I read in sci.electronics.design that Lester Crane <
[email protected]>
wrote (in said:
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?
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.
