Bob38
Active member
Hey Folks
Dumb question #50
One of the common declarations of the HF coils is that they separate targets better in iron. This is commonly known, but why? Is it because the smaller and more rapid wavelength creates a "high definition effect" that has the ability to divide the high concentrations of different conductors? Or is the separation due to amplification lower conducting metals which leave the iron targets way behind in the audio response? or both?
And last, at what point (Khz range) do you find this to be most effective?
I have a few locations where the concentration of iron is so heavy that I could literally have three targets under the coil at the same time. On several occasions, I have dug a few nails and then a nickel or closely located next to a large piece of iron. All shallow, of course, less than 4 inches deep.
I would like to hear from others and their opinion of how they think the physics of this separation happens.
Dumb question #50
One of the common declarations of the HF coils is that they separate targets better in iron. This is commonly known, but why? Is it because the smaller and more rapid wavelength creates a "high definition effect" that has the ability to divide the high concentrations of different conductors? Or is the separation due to amplification lower conducting metals which leave the iron targets way behind in the audio response? or both?
And last, at what point (Khz range) do you find this to be most effective?
I have a few locations where the concentration of iron is so heavy that I could literally have three targets under the coil at the same time. On several occasions, I have dug a few nails and then a nickel or closely located next to a large piece of iron. All shallow, of course, less than 4 inches deep.
I would like to hear from others and their opinion of how they think the physics of this separation happens.