Regarding the pinpointing function on my Ace 250. Most of the time it works, sometimes with quirks. When I pp my target, as I sweep, I center the scale moving left to right, then pull the detector back towards me until the sound quits. That puts the target (standard coil) between the two rings, on the edge of the inner coil. If I want to de-tune the target, I will start just outside the tone area, and release and re-press the pp button. Normally, the tone is fine and the search area is much more defined. The problem is, that on the second depression, sometimes there is no tone at all, sometimes is does not retune, and sometimes it changes to just a whisper where you really have to strain to hear it at all. Normal???
While on the subject of pinpointing, I'll pass on something I've learned the hard way. I normally carry my Garrett pinpointer along with my steel garden shovel in my left hand together, while sweeping with my right hand. When I hit a target that I want to dig, I have been powering up my pp while still holding my little shovel. The result is that I have de-tuned the pp, and it will only give me about half power. I was getting quite frustrated with it, thinking it was on the blitz when all along it was my fault. Keep it clear of all metals when powering it up, and it will work just fine. Unless, of course, you want to detune it.
While on the subject of pinpointing, I'll pass on something I've learned the hard way. I normally carry my Garrett pinpointer along with my steel garden shovel in my left hand together, while sweeping with my right hand. When I hit a target that I want to dig, I have been powering up my pp while still holding my little shovel. The result is that I have de-tuned the pp, and it will only give me about half power. I was getting quite frustrated with it, thinking it was on the blitz when all along it was my fault. Keep it clear of all metals when powering it up, and it will work just fine. Unless, of course, you want to detune it.