A certain type of hydraulic remote position controller contains two resonant systems in its sequence. These are caused by the presence of resilience in the shaft connecting oil motor and mechanical load and by hydraulic resilience of the link between oil motor and oil pump.An idealized analysis of the system yields a sixth-order linear differential equation. When equalizing networks and possible non-linear effects are considered, the solution of the system equation by mathematical methods over a large range of parameters becomes impracticable.To ease the problem of computation an electronic simulator was designed. The paper includes a description of the simulator, and also an outline of the experimental work carried out to check its performance.