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 #1824
Joined: Wed Nov 26 2008, 02:57PM
Location:
Posts: 7
hi im new at electronic i wanna do one of plasma speakers i had ftb672 for philips and ive all things i made everything but i dont know which pins of ftb is using 12 to 40 volt pls some one help me...
Registered Member #1526
Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
Hello, I am using this design and I have a question if anyone has time to answer :o) Should the mosfets` gates both be driven from the same `end` of the gdt as in the diagram or should they be driven from opposite ends? It seems like they`ll both switch on at once if connected as shown. Thanks in advance.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Fraggle wrote ...
Hello, I am using this design and I have a question if anyone has time to answer :o) Should the mosfets` gates both be driven from the same `end` of the gdt as in the diagram or should they be driven from opposite ends? It seems like they`ll both switch on at once if connected as shown. Thanks in advance.
Sorry I forgot phasing of the GDT. I'll fix it and re-upload the schematic. However anyone who has at least a bit of experience with electronics cold have figured it out
Registered Member #1526
Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
I was pretty sure but I wanted to be 100% as I have one pair of transistors and it`s going to be a Christmas present! Hopefully I`ll get the rest finished in time - thanks for the help.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Fraggle wrote ...
I was pretty sure but I wanted to be 100% as I have one pair of transistors and it`s going to be a Christmas present! Hopefully I`ll get the rest finished in time - thanks for the help.
Will
If you have just ONE pair I should suggest you to be careful . This circuit likes to explode for various reasons and I'm aware it is not the best one, but its complexity to sound quality ratio is excellent IMO On first runs use a lightbulb in series with mains input (only for the power part. NOT for gate driver) and turn gate driver on before you turn on main power. Also make sure you don't overload the input because if it goes too high, frequency falls to zero which can destroy the bridge. Finally, the 3525 chip is not the perfect gate driver, for this reason I use additional gate drivers on its outputs. They are not needed but make for cleaner signal and sometimes cooler FETs.
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.
Flyback Transformer Problem help me pls
. This circuit likes to explode for various reasons and I'm aware it is not the best one, but its complexity to sound quality ratio is excellent IMO