Abstract: The invention relates to a single chute, multidenomination, coin validator using a transformer to generate a transient signal whose amplitude varies with the denomination of the coin sensed by the transformer. The signal may operate more than one of a plurality of "window" type comparators corresponding respectively to the valid denominations but, if so, it causes sequential operation thereof. A control signal is generated at the peak of the signal amplitude and the criterion of validity is the coincidence of the control signal and a comparator output signal. A coin gate may be used to prevent valid coins being retrieved from the coin chute.