Аннотация:The Blazhko effect with a period of 11.0 +/- 2 days was detected in AH Cam on the basis of photoelectric B and V observations. A secondary wave with a period of 0.18128 day was detected in the light curve; this is shorter than the basic period (0.36873 day) by a factor of 2. The complex interaction of the two waves in the star shell is interpreted as the parametric excitation of motion in the third overtone.