I have seen no real evidence that the PDK does anything different than what Max said. I hear only talk from people who claim it will find long range. If anyone has an exact replica of the Alonso pistol that will really find gold at 10 feet distance, then they can easily win the $25,000 prize money that Carl offers.
I have not seen this happen yet. What is the reason?
Are they still trying to protect the propriety of the Alonso design? Well guess what? We found out this design was copyrighted years ago by the Heathkit company when they designed the main circuit. -- So no problems here. Even if the circuits were proprietary, they do not have to be revealed in order to win the $25,000 prize.
So what other reason?
Are the owners of the working Alonso replicas finding so much valuable treasure that they don't have time to waste on some small $25,000 prize?
Best wishes,
J_P