Abstract: In a radio having power tuning apparatus activated by a latching switch in a sweep position and deactivated by the latching switch in a stop position, the radio further having apparatus responsive to a received radio frequency signal for switching the latching switch to its stop position, first apparatus is provided for switching the latching switch to its sweep position, second apparatus is provided for manually disabling the first apparatus, third apparatus is provided for activation of the first apparatus, if not disabled, a first predetermined time delay after the switching of the latching switch to its stop position, the first predetermined time delay permitting recognition of a received radio signal and activation of the second apparatus, and fourth apparatus is provided for deactivating the first means a second predetermined time delay after the switching of the latching switch to its sweep position, the second delay being just long enough to ensure latching of the latching switch in its sweep position