DuoBase System


The LW139.141-75D6 Flexure Table system combines our ET-139 permanent magnet field shaker and PA-141 linear amplifier together with our 6 inch square Flexure suspension Table. This combination provides a large mounting surface with increased load carrying capacity for larger or heavier than normal test specimens not requiring the force of a larger shaker system. The unique flexure suspension table guidance eliminates the requirement for the oil found in slip table systems. This oil-less design allows operation at other than the horizontal orientation, and adds increased suspension guidance reducing the effects of heavy and off-center loads on the shakers armature suspension system.. The Table flexures are fully rated for 1 inch p-p operation, and the shaker can be uncoupled from the table for operation in its normal vertical orientation with specimens mounted directly to the shakers armature.

The air cooled PA-141 linear amplifier is direct coupled to the shaker to give the maximum performance at low and high frequencies. Dual meters display the system operating levels and complete shaker and user interlocks help protect the system from accidental abuse.

General Specifications
Sine force 75 lbs force pk
Random force 28 lbf rms random
Shock force 75 lbf pk shock
Frequency Range: DC to 6,500 Hz
Maximum Acceleration:
        Horizontal, w/ Slip Table

        Vertical, no Slip Table

20 g pk, bare table
5.5 g pk, 10 lb. load
3.2 g pk, 20 lb. load

75 g pk, bare table
38 g pk, 1 lb. load
13 g pk, 5 lb. load
Maximum Displacement: 1.0 inch pk-pk, bare table
Cooling: Amplifier: forced air
Shaker: cooling vacuum
Power Requirements: 3000 VA @ 200, 220, or 240V*, single phase 50/60 Hz
System Components
ET-139 Electrodynamic Shaker
PA-141 Linear Power Amplifier
DB-139 - DuoBase
CB-152 Cooling Blower
Interconnect Cables and Hoses


**100V, 110V operation requires optional step up transformer.

System Options
VL-144/VL-145 Vibration Controller
SC-121 Sine Servo Controller
SG-135 Manual Sine Controller
Rack Cabinet
Accelerometer Package
SI-139 Base Isolation Mounts