Jackpine Savage
Active member
the ground balance setting applies to in ground performance on the terras.
Here's a few tidbits I and others found with the 70
Setting to a couple numbers postive (higher number) can give better results in tough conditions. Some say lower numbers work better
true neutral ground will result in very low numbers. Very little mineralization but what is there is iron based so it reports that with the low number. Once on a fresh water beach using the 3 khz coil and in beach mode while trying to manually GB the 70 no tones were heard even with the GB set down to zero (0), turned the tracking on and it shot up to the 27-30 range which is what the factory deems a "preset setting". So it seems the software knows when to apply a needed correction in certain conditions. Preset GB settings on non adjustable detectors work very well in low mineral as we all know.
Iron hunting, Yup as a lot of us found out tracking on is the ticket most of the time. The GB number displayed may be higher (a more positive number) than the true GB setting and vary a lot as the software sees the effect of the iron but, performance on co-located non ferrous is improved. In my ground the tracking GB numbers ran near the factory preset number of 27 but varied a lot as you hunted due to the iron. Someone, maybe it was Steve, suggested manually setting the GB in the 27-20 range for iron hunting.
What do I take from this? well the engineers seem to have it figured out... whether low mineral or iron hunting just let the detector do its thing. Have they given us a useful tool with the ability to manually offset the GB? We will have to wait and see but my guess is it is more than just something that marketing wanted added to sell detectors.
Tom
Here's a few tidbits I and others found with the 70
Setting to a couple numbers postive (higher number) can give better results in tough conditions. Some say lower numbers work better
true neutral ground will result in very low numbers. Very little mineralization but what is there is iron based so it reports that with the low number. Once on a fresh water beach using the 3 khz coil and in beach mode while trying to manually GB the 70 no tones were heard even with the GB set down to zero (0), turned the tracking on and it shot up to the 27-30 range which is what the factory deems a "preset setting". So it seems the software knows when to apply a needed correction in certain conditions. Preset GB settings on non adjustable detectors work very well in low mineral as we all know.
Iron hunting, Yup as a lot of us found out tracking on is the ticket most of the time. The GB number displayed may be higher (a more positive number) than the true GB setting and vary a lot as the software sees the effect of the iron but, performance on co-located non ferrous is improved. In my ground the tracking GB numbers ran near the factory preset number of 27 but varied a lot as you hunted due to the iron. Someone, maybe it was Steve, suggested manually setting the GB in the 27-20 range for iron hunting.
What do I take from this? well the engineers seem to have it figured out... whether low mineral or iron hunting just let the detector do its thing. Have they given us a useful tool with the ability to manually offset the GB? We will have to wait and see but my guess is it is more than just something that marketing wanted added to sell detectors.
Tom
