Uralec (Kombinir.) 1959
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Radio "Uralets" in 1959 prepared for the release of the Chelyabinsk radio plant. Probably the most mysterious receiver that no one saw. A lot of copies are broken in disputes who released it and how it looked. Finally, this year (2014), in a conversation with comrades at the Krasnodar radio market, one, probably an 80-year-old grandfather, said with confidence that he saw such a receiver and even twisted it when he was in the practice of an installer in Chelyabinsk in 1960, which would then work on Krasnodar ZIP and what it looks like on receivers "Voronezh" and "Strela", just a copy but half transistor. He no longer remembers the details, but that in the back was a pair of such receivers, that's for sure. I won"™t argue that this is true, but according to his story and with the help of Photoshop (changing the name), I imagined what the Uralets receiver looked like and I will draw up a short TX using the diagrams. The electrical circuit of the receiver in terms of the radio tubes is very similar to the circuits of the Voronezh and Strela receivers, which completely admits the external similarity. Combined receiver "Uralets" is designed to receive programs of radio stations in the Far-East and CB ranges. The sensitivity of the receiver is about 400 µV. Selectivity of about 20 dB. Frequency range 200 ... 4000 Hz. The terminal part of the low-frequency amplifier is made on transistors on a transformer circuit with 6 volt power. The anode voltage converter is powered by a powerful transistor and is also powered by a 6 V battery. The glow of all radio tubes is powered by a standard and 1.2 volt battery. Apparently, while the receiver was preparing for release, the second variant of the electric circuit matured, where the radio tube performing the functions of the HRO, the detector and the preamplifier was abraded, and another transistor and the detector diode were installed instead. It"™s not known to me how the two options worked, it"™s not for me to judge, didn"™t see and didn"™t hear why the radio "Uralets" didn"™t go into production.
Documentation:
Information from collection of Valery Khartchenko