Second-hand Ballard Source

Second-hand Ballard Source

Technical Specifications for the second-hand Ballard Source

  • Year : 2004
  • In good shape
  • Dimensions: Basic Tool Length – 24 in
    Body Diameter – 2.75 in
    Body –
    Length – 15 in.
    Cable – 0.5 in. dia. (length to suit).
  • Approx. Wt : Basic Tool 2.75 in. dia. – 12 lbs.
    Cable – 0.25lbs. per foot.
  • Center Frequency: Approx. 400 Hz
  • Manufacturer : RT Clark


Second-hand Ballard Source : Borehole seismic source

The Ballard Source is a tool designed to enable engineering geophysicists and geotechnical engineers to conduct high quality P- and S-wave crosshole tests in accordance with ASTM standards. We recently decided to sell a second-hand Ballard Borehole Seismic Source to renew our park.

Working principle

Unlike P-wave energy which appears first on a seismic record, S-wave energy must be enhanced to be positively recognized within existing wave trains. This can be best accomplished by a reverse polarity seismic source rich in S-wave energy. Since the polarity of an S-wave can be controlled (unlike the P-wave) the seismic source can provide a positive identification if it is capable of S-wave phase reversal.

This compact tool enables a one or two person field crew to perform tests to depths of more than 150 feet without tripods or special purpose handling equipment. Extensive field tests have shown that the design concepts are sound. Repeatability is excellent, so signal stacking serves to enhance the P- and S-wave trains while repressing background noise.

Second-hand Ballard Source

We propose second-hand  Seismic Borehole Source. This equipment was made in 2004 and it is in good shape. Please do not hesitate to contact us for any further information you may require. 

Second-hand Ballard Source

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