This paper describes a fast rise, low impedance pulse generator that has been developed at the Lawrence Livermore National Laboratory. The design specifications of this generator are: 50 kV operating voltage, l ohm output impedance, subnanosecond rise time, and a 2-10 nanosecond pulse length. High repetition rate is not required. The design chosen is a parallel plate, folded Blumlein generator. A tack switch is utilized for its simple construction and high performance. The primary diagnostic is a capacitive voltage divider with a B probe used to measure the current waveform.