yea, I agree, not many people use less than 1024x768 nowadays. In my day job, I try and make sure the GUIs for my programs fit on 800x600, but if they don't, it's not the end of the world.
I do like sites to have small images that can be clicked to reveal the full size version. For two reasons: The page loads faster, and it lets you browse the site in a small window along with other stuff on your desktop. For that same reason I prefer "Liquid" layout, like 4hv has, where the page width reorganizes itself to fit your screen.
Registered Member #14
Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
In the fluorescein picture section there is a great demonstration of the fluorescence auto-adsorbtion fenomena. Since the electronic levels fit perfecly the radiation, the flurescence is adsorbed from the fluorescein itself. Hence higher concentration doesn't mean more quantic efficiency. Probably there is a concentration at will the efficiency is the best.
Registered Member #352
Joined: Tue Mar 28 2006, 08:39AM
Location: Greece
Posts: 14
Congratulations on success on your first try. It doesn't happen to most of us including me. What design did you use and source?
My TEA nitrogen laser page details my somewhat longer course.
Hello Peter Thanks for the positive comments. I'm looking at your site. Your projects are great but all these things needs a lot of money.
The power supply is a 10kV max @ 100uA adjustable from EMCO ( E101) . The circuit is a typical Blumlein topology I'm using 2 stacked laser transparencies (A4) and kitchen foil with 6.3nF total capacity with calculated energy ~320mJ @ 10KV Now i'm looking for doorknob capacitors to increase capacity and make the device more compact.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
TEA Nitrogen LASER
