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.
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 600°C (1110°F). 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 - Page 327 - diyAudio
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.
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 600°C (1110°F). 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 - Page 327 - diyAudio
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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
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
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
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
Hi AndrewT, When i refer to enamel is because the choice in make a coil with many layers one over the previous. The fussion point of Constanta is so High. But if i put together the layers and rise the temperature is possible to short circuit and became down the value.
Best Regards and many thanks for you at the Scotish Borders of the world.
Best Regards and many thanks for you at the Scotish Borders of the world.
Dady,
I dont know the answer to this question, but i will try and contact my supplier to find out for you.
Please note that the benefits of using this wire are taken away when you push wattage rating.
Sorry sir, the question about the Tº of the enamel is pertinent because if you make the coil in multiple layers or putt together the wires and rise the Tº (the dissipation is enough) is possible to short circuit between them. Then you put the finger in the middle of your favourite part of you body and feel if is hot.
Esteban,
Suggest you look up the spec sheets of the Isotan wire from either the "Lake Shore" or "Isabellenhutte" websites that will be same/similar to ryans wire from China.
Basically, the wires temp range is about 60*C without significant value change or permanent material alteration - insulation temp rating is also available, if memory correct but to go to this sort of effort for a precision resistor, highly recommend NOT to use a "choke wind" of the resistance wire, for obvious reasons, even if you use a "mobius" system
- there are plenty of other winding/stacking methods to avoid a self heating transformer style
What is the resistor value/voltage/wattage and it's use?
Suggest you look up the spec sheets of the Isotan wire from either the "Lake Shore" or "Isabellenhutte" websites that will be same/similar to ryans wire from China.
Basically, the wires temp range is about 60*C without significant value change or permanent material alteration - insulation temp rating is also available, if memory correct but to go to this sort of effort for a precision resistor, highly recommend NOT to use a "choke wind" of the resistance wire, for obvious reasons, even if you use a "mobius" system
- there are plenty of other winding/stacking methods to avoid a self heating transformer style
What is the resistor value/voltage/wattage and it's use?
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