When two or more conductors are in proximity to each other, altenating current in one may induce a magnetic field which will impinge on the second conductor.

Now when current builds up in a restricted area along the surface of a conductor (such as a masked trace point for soldering,) AC resistance builds up at a rate which will approach the square root of said frequency. The loss built up from the resulting AC induction will send eddy currents throughout the conductor, which can cause damage to DC-based semiconductors, such as diodes, or computer processors, as the circulating current surges through the DC component and stresses it out, thus causing early failure.

And I don't give specifics because I don't give away my designs. It's that simple.

And I've built my own HAM Radio, thank you. Even cut and wound my own quartz oscillator.