Well i did some very extensive testing of the SPP over the week end and using a variety of different coils. Firstly i wish to say that the SPP will not signal off on basalt compared to my SD2200v2. A basalt rock that the SD will scream on barely makes a murmur on the SPP.
However i was able to find areas were the SPP signaled in the basalt soil. These were concentrated spots of basalt soil much like clay domes. The SPP responded on these with a very noticeable high tone signal.
After ground balancing the SPP in all conductivity (switch is install on my SPP) and gain of 5. I switched to Low conductivity and turned gain up to 10. I then adjusted the ground balance slighty positive half a notch and the responding ground disappeared only producing occasional chirps every know and again from these spots. I then buried a 0.2 gram piece of gold approx. 2" down and the SPP made a clear signaled on it . I then buried a 1 gram nugget approx 4" down and once again the SPP signaled on it.
I then tested the SPP's depth of those targets with the ground balance spot on and did notice an improvement in the signal strength on all test targets. So the off setting of the ground balance can remove unwanted signals, but there is a slight trade off on out right depth. So long as you don't shift the ground balance to much it should not be a problem.
I hope this helps, Roscoe.
However i was able to find areas were the SPP signaled in the basalt soil. These were concentrated spots of basalt soil much like clay domes. The SPP responded on these with a very noticeable high tone signal.
After ground balancing the SPP in all conductivity (switch is install on my SPP) and gain of 5. I switched to Low conductivity and turned gain up to 10. I then adjusted the ground balance slighty positive half a notch and the responding ground disappeared only producing occasional chirps every know and again from these spots. I then buried a 0.2 gram piece of gold approx. 2" down and the SPP made a clear signaled on it . I then buried a 1 gram nugget approx 4" down and once again the SPP signaled on it.
I then tested the SPP's depth of those targets with the ground balance spot on and did notice an improvement in the signal strength on all test targets. So the off setting of the ground balance can remove unwanted signals, but there is a slight trade off on out right depth. So long as you don't shift the ground balance to much it should not be a problem.
I hope this helps, Roscoe.