A laboratory pulse generator, in which the output pulse occurs at a controllable time interval after an input signal, is described. The delay is obtained by means of a ``flip‐flop,'' or biased multivibrator, and is adjustable from 2 to 850 microseconds. The width of the output pulse is adjustable from 1 to 40 microseconds. An input signal of arbitrary wave form may be used at frequencies up to 100 kc per sec. Pulse or high frequency sine wave inputs of 0.2 volt or more will operate the instrument while larger input signals are required for sine waves of lower frequency. The delayed pulse is delivered at low impedance with a maximum amplitude of 150 volts. A negative synch. output pulse, coincident with the start of the delay, is provided. Possible modifications and simplifications suitable for special applications are discussed.