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The Compass model 94B was a good no-frills detector sold newthrough out the 1970's and early 80's. It utilized a 10 turn tuning system with iron tuning in one direction and non-iron in the opposite direction. Because of this separation of metals in the circuitry, one could hunt for coins (non-ferrous metals) without much distraction from nails (ferrous) and other iron objects. The electronics were such that good coin and/or gold targets gave out sharp signals in most cases. The electronics were sensitive to dust and moisture that greatly reduced the units' ability to process signals efficiently. Keeping the detector clean and free from dirt is essential. Still a fine coin shooter and jewelry finder in top condition. Used ones in as-new condition still bring close to the original new price of around $135.00

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