Looking at the label on the larger integrated circuit, it looks like it says Cibola1.0.
The one trim pot you have labeled is the ground balance trim pot. Using it to get better air test results will not help get better results hunting for targets in the ground.
In my opinion, now that you have fiddled with it, you have a few options:
-Carefully button it up and send it to the factory for a tune up to get it back to factory setting and then happily hunt with it.
-Ground balance your Cibola so it is slightly positive in an area that is pretty representative of you normal hunting areas and leave it as an unmodified detector with a fixed ground balance. If you have ground balance it well, you know how to set it up if your hunting conditions change a lot.
-Ground balance it using the power balancing method (search this forum to get the instructions). This will optimize the results in discriminate mode, but you will need to do this adjustment as ground conditions change. A Cibola with the ground balance adjusted a little bit too negative gives more false target soundings than I like to work with, so you would need to adjust more frequently. You can leave it stock to do this. If left stock, remember you need to be careful adjusting the internal pot. It is fragile and not designed for frequent adjustment.
-Modify the detector by adding a ground balance potentiometer to the front panel. Sven had directions on his web page. Or they are in the modifications forum at Findmall. Then you can easily ground balance the detector to the hunting conditions you have at hand. Except it won't adjust to ocean water or the wet sand at salt water ocean beaches. Should be good to go at most every other ground condition. You can use the power balancing technique to optimize for conditions or just use a normal ground balance technique.
Cibola mod courtesy of Sven
Cheers,
tvr
