Network tube radios '' Record-53 '' and '' Record-53M ''.

Tube radios.DomesticRadio receivers "Record-53" and "Record-53M" from 1953 and 1954 produced the Berdsk and Irkutsk radio factories. Receiver "Record-53" - modernization of the previous model "Record-52". It differs from its predecessor in a changed appearance. Internal changes affected the low-frequency part of the circuit and the replacement of the loudspeaker from 1GD-1 to 0.5GD-2, and later to 1GD-5. '' Record-53 '' network five-lamp superheterodyne, assembled on lamps of the metal series. A 6A7 lamp is used in the frequency converter. In the cascade of the UPCH, a 6KZ lamp. Detection, AGC and pre-amplification of low frequencies are carried out by a 6G2 lamp. In the final stage of the LF there is a 6P6S lamp. Kenotron - 6TS5S. Three control knobs are displayed on the front panel of the receiver: the left knob is the power switch and the volume control, the knob in the center is used for tuning, and the right knob is for switching ranges and turning on the `` pickup '' mode. The radio receiver is designed for power supply from an alternating current with a voltage of 110, 127 or 220 V. Ranges: DV 150 ... 415 KHz, SV 520 ... 1600 KHz, KV 3.95 ... 12.1 MHz. IF 465 KHz. Sensitivity in DV, SV 300 µV, KV 500 µV. Selectivity on the adjacent channel 20dB. Output power 0.5 W. The band of reproducible sound frequencies is 150 ... 3500 Hz. Power consumption 40 watts. Receiver dimensions 440x272x200 mm. Weight 5.8 kg. '' Record-53M '' has the design, design, scheme and characteristics like the '' Record-53 '' receiver. But there are also changes that have affected the low-frequency part of the model's circuit. A decoupling filter is introduced into the detector circuit. A transformer is used instead of an autotransformer. The C31 terminal lamp inserted into the anode circuit is included in the circuit when the `` Pickup '' mode is set.