Some time ago I came across 2 fairly old Compass metal detectors, one was a Yukon 99-1b and the other a 94b. The 99-1b appeared to be the most intact, except there was a layered resistor/potentiometer which had become toast because both of these machines had been outside for awhile, some months. Fortunately that was in the desert sw and not Florida.
I tried to rebuild the potentiometer, had three hours in the project, no luck, and then during desolder I killed the small auxiliary circuit board that the potentiometer was attached to. The batteries on that machine were weird, either three packs of 4 AA, or two packs of 4 AA and a 9 volt.
I tried various configurations and found some info online which helped a lot, thanks, but I could not get past the damaged parts. This detector did come in handy with the other detector, who had somehow along the line lost all its battery leads. It was a lot of hit and miss but I was able to use the wiring config of the 99-1b to figure out the configuration of the 94b, and even though I fried one resistor which I have yet to replace the thing fires up and is strong, it gets quarter easy at ten inches in the air. It has double d wide scan coil. I have never used Compass before but plan on putting this to use as backup or dedicate it to the truck. The 94B had one 4 pack of AA and one 9 volt, and though it looks like there was room for a 6pack of AA, the four pack works real well. Then there is a little receptacle obviously for a 9volt which 9 volt fits in perfectly.
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