Received the Cors Shrew coil yesterday. Coil measure 3.5" X 6.5" DD. Tried it side by side to the Makro 4.6" X 5.1" OOR coil and the newer 5.5" round coil. I could tell no difference between the three depth wise on US coins, and I couldn't tell any difference between the Racer and the Racer 2. My test showed the following:
Quarter 9"
Dime 7.5"
Penny 7.5"
Nickel 6"
What I found interesting was that the Racers with the 5.5" X 10" and 7" X 11" coils will air test a nickel farther away than a penny, dime, or quarter, but the Racer will detect a penny, dime, or quarter farther away than a nickel with the smaller coils.
Just in case anyone's interested.
Quarter 9"
Dime 7.5"
Penny 7.5"
Nickel 6"
What I found interesting was that the Racers with the 5.5" X 10" and 7" X 11" coils will air test a nickel farther away than a penny, dime, or quarter, but the Racer will detect a penny, dime, or quarter farther away than a nickel with the smaller coils.
Just in case anyone's interested.