I've discovered that multi-frequency VLF's AS WELL AS single frequency VLF's lack the capability to simultaneously balance out black sand and salt water. The alternative is a pulse induction detector.
The Motion Discrimination curcuit on some VLF's may screen out the signals from black sand and salt water, creating the false illlusion that they have been "balanced out". But silent, unheard signals from either of these sources CAN STILL INTERFERE with and may even obscure the target signals!
The Motion Discrimination curcuit on some VLF's may screen out the signals from black sand and salt water, creating the false illlusion that they have been "balanced out". But silent, unheard signals from either of these sources CAN STILL INTERFERE with and may even obscure the target signals!