AccurateCalls
Senior Member
Still, I don't think most detectorists who buy a SMF detector would know about the specific situations to switch to single frequency, since most people who purchase a SMF detector aren't grizzled veterans of the hobby.AH! Yes, you guys have coins that range from low conductor to high. I can see why SMF would be a good choice. Here in the States everything we hunt for, coin wise, is going to be high conductors other than nickels.
I tend to use single frequency about 10-15% of the time and SMF the remaining portion. We have silver Russian wire money, which is like ~.5cm in diameter (or ~.2 inches)[ https://www.metaldetectingworld.com/wire_money_coins/coins_on_cent.jpg ], thin, which rings up like a very low conducting, tiny spec of aluminum. And we have silver coins that are HUGE, which have diameters roughly 2-3 times that of a US quarter. We have silver klippes, which are square, large and thick chunks of silver. We also have Swedish plate money which are gigantic, large plates of copper the size of dinner plates.
At least for coins here, there is no optimal single frequency.