People call me crazy but when v3.2 first came out I air tested a lot of coins...this must have been Dec 2013 timeframe. I have reloaded v3.2 a few times from the XP website and have noticed being able to hit deeper coins, especially in 4 kHz.
I first thought it was the difference between soils, but since moving to Colorado I have recovered a few 9-10" pulltabs and bottlecaps using 4khz. Switching to 12khz these targets come in clearer. Last time I hunted I found a 1/4" jean rivet at 8" in 4khz. It was just a blip of a signal in Full Tones, but was repeatable enough to where it aroused my curiosity.
The soil "ground readings" here are not much different than what I'm used to in W Tennessee, usually run 80-87 so I keep GB at 85 manual setting. My machine is 2013 "vintage" and seems to have improved with reloading v3.2 from the website. I would think that making identical programs between both machines and then do some air and ground testing and see what happens.
Mine is almost always chatty no matter what freq I use except 18 kHz, and I rarely get into that one. Let us know what you find out...here's a thread on the subject: http://www.findmall.com/read.php?83,2206623,2206623#msg-2206623
I first thought it was the difference between soils, but since moving to Colorado I have recovered a few 9-10" pulltabs and bottlecaps using 4khz. Switching to 12khz these targets come in clearer. Last time I hunted I found a 1/4" jean rivet at 8" in 4khz. It was just a blip of a signal in Full Tones, but was repeatable enough to where it aroused my curiosity.
The soil "ground readings" here are not much different than what I'm used to in W Tennessee, usually run 80-87 so I keep GB at 85 manual setting. My machine is 2013 "vintage" and seems to have improved with reloading v3.2 from the website. I would think that making identical programs between both machines and then do some air and ground testing and see what happens.
Mine is almost always chatty no matter what freq I use except 18 kHz, and I rarely get into that one. Let us know what you find out...here's a thread on the subject: http://www.findmall.com/read.php?83,2206623,2206623#msg-2206623