Three coils of 2, 50 and 500 turns on a hard bakelite ring 165 mm dia.Compass box with anti-parallax mirror, metal dial graduated in deg. Cobalt steel Magnet and aluminium pointer. The needle is mounted on special hardened pivot.Mounted on a bakelite circular platform with four terminals marked with number of Turns. Tripod base with leveling screws.
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Ambala Cantt, Ambala, Haryana 