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.
Hi Guys, I’ve done some slayer exciters, and learned some fundamentals such as how the self-tuning works. It’s on the more powerful end of those. Ie. can light a 4 ft commercial neon, but now looking to ramp it up to something that can throw some small streamers into the air.
Are the ZVS modules on eBay any good generally? I presume since they are driven at their own frequency, I’d still need a capacitor and spark gap to tune to the coils’ frequency? (at least if there was no feedback from the coil to trigger the LC circuit in the ZVS module). Cheers, Art.
Some are decent. I've successfully used the parallel LC type which uses two inductors. I prefer them greatly over the traditional single inductor center-tapped primary type.
Using ZVS for a tesla coil HV supply means you're going to have to essentially make a traditional SGTC out it, or make a secondary that resonates at the ZVS's natural drive frequency. If you make a secondary resonant at the ZVS's f0 then it essentially becomes a push-pull (single inductor) or parallel LC CW DRSSTC (dual inductor). Obviously the hard part of this is matching up all the resonances. Going the spark gap route you don't need a charging inductor or diode like the traditional DC resonant SGTC needs since a flyback's output is short-circuit tolerant, but you'll still need to follow normal guidelines for tesla tank circuit creation and tuning.
Note that most eBay drivers don't come with a transformer/flyback so their listed drive frequency won't be correct. The natural frequency of the ZVS driver is a result of the primary coil you wind on the connected transformer and the tank capacitance on the driver.
Registered Member #55219
Joined: Tue Jun 09 2015, 11:21PM
Location:
Posts: 80
I too have wanted to get a ZVS coil going, but it is not that easy to achieve breakout. Here is an easy circuit that performs rather well for how simple it is (forgot members name who came up with it). I often use it to test my mosfets too. The circuit likes more turns on the primary (10 - 20) wound close to secondary.. Depending on the Resistor divider you can give it up to 1/2 the mosfets voltage rating. I can pull a 2" arc from my 6" x 24" resonator at only 18v
Registered Member #55219
Joined: Tue Jun 09 2015, 11:21PM
Location:
Posts: 80
Should note that the Tank cap in the pic is an arbitrary number, and should be set for resonance.. If Oscillation fails (no cap) reverse primary leads.. I found that adding the tank cap can cause excess heating in the FET. What I did again, was to reverse the primary leads (where it was working w/o cap).
Hi again all :) When I was starting to think about a bigger one, I got myself a neon former, and at the same time a 4 ft neon. I’ve since fallen in love with the neon and want o keep them together :rolleyes:
I didn’t think much of a ZVS driver until I saw a similar thing driving some quirky ozone facial mask for supposed beauty treatment. Once gutted, the thing can be run, and some fun be had.
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.
Desktop Coil
