British Army Mine Detector No. 4c Set Original Items

Official description of this unit: “The United Scientific Instruments No 4C mine detector was the standard mine detector of the British Army from 1968. Earlier models were the No 4 and No 4A. The No 4C comprises a search head mounted on a telescopic handle, an amplifier unit, headphones and connecting cables. For transport, the equipment is disassembled and carried in a wooden case, which also contains the spare battery, test boxes, extension cables and other accessories. The search head contains two mutually reacting inductance coils. Inductance is adjustable by means of a dust core trimmer assembly; when correctly adjusted, the mutual inductance of the two coils is in balance. When any metal component is brought within the field of the coils, the balance is distorted, resulting in an oscillating difference potential. This is then amplified by the amplifier unit and fed to the earphone as a distinctly audible signal. There are two modes of operation, one for detecting metallic mines in normal soil and the other for detection in heavily mineralized ground, or if there is likely to be metallic contamination on the surface. The mode of operation is selected by a switch on the amplifier unit. During use, the telescopic pole is extended, and one end is strapped to the forearm while the other is attached to the search head. The amplifier unit (which also contains the batteries) is clipped to the operator’s belt, and both the search head cable and earphone lead.”

All are sold in “as is” condition and we do not guarantee functionality, but all appear to be in good condition.

Just great for display or for finding the mines in your back yard perhaps. Good to Very Good condition. Very Few Only.

We do have just a few sets that are packed in a fitted wood transit chest and a few other accessories are included (Item Code BD1003). MKIV Turtle Helmet is not included but is available separately.