Thought you guys would like to see the metal detectors that were used in the early 60's.
This is a Metrotech 220 metal detector. It operated on a 9 volt battery. There was no
on/off switch as such. To turn the detector on you plugged in the headset and unplugged
it to cut it off. To ground balance the machine you used a wooden popcicle stick to turn
the screw on the coil head. When you could no longer hear the tone, the detector was
ready for use. The sensitivity dial was used to determine the size of the object under
the coil. A lead bullet would show a 5 and a brass buckle would show a 20+. The
trouble was there were so many objects in between these two items, one had to dig
every signal in order to not miss something good. I receovered several U.S. buckles
at 9" but most items recovered were in the 1" to 6" range.
TomB
Should have added...A piece of aluminum pipe was used to make a handle and covered in foam. It was then attached to the detector handle and shaft. The small handle would kill your wrist after a short time hunting.
This is a Metrotech 220 metal detector. It operated on a 9 volt battery. There was no
on/off switch as such. To turn the detector on you plugged in the headset and unplugged
it to cut it off. To ground balance the machine you used a wooden popcicle stick to turn
the screw on the coil head. When you could no longer hear the tone, the detector was
ready for use. The sensitivity dial was used to determine the size of the object under
the coil. A lead bullet would show a 5 and a brass buckle would show a 20+. The
trouble was there were so many objects in between these two items, one had to dig
every signal in order to not miss something good. I receovered several U.S. buckles
at 9" but most items recovered were in the 1" to 6" range.
TomB
Should have added...A piece of aluminum pipe was used to make a handle and covered in foam. It was then attached to the detector handle and shaft. The small handle would kill your wrist after a short time hunting.