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Gp 3500 mods

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Steveo1:
Hi woody I'm doing a favour for my mate Gordon. he got his 35 modified by you just wondering can you please  give us some information on the settings and information on how to run it smoothly. thank you regards Steve

woody:
How long ago was it done? What controls have been added?

Steveo1:
About 17 months ago it has 2 round dials 1for frequency and 1 for gain. Thank you.

woody:
Set the frequency to half way if using a 11"or 12" coil. If bigger set the frequency to lower if smaller coil increase thr frequency, then set the gain to half and ground balance the detector, swing the coil and increase or decrease the gain so the detector is at just below the point of ground noise, then ground balance again and go swinging.

Steveo1:
Ok thank you. I will give it a try.

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