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 #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Well I've never seen a comprehensive list on where to buy ferrite cores. So, let's make one!
Also, where would I find more ferrite cores like this one? Ones with a large winding window.
Also2, would it be a wise idea to wind a single pancake flyback on this core using 28awg magnet wire and electrical tape to seperate the layers? With the large winding window I could make quite a pancake. I'd like to use thinner wire, but aside from 40ga 28 is the thinnest I have...
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
You don't seem to have links in your post. TSC International is where I get all of my ferrites; they have pretty big cores at a ridiculously low price :) Now, where to get the giant ferrites I want for my solid-state pole pig using FD600R17's is a harder question...anyone know of a manufacturer who is willing to make HUGE one-of cores?
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Well according to 3M the scotch super 88 electrical tape is good to 10kV...
Edit: 10kV my ass, This stuff failed in 3 seconds at 1.5kV. Well that sucks, this tape would have made for a really nice looking FBT.
I have a theory: maybe the coloring in the tape, which I presume to be carbon black, is reducing its dielectric strength... Hmm, I'm going to get some white super88 stuff tomorrow and see how that holds up to the volts.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
I have purchased some cores from TSC international, there cheap. I put in a simple purchase order to see what kind of supplier they are. They do take pay-pal, and ship by UPS.
bwang wrote ...
question...anyone know of a manufacturer who is willing to make HUGE one-of cores?
Ive seen college professors and Phd's doing experimental work, find that its not worth the cost, time, or difficulty to find a maker of one-of-a-kind huge ferrites. What ive seen them do is to order the largest standard "U" core type and stack them. Or maybe the "I" picece and arrange as needed. Then using the lengths like legos to arrange the window and legs to the conventional dimentions. Finnally, epoxy with very flat faces to minimize any airgaps.
Is the resonant driving frequency effected more by material or size? I was looking at TSF core materials and was wondering what material would be the best for driving at approximately 100kHz.
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.
Ferrite
