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.
Ok, I have a question for the science guru's out there. Tesla almost took down a building with a resonant frequancy he created. It was a mechanical oscillator, however here is where my question lies. Is it possible to do the same thing with electrical pulses? If somebody sent an electrical pulse at the matching Hz of a peice of steel for example, would the same "earthquake effect" be generated?
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
I may be wrong here, but i believe that the tesla machine worked on the mechanical resonance of the building, not the electromagnetic. The only way that electricity could do the same thing is that if it was pumped into the metal at such a huge current as to create heat and make the metal expand, and then some how cool it rapidly to contract it, and then do it all again. The resonance that you hear about with tesla coils is electromagnetic resonance. Which means that the growing and colapsing magnetic/electric fields oscillate at the resonance frequency of the conductor/coil that is determined by the inductance/resistance/capacitance. That's what i think. I haven't done the research to be sure, though. It would be really interesting if you were right and i'm sure it would spark a frenzy of experimenting.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
like Turkey was saying, the resonance used to do his fabled building experiment is not the same thing as electrical resonance. One has to do with the steel in a building acting like a spring with a weight on the end bouncing back and forth, the other has to with alternating electric/magnetic fields.
One could, if they wanted, use electricity to cause a piece of metal move and excite the resonance in a structure, either by using a strong electromagnet or even something like a spark discharge creating a pulse of pressure, but either of these methods would probably be quite inefficient and you would have been better off just turning a motor with a off-axis mounted weight spinning around.
Okay cool thanks guys, his invention was basically a little hammer that tapped the structure at a certain rate I beleive, just wondered if it was possible with a small current being passed through a conductor (metal)
Thanks, Ryan.
Actually! Say I were to have an electromagnet on a switch.. If I were able to turn that switch on and off at whatever Hz I was after, would that setup a frequency that could be useable?
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
That is what I was alluding to in my previous post, simply use an electromagnet to smack against the structure. The only problem with this idea is that it would have horrible efficiency.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Actually fixing the mechanism to the metal would be much more efficient instead of haveing it just smack into it. You can have a solenoid shift weight from side to side at the resonance and that would be closer to what tesla was doing.
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.
Resonant Frequency of Metal
