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Brüel & Kjær Type 4801 vibration exciter magnet / field coil assembly.
Heavy laboratory vibration equipment assembly believed to be from a B&K Type 4801 electrodynamic vibration exciter system.
This is an incomplete assembly, not a complete vibration shaker. It includes only the components shown in the photos. The exciter head, amplifier/power supply, cooling equipment, cables, and other system components are not included unless laboratory equipment
Please examine all photos carefully for exact condition, configuration, connectors, and included components. Because there is no clearly visible manufacturer/model identification plate on this assembly, the buyer should verify compatibility with their application.

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