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 #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Killa-X wrote ...
Not fully proud of my 25KV fullwave 1A rectifier, because its large, since i stuffed my series diode inside 1/2" PVC pipe, 10" long, and painted it to LOOK like diodes. I put 25 1N4007's in series as close as possible. Then I put hotglue below and above, so the diodes where incased in hotglue, which then was shoved in PVC pipe for looks. Works great.
Now obviously this take up more room because its a long strand, but it would work good for a large CW or something i guess, making PVC shape diodes. Plus you could oil fill them too.
I think I read some discussion about not bothering with resistive voltage sharing since modern diodes somehow make this less necessary than it once was. Moreover, I think the capacitive transient sharing design portion is more pertinent when dealing with frequencies above the 1kHz range.
I designed and built my first 35kV, 350mA, full-wave bridge rectifier using these calculations, although I'm not equipped to tell whether my design is any better than without the resistive voltage sharing elements. I put together a handy Excel spreadsheet that helped me design various line-frequency rectifier stacks, if anyone's interested. Funny thing was that I eventually went with 4 of those Chinese 40kV, 1A brick rectifiers...
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
Hi Patrick I don't know if this will help but when I built my tripplers they came out looking like this. I wanted every thing to be as compact as pausible. if I wanted to have I could have sealed them in pvc and filled them with oil or perifin wax.
Registered Member #509
Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329
Patrick wrote ...
I stilll havent found a good source for iso propanol... any suggestions?
MG Chemicals 824-1G if youre feeling fancy and want anhydrous (they also have a 1L size available too)
Otherwise just go to the drug store and pick up 90% rubbing alcohol (make sure its unscented etc... ) and if youre concerned about moisture, bake the board afterwards, preferably immediately before covering in your encapsulation compound of choice, if youre going to be using any.
EDIT: totally missed that there is was a 3rd page -.-
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.
Putting many diodes in series for a HV diode.
double post... I think I need either more or less coffee this morning.. *steps away from keyboard*