The electromusical instrument "Tom-1501" was produced in the early 80s of the 20th century by the Tula Association for the production of musical instruments "Melody". "Tom-1501" is an electronic musical instrument with orchestral effect of portable type, assembled on semiconductor devices, intended for solo performance of musical works of any genre and accompaniment as part of an ensemble. It is a single-instrument keyboard instrument imitating the sound of a piano, harpsichord, orchestra string band consisting of violins, violas, double bass; brass instruments. The instrument consists of the following blocks: master oscillator, twelve manipulators, infra-low frequency generator, delay line, breaststroke filter, filter unit, output amplifiers, power supply, volume pedal, sustain pedal. The formation of all the tones is carried out from a single master oscillator, which excludes the possibility of detuning the instrument during its operation. The timbre of the instrument is based on the synthesis of 6 left and 5 registers of the right side of the keyboard. Tom-1501 allows you to quickly change the character of the sound during the performance, using effects: sustain, vibrato, chorus. Technical specification: Full keyboard volume, Octave 5 1/12. Full sound range, octave 6 1/12. Volume of the bass section, octave 2. Number of registers 7. Relative frequency instability of the master oscillator,%, not more than 0.3. Accuracy of the system,%, not worse than 0.035. Frequency modulation of the fundamental tone,%, no more than / - 3. Adjusting the pitch of the instrument,% / - 6. Nominal output voltage at the equivalent of the load With kOhm at the outputs, V, mono 0.3, stereo 0.2, piano 0.2 , telephone (at a load of 8 ohms) 0.3. Background noise level in the pause, dB, not more than 55. Power consumption, W, not more than 15. Supply voltage, V from AC mains 220. Overall dimensions, mm 920x360x195. Weight without stand, kg, not more than 13.