ETS Solutions

Amplifiers for Unholtz-Dickie, Thermotron & more

Keep your vibration testing equipment at peak performance and maintain up-time with replacement amplifiers from ETS Solutions.  The ETS Solutions MPA series amplifier family is a wide frequency band digital switching (Class D) Power Amplifier designed with the latest state-of-the-art technology. A number of built-in features in the amplifier allow vibration testing to be simple and easy.  The MPA amplifier series are made for continuous operation with each configuration adaptable to any existing air-cooled or water-cooled electrodynamic shaker. Amplifier outputs range from 1 kVa to 360 kVa.

By upgrading from older inefficient amplifiers to the new MPA Series Power Amplifiers operators benefits the latest technology can offer. Older shaker systems are revived and the equipment’s useful life extended.

The MPA Series amplifier operates at over 92% efficiency; nearly double the efficiency of older amplifiers. Benefits include space savings as the amplifiers are smaller in size, air-cooled so heat exchangers are not required and significantly less power consumption due to higher efficiency levels. ETS Solutions amplifiers are built with reliable, COTS (commericial off the shelf components).

ETS replacement amplifiers are matched and plug-compatible to the vibration testing equipment to ensure no loss in performance or compatibility. ETS amplifiers work with any make and model shaker: Unholtz-Dickie (UDCO), Ling, Thermotron, LDS & MB Dynamics.


-High conversion efficiency (greater than 92%) for energy saving
-Highest ambient operating air temperature before de-rating (95F)
-High modulation switching frequency
-Low total harmonic distortion (THD) (<0.5% at typical testing frequency
-High Signal to noise ration (>65%)
-Exceeds ISO Peak current rating of 4-Sigma

User Interface

-Intelligent microprocessor logic control and monitoring system
-Interactive system interface
-Green back lit LCD for system status and diagnostic messages
-Auxiliary Interlock Unit (AIU) for additional safety interlock I/O points (optional)
-Remote control panel via RS485 communication (optional)

Safety & Reliability

-Soft-start and Soft-Stop circuits
-Detailed scope of system interlock protections
-International compliance to safety and EMC standards
-Totally air-cooled amplifier designed for continuous and safe thermal operation
-All-encompassing fuse protection for high current system components
-Designed to reduce reliance on mechanical switch gears witih CPU logic controlled
-Complies with USA, European, and International safety & EMC regulations

Safety & Maintenance

-12 kVa power modules configured with two self-reliant sub 6 kVa modules
-Interchangeable compact size power modules
-Space saving compact size design
-Easy maintenance and rapid servicing
-Worldwide spare parts support



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