Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 100
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
All today's birthdays', congrats!
Download (31)
ScottH (37)


Next birthdays
11/03 Electroguy (94)
11/04 nitromarsjipan (2024)
11/04 mb (31)
Contact
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.
Forums
4hv.org :: Forums :: General Science and Electronics
« Previous topic | Next topic »   

whats the wattage for these resistors?

1 2 
Move Thread LAN_403
pauleddy
Sun Oct 10 2010, 08:28PM Print
pauleddy Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145
does any one know what the wattage for these resistors and know of any good uses for them.
the big one is 4ohms
and the smaller one is 10ohms
Junk2024

Back to top
IamSmooth
Sun Oct 10 2010, 08:55PM
IamSmooth Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I can only guess comparing it to some that I have on hand. The smaller one looks like it is close to 50w. The bigger one is over 100W. It might be 250W.
Back to top
Duality
Sun Oct 10 2010, 09:11PM
Duality Registered Member #1951 Joined: Sun Feb 01 2009, 01:59PM
Location:
Posts: 105
the bigger one looks a bit heat sinked? lol
Back to top
Shrad
Sun Oct 10 2010, 09:25PM
Shrad Registered Member #3215 Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780
the smaller one is 5 to 10 watts (I have a bunch of similar resistors each rated between 1 and 10 watts)

the bigger looks like it is either heatsinked or the resistive wire itself serves as heatsinking... looks like it is more than 100W definitely
Back to top
pauleddy
Sun Oct 10 2010, 09:27PM
pauleddy Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145
the big one is a resitive wire as stated was measured it a 4ohms
therf both from large dc power supplys, smaller on is from a 12v 50A supply and th big one is from a 30V-50V, 300A-600A supply i aslo got a 140000uf 50V cap from the large supply
Back to top
radiotech
Sun Oct 10 2010, 10:28PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
200 watts for the big one. Can do about 8 amps.... Nice load for a car amp. You find those in old wound rotor motor starters, especially on cranes.
Back to top
pauleddy
Sun Oct 10 2010, 11:40PM
pauleddy Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145
hmm.. well ther was about 4 of them and it was in a big yellow stell box that had a 250ac line in and meter for 50vdc and 500Adc
Back to top
teravolt
Mon Oct 11 2010, 02:09AM
teravolt Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
the big one is 225W and the little one should be 50W. The big one is less than a ohm
Back to top
pauleddy
Mon Oct 11 2010, 06:31AM
pauleddy Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145
hmm my ohm meter says that its closer to 4ohms
Back to top
radiotech
Mon Oct 11 2010, 06:11PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Dont run the big one so the element glows!
It is made by winding that sidewise strip
on a poreclean tube and then dipping
it in a ceramic glaze and baked.

The resistor will end up loose.

Did you get all 4 of them out of the
box and the ammeter too? How about
the mounting hardware?

I'd have snatched the whole box.
Back to top
1 2 

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
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.