Being that most pinpointers and the Simplex operate at 12 kHz, when the pinpointer is turned on the Simplex goes crazy from the interference. By switching the Simplex frequency from F2 to F1 or F3 it can help somewhat, but it is still very irritating. Looks like the only solution at the moment is to find a pinpointer that works at a different frequency, but I'm not aware of any that do. If you've found a pinpointer that doesn't interfere with the Simplex, please let us know. Will the Pulse Dive Pinpointer pair with the Simplex? Thanks