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 #546
Joined: Fri Feb 23 2007, 11:43PM
Location: Albuquerque, NM
Posts: 239
So I went to pick up some caps today (198 uf/ 10KV) and while I was there the guy started asking me about some relays he had from the charging circuit for these...I was curious and took a look. i was expecting some kind of solenoid operated spark gap...but this one appears to be sealed in a glass tube with tungsten electrodes... He gave me a box w/ 4 of them. I've never seen this design before, and a cursory look through google and the forum didn't elicit any further information about them....
Anyone got a site with information about these? We were also wonder what they're worth. his guess was $50ish, my guess as a glass blower is $200-300, my EE father said something like $1000 if they were part of a government purchase...any of us close?
the guy said he's got like 30-40 of them, if anyone is interested.
Any info is greatly appreciated :) thanks in advance.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Yea definately Tungsten in that assembly. You can tell by the green glass which is Uranium glass, and the rose color in the glass-metal seal.
I've seen these a few times before but I don't know what kind of voltage level this one is good for. If I had to guess, I would say maybe 5Kv, but do some looking. Surplus Sales of Nebraska has some vacuum relays, so you might check that out. I think Jennings made HV relays too, but I can't remember the brands at the moment. This one is a SPDT, and there were other multiple contact switches out there too. I've seen some 4 contact vacuum relays at the swapmeet. As far as price, I would check Surplus Sales.
Registered Member #546
Joined: Fri Feb 23 2007, 11:43PM
Location: Albuquerque, NM
Posts: 239
Cool, mainly I needed the right search term for google :)
That helps a LOT
thanks
p.s. they are from a 10kv charging circuit. So anyways...surplussales has then in the $100-600 range. I'd guess these are in the lower end of that range.
if anyone else needs some lemme know, I can put you in contact with the seller.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Smaller second-hand Kilovac and Jennings vacuum relays often go on ebay for £20 (US $40) or so, so I would expect these to go for a bit more if buyers for such specialist parts could be found.
I don't know how many operations relays of this kind can endure before the vacuum starts to go "soft" - but sputtering of the contacts and out-gassing must limit their working life.
As you say, the new cost, especially when sold to a government department, could easily have been $1000 or more.
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.
high Voltage Relay
