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The stationary transistor radio "Calendar informer" since 1975 produced the Murom plant RIP. Calendar informant is designed to record notes or events on a paper tape, moved with pens left or right. A little higher, the calendar mechanism is tilted. For setting the current date, month and day of the week there are four pens. Setting the year is not. The direct gain receiver is assembled on 6 germanium transistors and covers the wavelength range from 300 to 1800 m. The sensitivity of the receiver to a magnetic antenna is 30 mV / m, the selectivity is 8 dB. Rated output power 80 mW, maximum 150 mW. The range of reproducible sound frequencies 300..3500 Hz. Power - battery "Krona". Dimensions of the calendar 250x175x85 mm, weight 630 g. To change the position of the magnetic antenna horizontally to the right or left within 90 degrees and to improve reception there is a front knob.