RogerInHawaii
New member
What is it that determines the radius of the transmitter and receiver coils? Is it determined by the "radio" frequency that's used? Is it arbitrary, and any radius will do? Is the (smaller) radius of the receiver coil related or otherwise determined by the radius of the transmitter coil? Does the radius of the coils determine how sensitive the the unit is? Could I take an existing detector and build significantly larger or smaller coils for it?