Rainy, rainy day, today. Wanted to go detecting but could not. Wanted to try out my new NEL Tornado 12x13 DD coil on my F75SE upgrade.
So, before mounting the NEL coil I decided to do an air test on the stock coil and then mount the NEL coil and air test it, too.
I set up the detector in the bedroom with a string stretched between the bottom of the coil and a wall. Marks on the string indicated 12 inches and more or less along the string.
The string was located about two-thirds of the way toward the front of the stock coil, and about center of the NEL coil (due to configuration of spokes of both coils).
The inch marks on the string were occasionally checked with a tape measure to be accurate distance from the bottom face of the coil.
All tests were conducted with sensitivity of 99 except the FA process where EMI required sensitivity be lowered to 80.
The cuff button used was a dug WW I cuff button.
Here are photos of the setup and photos of the tabular results:
So, before mounting the NEL coil I decided to do an air test on the stock coil and then mount the NEL coil and air test it, too.
I set up the detector in the bedroom with a string stretched between the bottom of the coil and a wall. Marks on the string indicated 12 inches and more or less along the string.
The string was located about two-thirds of the way toward the front of the stock coil, and about center of the NEL coil (due to configuration of spokes of both coils).
The inch marks on the string were occasionally checked with a tape measure to be accurate distance from the bottom face of the coil.
All tests were conducted with sensitivity of 99 except the FA process where EMI required sensitivity be lowered to 80.
The cuff button used was a dug WW I cuff button.
Here are photos of the setup and photos of the tabular results:
