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 #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Patrick wrote ...
Proud Mary wrote ...
Patrick wrote ...
ill try the original primary, but its hard to figure out, there are 8 different pin combinations which reveal 0.3 to 0.6 ohms, and Killa-X and i have no way of knowing the number type.
Are there no numbers on the LOPTs that we could cross-reference in the HR Diemen catalogue?
From PM, Killa-X :
"I wont know anymore about them than you would, seeing i bought them on ebay as a "Factory Outlet" meaning, my spend on 24, all 24 could have been dead. they are all rejects for whatever reason. At least, thats what the seller claims. All 24 do work. I only had 3 that came shipped with 100% smashed cores.
I have tried searching the info on them with whats listed and found nothing sadly. Says TCE 70234 Feb 205 2:01
then theres a ba code. My phone says its:
70234509789660 which brings nothing on google."
My label says :
2G25023 A1A TCE 35.0 Kv RXE
I'll have a look for you later, but right now I have to make some Wiener schnitzels.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Patrick wrote ...
EDIT: what does the text block at the bottom mean?
It refers to readings on the HR Diemen Simulator STVDST-01 test set for 15 kHz diode split transformers (DST)
MAT is certainly the ouput voltage in kV, but I'm not confident about the other values - "+" may be the output current in mA, which would make this into an LOPT of prodigious size.
I have to do the dishes now, but will look in again later.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Proud Mary wrote ...
I have to do the dishes now, but will look in again later.
How were the dogs?
After doing some math i believe im putting in 300W (AC input), and getting 181W out (at the arc) which is 60% eff. I think thats credible, im sure if i reduce the magnitizing current by using the internal primary i could up the efficiency and output power with no increase in input power.
Ill need to verify all this with an HV resistive divider which im building now.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Dönberg are listing HR 6329 as the HR equivalent of 2G25023, though I see HR Diemen itself has dropped it from their product list - only to be expected as CRTs fade from the TV and monitor retail sector.
I've never seen an LOPT with these specs, and it's unusual that there is no focus output after the first diode up from Earth.
Someone else has stuck on that 35 kV sticker - I've seen plenty of HR LOPTs and the voltage is never stated on the outside - BUT - it is possible that it may have been done to meet some national (US?) safety certification scheme. Anyway, it's a lower figure than the datasheet MAT.
Look at the voltage on the primary auto tap - 850 Vpp. Never seen the likes of it, Patrick, but I'm sure that some of our resident flyback enthusiasts (not me!) will be able to tell you all about it.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Proud Mary wrote ...
Dönberg are listing HR 6329 as the HR equivalent of 2G25023, though I see HR Diemen itself has dropped it from their product list - only to be expected as CRTs fade from the TV and monitor retail sector.
I've never seen an LOPT with these specs, and it's unusual that there is no focus output after the first diode up from Earth.
Someone else has stuck on that 35 kV sticker - I've seen plenty of HR LOPTs and the voltage is never stated on the outside - BUT - it is possible that it may have been done to meet some national (US?) safety certification scheme. Anyway, it's a lower figure than the datasheet MAT.
Look at the voltage on the primary auto tap - 850 Vpp. Never seen the likes of it, Patrick, but I'm sure that some of our resident flyback enthusiasts (not me!) will be able to tell you all about it.
Yep, ok ill wait for the oppinions to come pouring in... What do you think of me using the pins 6 and 8 as my 65 V primary?
On a seperate note, ill be using my Russian HV resistors for the divider, two 25 kv ones, so 46Kv at 70W, into reistors meant for 4 watts total, i hope this is ok for 1 to 3 seconds at a time? ill have them in oil of course.
PS. its the biggest Flyback ive seen in quite a while, about 11 years ago i ran into one almost as big from the largest CRT TV my family ever bought. So it must be a real piggie, its the size of a potato!
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Hopefully you get things figured with the pins. I have always ran them from the core, never the internal windings. But good luck! I have a flyback from a rear projection screen that is 2X the size of these, with a voltage multiplier. However, it has horrible arcs because the pins are too close and flash over.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Patrick wrote ...
On a seperate note, ill be using my Russian HV resistors for the divider, two 25 kv ones, so 46Kv at 70W, into reistors meant for 4 watts total, i hope this is ok for 1 to 3 seconds at a time? ill have them in oil of course.
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.
HV Flyback Bench Top Power Supply for Lab.
