Characterizing the waveshape of voltage and current transients on distribution systems caused by lightning events has been of considerable interest. A solid state recording device for this purpose was developed in 1984 with high sample rate capabilities and the ability to operate for extended periods unattended. One hundred of these recorders were fabricated and installed on utility distribution systems beginning in 1985. Triggered lightning tests were performed in 1987 and 1988 to further characterize performance of the recorder and transducers. Design and operation of the recorders is discussed.