The circuit of the spectrotron with five stable states is based on a magnetic synthesizer of a multiple-extremum characteristic. Its stable frequencies are 25, 42, 27. 1, 28. 65, 30. 15, and 31. 8 kHz with an instability less than equivalent to 0. 5% in the frequency in any of the stable states and an output-signal harmonics coefficient less than equivalent to 12%.