Convert watts to Teslas?

None, inductance is lossless.

You might have luck with VAr or volts however...

Tim

-- Deep Fryer: a very philosophical monk. Website:

I realize this depends somewhat on emitter coil efficiency ... but given an air core solenoid and sinusoidal audio frequency signal, is there anyway to approximate how many microTeslas I will get per mW?

Much thanks,

Lester

NO! Measure it; the magnetic field will vary with the signal / drive.

And ampere-turns..

I read in sci.electronics.design that Lester Crane wrote (in ) about 'Convert watts to Teslas?', on Wed, 28 Sep 2005:

No, because the field strength varies wildly with where you measure it.

In any case, you don't need ANY watts to produce the field (except for a very short time during which the field is set up). Power dissipated in the coil is just I^2R, and you can get the same field from any value of R from zero (superconducting coil) to large (thin wire, many volts required to produce the required current).

If you say what you are actually trying to do, I may well be able to help. This is an area in which I do a lot of work.