Hi,

I am building a helmholtz coil.

Need the wire to be flexible enough for several hundred turns, in the order of 700. But also need it to stand up to the inevitable temperature increase... With 12 amps max input. (Probs up to 200 deg C)

So i am in need of some wire up to the job. With high temperature rating and sufficient CSA (without being too big such that it cannot be easily wound).

With a H.H. radius of 7cm, I will need ~1m for the coil + ~25cm slack for connections.


Does anyone have any suggestions??? As in which wire I can go for and which shop I can buy it from (UK)? Links would be great.

thanks

 

With such a high temperature, you will need to be very careful of the insulation type. Look for PTFE or better. Standard coatings will not survive.

 

Magnet wire is the type of wire you want. Here is a link to a chart to help pick a gauge of wire - http://www.farnell.com/datasheets/24248.pdf

 

Thanks very much for the replies. Much appreciated.

Furthermore, in the event that I wish to apply an oscillating current (up to MHz). What extra considerations should I take into consideration with the inevitable increase in impedance???

Thanks again