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The lamp condenser microphone "19A-19" with the KMK-7 kit was produced, presumably since 1967, by the Leningrad Optical-Mechanical Association (LOMO). Universal microphone "19Ð-19" is intended for use in radio and television studios, in concert halls. Shakeproof. 6S6B lamps were used as amplifying, later 6S51N, later 6S31B and 6S37B, other lamps could be used. Unidirectional microphone. The working frequency range is 40 ... 15000 Hz. Irregularity of the frequency response - 8 dB. Load resistance 250 Ohms. Sensitivity 16 mV at idle. Microphone dimensions 40x155 mm. Weight 170 gr. The kit includes a power supply.