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.
Registered Member #7267
Joined: Tue Oct 16 2012, 12:16AM
Location: Detroit, Michigan
Posts: 407
Wow! Just wow!
It's weird the FBI practically helped them build it, waited till it was done, then arrested them. Whereas they probably could have prevented the whole thing early on by not giving them funding and helping them find the components. I'm sure the two guys could and would have found another way, but why instigate them? Probably ensuring the arrest or wanting the xray for themselves (just kidding)
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
(cue Ebay pulling anything remotely HV related or vacuum tubey)...
This sucks, whats the worst that could happen? So what, they give themselves radiation burns but its not like they could have made it portable. Someone needs to point out that there are a lot of amateur fusors, etc operating with perfectly good shielding etc and people with more IQ than a dozen FBI agents put together who would put a PhD to shame.
You thought the "War on Drugs" was bad, now its the "War on Mind". Its positively Orwellian.
Registered Member #53
Joined: Thu Feb 09 2006, 04:31AM
Location: Ontario, Canada
Posts: 638
To be fair, between google and ebay almost any moron with a pair of brain cells to rub together could build some x-ray equipment just dangerous enough to hurt themselves and people around them. I can see this kind of situation happening with more and more niche hobbies.
3D printers and printed guns being a perfect example, 3d printed guns are not a threat to the public at all BUT there is a very real danger of people who are ignorant of the hazards involved hurting or killing themselves with their own printed guns.
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Conundrum wrote ...
(cue Ebay pulling anything remotely HV related or vacuum tubey)...
This sucks, whats the worst that could happen? So what, they give themselves radiation burns but its not like they could have made it portable.
Define "portable" "the plan was to buy an industrial X-ray system and install it in a truck. " but yes, it will be used by some as a "reason" to ban anything remotely interesting.
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
The idea to do this has actually been around for a long time, and has apparently been "rediscovered" many times by various people. IIRC there was even an episode of "Quincy" (back in the late 70s or early 80s) where someone did this.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
A few years back there was a controversy about antique TVs that people still used and if they should be modified to include radiation failsafes that cut the HV in the event of a runaway or open tube heater failure.
The circuitry to do this would be very simple, just a mains relay inline with the 240V and an end window detector based on a scintillator+CdS resistor to keep the lawyerbots happy.
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.