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 #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all. As part of a "clearout" I found my (presumably faulty ex-equipment) HV resin encapsulated Zappy McPerp (tm) transformers found online. I had previously cut both prods off each for legal reasons upon receipt and soldering HV/Gnd wires, since found that they were probably defective which is why they had been removed as the primary leads had clearly been soldered before and one showed evidence of internal damage which got disposed of AFAIK, unit *2 only had a broken primary wire which I've patched up with 24 core.
Is it likely that its really no good? I had a cunning plan to use my SDR downtuned to the low MHz range to make an HV supply for X-ray generation using piezo transformers and a 5642, but this might be somewhat simpler as it is just impulse driven. (EDIT: Probably shouldn't be discussing this on here maybe move to "Ionizing" ?)
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
The 'stun gun' type transformers are only capable of brief transformer action before saturation, but that is enough for the intended application, I doubt that they would be useful for continuous modes of opertion, such as cw ac.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi, upon consultation with relevant authorities they expressed some concern. I would have to get legal advice on whether the wound component in question is actually legal to own in the UK as it could *possibly* be considered a "weapons component". As I've permanently modified it from its original configuration it would probably be considered the same as owning a conventional gas BBQ igniter, which *was* legal up until a while back but someone else over here got in trouble.
Registered Member #11591
Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
Conundrum wrote ...
... As I've permanently modified it from its original configuration it would probably be considered the same as owning a conventional gas BBQ igniter, which *was* legal up until a while back but someone else over here got in trouble.
How in hell can they classify a BBQ igniter as a weapon component? It's a component of a BBQ! I must be one of the most prolific weapons manufactures of the UK with my collection of LOPTs...
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Serious note, this one is almost certainly from a US police unit so probably quite dangerous in the wrong hands. For safety reasons its probably better to delete or lock this thread.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Irony: the transformer is actually out of a gas igniter. I found a reference to one online, and in fact coincidentally the missing part is the secondary ring capacitor which goes across the coil. The mini igniters found in Poundland gas lighters use a 3 pin custom IC and a epoxy potted coil/capacitor set to get about 9KV. (note: in this configuration don't exceed 8mm on the gap or bad things happen!) Also worth mentioning, it *needs* the Epoxy. My units still work but one needed a new secondary as it broke down in normal everyday use.
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.
HV transistor driver?
