Low frequency amplifier "UOS".
Amplifying and broadcasting equipmentThe terminal studio amplifier "UOS" has been produced since 1932 by the hardware plant named after T. Kazitsky. The amplifier "UOS" is a terminal amplifier with an output power of about 6 W and is intended for small radio broadcasting nodes with a load of several dozen radio outlets. The amplifier works in conjunction with the "UPS" preamplifier and the "V-50" mains rectifier.