I remember John saying in a previous post he had sent Garrett some Canadian coins to tune to.
Before I buy another machine (or two)
, probably next year, I'll send them an email and ask.
Most of the modern Japanese coins show as either nickel or coins on the Ace 150, while the 500 yen ones tend to jump around. The 500 yen (new ones from year 2000) are composed of 72 percent copper, 20 zinc, 8 nickel. (pre year 2000 were 75 percent copper, 25 nickel).
The one hundred yen coin, and the fifty yen coins too, usually show as nickel on the Ace's and lock on well, they have 75 percent copper, and 25 percent nickel.
So, suspect the zinc in the new 500 yen is the culprit.
Certainly would be nice to pop out 500 yen (about US$4.20) coins every five minutes now wouldn't it?!
HH
Ian