Network tube radio receiver '' 9N-4 ''.
Tube radios.DomesticThe network tube radio receiver "9H-4" may have been produced by the Voronezh plant "Electrosignal" since 1937. "9H-4" is a 9-tube tabletop receiver of the 4th development. For its development of the model, the technical documentation of the RCA company (USA) was used. The receiver uses radio tubes: 6K7, 6L7, 6Zh7, 6X6, 6F5, 6F6, 6E5, 5TS4S. In a significant series of radios produced, foreign analogue lamps were used. Radio wave ranges: DV 715 ... 2000 m (X), SV 175 ... 575 m (A), intermediate waves 46 ... 170 m (V) and KV 13.5 ... 48 m (C). The sensitivity of a receiver with a good outdoor antenna on all bands is about 50 µV. Adjacent channel selectivity 46 dB. Output power 2 W. The band of reproducible sound frequencies is 80 ... 6000 Hz. Power consumption from the network is 75 watts. The dimensions of the case are 580x310x420 mm. The weight of the device is 26 kg. There are 5 control knobs on the front panel of the radio. On the left there is a music-speech switch combined with a mains switch, then the volume, a double knob for tuning to a frequency with a vernier, then a range switch and a treble tone control. The radio is enclosed in a wooden case. Each band has its own separate scale, calibrated in KHz and MHz, which changes when the bands are switched and is visible through the cutout in the metal frame. On the lower scale calibrated in UE, you can easily remember the tuning to an interesting radio station. The tuning indicator is made on the 6E5 lamp.
