Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 17
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
All today's birthdays', congrats!
Adam Munich (30)
Alfredo Texacca (60)


Next birthdays
05/04 Matthew T. (35)
05/04 Amrit Deshmukh (60)
05/05 Alexandre (32)
Contact
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.
Forums
4hv.org :: Forums :: Tesla Coils
« Previous topic | Next topic »   

4 MOT Tesla Coil

Move Thread LAN_403
ritaismyconscience
Mon Nov 26 2018, 07:21AM Print
ritaismyconscience Registered Member #62937 Joined: Wed Jun 06 2018, 08:20PM
Location:
Posts: 32
This is for our first big coil, which is going to be a rotary spark gap coil.

We are using 4 MOTs with doubler for our power supply:

Powersupply1


The blue filter capacitors are 40uf 1100v; diodes are chains of 1N5408.

Testing the power supply (video): *

More on this project to come as stuff gets built.

Back to top
ritaismyconscience
Mon Nov 26 2018, 07:26AM
ritaismyconscience Registered Member #62937 Joined: Wed Jun 06 2018, 08:20PM
Location:
Posts: 32
Image seems to not be displaying, here is link: Link2
Back to top
nabzim
Mon Nov 26 2018, 10:36AM
nabzim Registered Member #60732 Joined: Sun Aug 28 2016, 06:07PM
Location: Villa Park, California
Posts: 8
What design are you basing it off of? I don't think i've yet seen 4 MOTs with diodes before. is it a voltage doubler? (you would get like 23000 vdc or more in that case) or half or full wave rectifier? (you would get like 11300 vdc or more in that case) as opposed to a 2 MOT voltage doubler where you get the same 11300 vdc, or more, since these calculations are based on the MOT being 2000 volts, but it's usually higher than that. And from the sound in the video, you might want to move your spark gap electrodes closer together. too much bang energy can put unnecessary stress on the whole system, especially tank caps.
How big is your coil going to be? I wanna see that beast!
Back to top
Chris Cristini
Mon Nov 26 2018, 01:35PM
Chris Cristini Registered Member #1749 Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497
Those caps are awesome!!!
Back to top
ritaismyconscience
Mon Nov 26 2018, 09:44PM
ritaismyconscience Registered Member #62937 Joined: Wed Jun 06 2018, 08:20PM
Location:
Posts: 32
We're using a voltage doubler.


For Chris: the capacitors were bought off taobao. If you have a way of getting them brought here, you can buy a lot of really affordable components in large quantities

The blue capacitors are for filtering (they are probably not rated for the current and their capacitance is probably too big). We are using some 1200V 0.3uF capacitors for our MMC. There will be a giant inductor between the two capacitors to make sure that we are not shorting the power supply capacitors (probably made from 3 MOT secondaries).
Back to top
paulj
Mon Feb 04 2019, 08:02AM
paulj Registered Member #59353 Joined: Sun Apr 17 2016, 02:08PM
Location: France
Posts: 84
Hello,
the design is a bit messy, but promising,

look at this link, I built my tesla coil with 4 MOT.

Link2

Think about safety, the MOTs are not limited in current, so very dangerous as the distribution transformer (pole pig);-)
Back to top

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
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.