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  1. boreholelogger

    Magnetic Markers on Steel Cable

    I was wondering if anyone new where I could find some information on a system which I have heard exists, that magnetises sections of a wire-line cable (Steel Cable). For example magnetises a small section on the cable every 10ft. The cable is then winched in and out of a muddy hole in the...
  2. boreholelogger

    Nuclear Radiation as you move away from a source

    Here's one for the nuclear guys!. Does anyone know where I can find equations for the radioactivity emitted from a CS137 source as you move directly away from it in a straight line?.
  3. boreholelogger

    Long Cable Power Issue

    I have a 2.565km piece of wire-line 4 conductor cable wound onto a winch that is used in the mineral exploration industry. The cable has an 85 ohm/km resistance which means that there is 218 ohms resistance from one end of the cable to the other, (Where the camera will be connected) and 218 ohms...
  4. boreholelogger

    High Voltage Power Supply

    Hi, I am trying to design a High Voltage power supply circuit that can produce 1250V @ 0.1mA. This supply has to run off a 9V battery and thus current consumption is a big problem. I was wondering if anyone had any idea of how to go about it?. Thanks, boreholelogger

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