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I'm currently working on a new TV series about military technology, and am looking into the history of the Mine Detector Polish MkI by Josef Kosacki and it's inner workings. I'm looking for a diagram to help clearly explain how the device worked in order to turn the inner workings into a CGI graphic and was just wondering if someone on here may either know where I can find or a diagram to explain it's inner workings, or could even draw me one??
What I understand so far is that:
The Polish detector had two coils, one of which was connected to an oscillator which generated an oscillating current of an acoustic frequency. The other coil was connected to an amplifier and a headphone. When the coils came into proximity to a metallic object the balance between the coils was upset, causing the oscillator to osscilate at an abnormal frequency, and the headphone reported a change in signal. The equipment weighed just under 14 kilograms and could be operated by one man.
But it's a bit of a struggle trying to visualise that!
Any help would be really appreciated!
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You could try a post on historic military vehicle forum(HMVF) or vintage amateur radio society(vmars) both groups have people well versed in things old and military,let us know how yuou get on.
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I can’t help directly, as my area of expertise is with firearms and ordnance, but ‘the man’ to contact on here regarding WW2 military equipment is Stephen Taylor, who goes by the username ‘RRPG’.
Also, you could try the British Ordnance Colectors Network, though they primarily collect inert ordnance, they also have lots of original manuals and instructional diagrams of various military equipment. There are members who (I believe!) have one of the Polish detectors in their collection on the BOCN forum.
Best of luck in your search.
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Inside the metal detector
The authors are both active members on Geotech1 website
Have you seen the article from the 1917 popular mechanics