[en] To improve the beam parameters on the targets and to increase the possibilities of physical experiments the reconstruction of 1.5 m isochronous cyclotron with deep regulation of ion energy is carried out. The description of the main cyclotron systems is given: electric power sypply and control, the extraction and the beam transport, rf, vacuum, watercooling and diagnostics. The maximum frequency of the accelerating voltage was 20 mHz. For measurement of spatial and timing distributions of ion beam intensity, electric probe capacitive pick-up electrodes and scintillators of beryllium oxide are used. As a result of modification on the isochronous cyclotron produced were the beams of multi-charge ions with beam current of mkA: ⁶Li³⁺-2; ⁷Li³⁺-2; ⁹Be³⁺-2; ¹²C⁴⁺-30; ¹⁴N⁵⁺-13; ¹⁶O⁶⁺-1 correspondingly. Possibility of cyclotron use for time-of-flight spectrometry of fast neutrons is shown