SilverFinger
Sr. Member
- Apr 17, 2008
- 326
- 158
- Detector(s) used
- White's MXT, Eagle Spectrum, Treasuremaster
- Primary Interest:
- All Treasure Hunting
Why do some of the machines only require 4 AA batteries (6vDC) and some require 2 9 volt batteries? My limited electronics background would suggest that 18v current could technically provide a stronger electromagnetic field over 6 volts.