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Selectable Frequency Gb???


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It is recommended in the manual and I always do.

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I assume we are talking the Impact? Nokta Impact Owners’s Manual page 10:

“Once the ground balance is set, it will remain satisfactory for a long time in most areas. However, if you encounter an excavated, backfilled or geologically composite soil structure, a ground balance should be performed again to adapt to the varying soil structure. In addition, re-ground balancing is recommended if you change the operating frequency of the device (5kHz/14kHz/20kHz) in certain ground conditions.”

I am not sure what the “certain ground conditions” means but I would always check the ground balance after a frequency change. It may be that you discover that in some milder ground it is not necessary.

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