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2. Automatic direction finder - Wikipedia

   en.wikipedia.org/wiki/Radio_Magnetic_Indicator

   A radio magnetic indicator (RMI) is an alternate ADF display providing more information than a standard ADF. While the ADF shows relative angle of the transmitter with respect to the aircraft, an RMI display incorporates a compass card, actuated by the aircraft's compass system, and permits the operator to read the magnetic bearing to or from ...

3. FuG 224 Berlin A - Wikipedia

   en.wikipedia.org/wiki/FuG_224_Berlin_A

   Magnetic deflection was used to produce the PPI display. The first design used two fixed sets of deflection yokes, at right angles to each other, and varying the drive signal to both of them by means of a goniometer. Later designs used the more conventional approach, where a single deflection yoke was physically rotated, in synchronism with the ...

4. Magnetometer - Wikipedia

   en.wikipedia.org/wiki/Magnetometer

   The current is then interrupted, and as protons realign themselves with the ambient magnetic field, they precess at a frequency that is directly proportional to the magnetic field. This produces a weak rotating magnetic field that is picked up by a (sometimes separate) inductor, amplified electronically, and fed to a digital frequency counter ...

5. Compass - Wikipedia

   en.wikipedia.org/wiki/Compass

   A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.

6. Cathode-ray tube - Wikipedia

   en.wikipedia.org/wiki/Cathode-ray_tube

   By rotating a pair of magnets together, preserving the relative angle between them, the direction of their collective magnetic field can be varied. Overall, adjusting all of the convergence/purity magnets allows a finely tuned slight electron beam deflection or lateral offset to be applied, which compensates for minor static convergence and ...

7. The best stocking stuffers for men, from tools to Tile Mates

   www.aol.com/lifestyle/best-stocking-stuffers-for...

   Collapsible Magnetic Parts Tray Set. $25 at Amazon. ... The Thermopop 2 features an auto-rotating, 1 ¼ inch backlit display, the ability to provide you with a temperature reading within 2-3 ...