High power variable resistor?

[eem2am]

Hello,

I need to make or get a 40W variable resistance , which is to be as non inductive as possible.

It will carry a current which is a constant 1.9Arms , 50kHz , sinusoidal current.

So the resistance has to be variable from zero Ohms to about 11 Ohms.

Ive found this but its too high resistance and looks rather too inductive
http://mf-powerresistor.com/rr_pw.htm?gclid=COyMx4vGoLgCFdMQtAodQgsAnw

Do you know who makes these things?

 

[CDRIVE]

If this has anything to do with your other two posts (with the same title) where you're looking for a digital pot, I can't imagine how a headset is going to suck up 40 Watts! It would turn your brain into a pile of goop!

Chris

Oops, that wasn't you! Sorry about that.

A high power wire wound pot isn't going to present much reactance to 50KHz. How much can you tolerate?

 

[eem2am]

i can tolerate maybe a few microhenries

 

[CDRIVE]

i can tolerate maybe a few microhenries

A 1" length of wire can have that much inductance.

Chris