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GPX 5000 Range 
GPX 4800 Range 
The Coil/Rx control changes the search pattern and sensitivity 
of the coil. This improves the versatility and characteristics of 
GP Series and Commander Double D coils. This is achieved by 
altering the pattern of transmit (Tx) and receive (Rx) fields of 
the coil, and how the control box interprets the response. Each 
switch position changes the electromagnetic field of the coil, 
thus giving better performance in certain situations.
Coils not specifically designed by Minelab may behave 
erratically, or be ineffective, in either the Mono or  
Cancel positions.
Cancel, Mono, Double D 
Cancel, Mono, Double D 
Coil/Rx 
Changing the transmit (Tx) and receive 
(Rx) fields of a Double D coil.
Transmit (Tx) 
Receive (Rx)
Double D Cancel
+ –
Tx Rx Tx RxRx
+
This diagram is a view of the internal coil windings, showing the different receive 
characteristics of the three Coil/Rx switch options.
Monoloop
Tx RxRx
+ +
You will need to re-Ground Balance every time you select a 
new position for the ‘Coil/Rx’ switch.
Caution: Iron Reject will not work when using a  
Monoloop coil. 
Iron Reject will give the best results when used in 
conjunction with the specially designed Commander 
Double D coils.