Finally took it completely apart and used a jeweler's loupe to look at the solder joints. Found one cold joint in the GB circuit and poured 180 proof in the GB control.

(No not the drinking kind! Don't want to waste that!

) Took about two hours but it's up and running. New results of depth test looks like this in ground. penny-5-6", Nickel- 5-6", dime - 6-6 1/2 ", quarter- 6 1/2 -7 ".
Not the best but it works! I'll keep on

and see what happens.
You inspired me to work on the thing instesd of junking it. Thanks.
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WB4RAV