The AVMH family of low jitter, high amplitude impulse generators includes units providing pulse widths in the range of 200 ps to 1 ns, amplitudes from 10 Volts to 100 Volts, and pulse repetition frequencies as high as 25 MHz. Model AVMH-1-C generates a 0 to 10 Volt impulse. The pulse width (measured at the 20% rise point) is adjustable from < 200 ps to > 1 ns.