Hello all, new to the site, Looking for some help with my whites beach hunter 300 id detector. I am having trouble trying to set it up, I have the user dvd but cannot seem to get it tuned. I can turn as instructed in the dvd but cannot get a sdeady hum, it jumps all around and the green light keeps flashing, batteries are new, this is all in free air, I followed the dvd and tried setting it in diffrent ways but still the same results. I have had this a few years but have just retired and want to start some serious hunting on the beaches around Pensacola Fl. any ideas out there ?