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 #139
Joined: Sat Feb 11 2006, 11:01AM
Location: Perth, Western Australia
Posts: 358
I'm currently in the process of making a bipolar coil(s) as a bit of a desktop display model for work. Everyone at work knows I love my coils, but no one has really seen one, so I would love to have something "Speccy" to show off. They are only going to be small, maybe 5 inches tall each and maybe an inch in diameter with c 400 turns each.
My questions are thus, What way would you guys run these for the most effective display with the biggest "cool" factor. I would love to add an audio mod to it, so PLL is looking like the way to go. but also there is something nice about small SGTC's. On the other hand, I know the 74HC14 circuit like the back of my hand and know it's pretty stable. (NOT saying the PLL isn't!) Also, do I need to run 2 x halfbridges? or 2 x driver boards? Or is that fact that the coils will be identical (I'll be counting the turns to ensure they are) mean that I can effectively run 2 primaries from the same bridge? Any suggestions would be appreciated. Jim
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I suppose you could run them both in series or parallel... But make sure that they are exactly the same or the one that isn't feeding the driver is going to be out of tune.
I would stay away from sgtc's just because they are so loud... The 60hz humm from a pll sstc is nothing compared to a sgtc... My little coil (about the same dimensions as you proposed) was extremely loud, not something I would fire up in the workplace...
I would go for the pll, because it is pretty damn efficient (well until you audiomod it, then it gets out of tune), so you don't need to lug around big huge heat sinks... Audomod would be cool XD
How about making a vttc out of those 811a's I sent you? The transformers would weigh a ton, but you would have a decently quiet/tame coil that is just about indestructible...
Registered Member #139
Joined: Sat Feb 11 2006, 11:01AM
Location: Perth, Western Australia
Posts: 358
Those 811A's are going to make my "The Don" VTTC. Kind of a tribute to the olden days and my grandfather ;) I like the idea of audio modded SSTC as a display coil, because it really adds a little something extra.
Registered Member #63
Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
This sounds nifty.
You can put the primaries in series, you realise... you don't necessarily have to build two separate bridges... BUT depending on the winding direction of each coil, and the winding direction of your primaries, the two coils' sparks will either hit each other or avoid each other =P
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.
Bipolar Desktop PLL
