A portable diagnostic system is under development and construction for use in commissioning the SSCL LINAC. This system is being used during the construction of the LINAC, and will be used to commission each section of the accelerator as assembled. The diagnostic system consists of a p o W l e ultra high vacuum system, high speed actuators, high density (128 channel) diagnostic heads, x-ray detectors, and high density VXI 128 channel amplifier arrays. Various innovative designs will be described. These designs led to high density wire spacing, high frequency, wide bandwidth, low cost amplifiers, and compact systems. State of the art manufacturing techniques were employed as a result of the joint interaction between the SSCL and Allied-Signal.