Couple of photos of finished install of external ground balance, and threshold controls.
This was performed on a Cobra II, a detector produced for KellyCo by Discovery Electronics. The same modification would apply to the Discovery A & S Special as they are the same unit. This is a modification that can be performed by those that have good basic work habits of electrical board construction. This is a big, strong, easy forgiving unit.
They work well, and are good basic coin, jewelry hunters.
Mr. Bill
This was performed on a Cobra II, a detector produced for KellyCo by Discovery Electronics. The same modification would apply to the Discovery A & S Special as they are the same unit. This is a modification that can be performed by those that have good basic work habits of electrical board construction. This is a big, strong, easy forgiving unit.
They work well, and are good basic coin, jewelry hunters.
Mr. Bill