A
Anonymous
Guest
As to receive winding being exactly matched to transmit frequency, you can have the receive windings slightly out of synch. The target, depending on its composition will change the returned signal. For those who remember A.H. Electronics "Super Pro" detector, the loop was a printed spiral wound design transmit loop, with no receive winding. The detector was tuned to a low hum, and when a target entered the field it changed the coil frequency and alerts the operator.
There have also been some questions about Sovereign/Excalibur loops. Early models had a searchcoil which contained a circuit board that was part of the transmitter and preamp; later coils only have the preamp.
There have also been some questions about Sovereign/Excalibur loops. Early models had a searchcoil which contained a circuit board that was part of the transmitter and preamp; later coils only have the preamp.