Proton 402

IMPORTANT - likely mis-categorised: the Proton-402 is a compact-CASSETTE recorder, not a reel-to-reel. Built from 1981 by the Kharkov Radio Plant 'Proton' (USSR) and based on the Proton-401, it is a portable mono cassette machine (renamed Proton M-402 from 1987). Configuration: cassette tape speed 4.76 cm/s; wow & flutter 0.3%; frequency range about 40-12,500 Hz (line out) / 200-7,000 Hz (speaker); rated output 1.2 W; automatic record-level control, tape-type switch and treble tone control; powered from six A-343 cells or 220 V mains. Flagged because it does not fit the reel-to-reel theme of this list - please confirm whether it belongs here.