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 #2424
Joined: Tue Oct 06 2009, 08:02AM
Location:
Posts: 17
Cheers Z28, I'll try raising the secondary.
Teravolt, Although the driver board and halfbridge are from the minibrute the resonator is considerably larger (I believe it's the design in the DRSSTCII book by the same author). Hopefully audio:deviant will come on and clarify things.
We've got most test equipment between us: 20meg scope, sigal gens, power suplies various multimeters.
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
hello Doug86, I did not relise that the 42l3332 caps were so expensive thease days at Allied if audio:deviant plans to add caps to his mmc the 942C20P15k are probibly saperior at 1/4 the price at
the only down side is you guys will have to buy 50 it looks like. maby others can find a good source of caps if that is the route you will be taking
Registered Member #2422
Joined: Tue Oct 06 2009, 02:41AM
Location:
Posts: 85
SteveC wrote ...
Don't forget that if you plan on having the coil make large sparks, then the resonant frequency of the primary circuit is going to have to be lower than the resonant frequency of the secondary resonator. Depending on spark size, your primary circuit Fo might have to be 20% lower.
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
Why is that?
As soon as the topload produces streamers, the conductive plasma increase the effective size, therefore capacitance, of the topload, reducing the secondary Fres. If you do what SteveC says, then that effect brings the resonant frequencies closer together and it works better.
Registered Member #2422
Joined: Tue Oct 06 2009, 02:41AM
Location:
Posts: 85
Dr. Slack wrote ...
Why is that?
As soon as the topload produces streamers, the conductive plasma increase the effective size, therefore capacitance, of the topload, reducing the secondary Fres. If you do what SteveC says, then that effect brings the resonant frequencies closer together and it works better.
Do programs like javatc factor that effect into their calculations?
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
No. If you were shooting a rifle, it would be called "aiming off for the breeze". TCs aren't all science, there's a bit of art and a bit of luck involved too.
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.
How close must primary & secondary resonances be?
