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 #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
I have a flyback core and done tests with it, my first was simply old wire, and boxing tape. That didn't last too long. My 2nd test, was just coil and 4 layers of overhead sheets between each layer.
Here's my question.
can I just take wood varnish aka polyurathane and cover each layer with it? About how many layers of this varnish should be applied? is 4 overhead sheet-thick between each layer good enough to use?
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
If you can get some, teflon would work well. Make sure you keep space between the edge of the winding to the edge of the layer insulation to prevent arcing. Varnish probably wont work, unless you used lots of layers.
I have had it work well by using plumbing teflon tape, wrapping several layers, and putting paper ove that, for oil and a good winding surface.
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
insulate the layers in paper or something similar and after you wind it, submerge it in oil and the paper will suck it up preventing any internal air bubbles.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
teslacoolguy wrote ...
insulate the layers in paper or something similar and after you wind it, submerge it in oil and the paper will suck it up preventing any internal air bubbles.
Ah yes, i did forget about that. Apparently it is good for HF AC insulation. But the question is how thick of paper?
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
I do own Teflon plumbers tape.. Your saying that I would wind my coil first layer, Cover it with teflon tape, then put a few layers of overhead paper it on, and repeat? Either way I got to oil it.. was hoping a way to avoid that since all I own is vegi oil :(
Registered Member #1911
Joined: Mon Jan 05 2009, 06:30PM
Location: Salem, Oregon, USA
Posts: 165
I've been thinking of winding my own for a while, but I've decided that I'll get the power supply running reliably first. Anyways, my idea was to use polyurethane varnish in between each layer, letting it dry over each layer so it would hold itself together in the spiral (and helix) that would be the winding pattern. This would keep it from unraveling and, since it would dry before winding the next layer, it would be air-tight. Being air-tight is definitely a desirable trait in this case.... the polyurethane would, undoubtedly, soak into all the cracks. Another option is to heat up the container of polyurethane to the point that it starts gassing off immensely, and then submerge the wound core in it. This would saturate the windings (and not the core! ><), keeping them from being hurt by high-voltages. The main problem is that this would end up having a solid-ended flyback that can't have the secondary removed. If the operation doesn't work properly and your LOPT fries, bye-bye core...unless you want to dissolve the poly...
Just my fifteen cents. I need the other eighty-five to buy myself a new core...
Registered Member #93
Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
I've heard of people saturating kraft (or some other porous) paper in polyurethane varnish and wrapping each successive layer of the coil in strips of the paper. That way you get inter-layer insulation plus a minimum guaranteed separation distance between layers.
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.
Planning on winding own flybacks
