ENAMELED CuNi44 0.1mm diameter (Constantan, Isotan) Resistance wire - diyAudio
Go Back   Home > Forums > Commercial Sector > Swap Meet

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th July 2011, 08:28 AM   #1
ryanj is offline ryanj  Australia
diyAudio Member
 
Join Date: Jul 2010
Location: Melbourne
Default ENAMELED CuNi44 0.1mm diameter (Constantan, Isotan) Resistance wire

Hi all,

Ive got an excessive amount of this wire so if anyone wants any let me know how much in grams, and ill give you a price plus shipping.

Ill even wind it on to a spool.


wire.jpg

Minimum Amount will be 100g, for $23 AUD.

CuNi44, also called Constantan, has a very low temperature coefficient, high electrical resistance, high ductility and non-corroding properties. It is suitable for use at temperatures up to 600C (1110F). Is a very malleable, very ductile alloy, it has a very good resistance to oxidation.
The alloy is non-magnetic. It is suitable for electrical resistors, potentiometers, heating wires, heating cables and mats.



John Brown from ecdesigns describes how to make virtually inductance and capacitance free resistors in his thread here:

Building the ultimate NOS DAC using TDA1541A

Last edited by ryanj; 30th July 2011 at 08:32 AM.
  Reply With Quote
Old 7th August 2011, 04:17 PM   #2
diyAudio Member
 
Join Date: Feb 2005
Location: Melbourne
ryanj,

What is the resistance per metre and who made it? Isabellenhutte?

... James
__________________
... jh
  Reply With Quote
Old 7th August 2011, 09:02 PM   #3
ryanj is offline ryanj  Australia
diyAudio Member
 
Join Date: Jul 2010
Location: Melbourne
Hi james,

Thanks for asking. The resistance is 65ohms per metre. Made by Wisdom Alloys.

Ryan
  Reply With Quote
Old 20th August 2011, 10:53 PM   #4
alazira is offline alazira  United States
diyAudio Member
 
alazira's Avatar
 
Join Date: Jun 2007
Location: Las Vegas
Blog Entries: 1
Hi Ryan,
What is the length per gram?
  Reply With Quote
Old 21st August 2011, 01:00 PM   #5
ryanj is offline ryanj  Australia
diyAudio Member
 
Join Date: Jul 2010
Location: Melbourne
Hi alazira

A rough calculation gives me 14.18 metres per gram.

So your getting about 92k ohms per spool.

Ryan

Last edited by ryanj; 21st August 2011 at 01:21 PM.
  Reply With Quote
Old 19th September 2011, 11:53 PM   #6
alazira is offline alazira  United States
diyAudio Member
 
alazira's Avatar
 
Join Date: Jun 2007
Location: Las Vegas
Blog Entries: 1
Hi Ryan,
Package received. Thanks for the bonus. BTW, do you have an estimate of what wattage this wire can handle?
  Reply With Quote
Old 20th September 2011, 11:18 AM   #7
ryanj is offline ryanj  Australia
diyAudio Member
 
Join Date: Jul 2010
Location: Melbourne
alazira,

Good to hear the wire arrived.

Not too sure about the power handling of this wire, i remember reading on john browns thread that it was "high wattage". I also remember that a member asked the same question that you asked me, and im pretty sure john provided a calculation in his reply, but i cant for the life of me find where it is, sorry.

Ill keep looking.

Ryan
  Reply With Quote
Old 20th September 2011, 11:22 AM   #8
ryanj is offline ryanj  Australia
diyAudio Member
 
Join Date: Jul 2010
Location: Melbourne
Here is something that might help you. Quoted from John Brown.

Quote:
Honeycomb / Mobius resistor wattage Hi ppap64.

Quote:
If you use 100 ohm/m Isotan to wind them, approx. what wattage
rating would they have?
I use these resistors for passive I/V conversion, dissipation here is approx. 4 milliwatts. Wire is not used for providing high wattage but for achieving low noise levels.

Given a 500R Mobius / Honeycomb resistor made of 100 ohm/m Isotan resistance wire, power rating equals approx. 2.6 watts. This is based on wire temperature of approx. 100 degrees centigrade and 72mA running through the wire.

So a 100R Mobius resistor of the same wire could handle P = I * I * R = 0.072 * 0.072 * 100 = 518 mW.

Wattage can be increased by increasing wire diameter.

Here are indication currents (approx. 100 degrees centigrade wire temp) for different Isotan wire diameters:

0.5mm, (2.5 Ohms / meter), 608 mA
0.25mm, (10 Ohms / meter), 368 mA
0.15mm (28 Ohms / meter), 128 mA
0.1mm, (63 Ohms / meter), 76 mA
0.08mm, (100 Ohms / meter), 72 mA

500 Ohm Honeycomb resistor made from 200 meters of 0.5mm diameter Isotan would have power rating of approx. 184 watts.
  Reply With Quote
Old 13th January 2012, 01:11 PM   #9
dady is offline dady  Balearic Islands
diyAudio Member
 
dady's Avatar
 
Join Date: Oct 2002
Location: Punta Prima, Menorca, Spain
Send a message via MSN to dady Send a message via Skype™ to dady
Hi Ryanj, What is the maximum temperature that support the enamel?
Do you have a seller of this wire?
I am interested in the construction of resistors made with constanta or nichrome. I not sure if i want to do in honey comb maybe making a coil in one sense and the other in the counter sense of the other for cancelate the magnetic field. I have in Argentina, some old resistors bobinated in no magnetic form that i took from old transmision devices from the airforce. Not here in Spain but the need with little inmagination is the mother of the invention.

Best Regards
Esteban
__________________
Esteban Bikic
  Reply With Quote
Old 13th January 2012, 01:16 PM   #10
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Current rating of the resistance wire will be determined by the surface temperature.
Resistance, surface area and environment will control that surface temperature.

Don't get confused by looking at power ratings.
__________________
regards Andrew T.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wire diameter in SMPS transformer - confusion Th3 uN1Qu3 Power Supplies 13 20th July 2010 08:07 PM
Filament winding wire diameter Klimon Tubes / Valves 6 29th March 2010 08:56 PM
AWG 34 enameled wire jkeny Parts 0 8th March 2007 03:24 PM
Wire Resistance / Ohms per foot Info John Biles Everything Else 0 11th August 2005 02:03 PM
resistance wire much better than 0.5ohm Caddocks ? mikelm Everything Else 15 7th November 2004 06:20 AM


New To Site? Need Help?

All times are GMT. The time now is 10:42 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2