A minor clarification:
At 60mhz, skin depth is 8.4um.
At 60hz, skin depth is 8.4mm.
So according to that calculator, skin depth is inversely proportional to the square of the frequency.
Exactly.
Jerry, KE7ER
On Mon, Jul 12, 2021 at 12:16 AM, Gordon Gibby wrote:
Skin effect is curious, here's a calculator.??
For copper, it shows that the skin effect at 10mhz is 20 micrometers, so at that depth the current density
is only 37% of what it is at the surface of the copper. It decreases exponentially as you go deeper.
What I find curious is that at 60 Hz, the skin depth is 8.4mm. That's 6 orders of magnitude lower
in frequency, but only 3 orders of magnitude larger skin depth
