They have been manufactured at the Leningrad TEMP plant since 1985. The bear and tester in the photo are for demonstration purposes (not included and not sold)! Sound pressure level at nominal power at a frequency of 500 Hz: 94 dB.
MATCHED PAIR - tubes has identical electrical characteristics. We test our tubes on High-End Soviet Tube Tester L3-3. 100% garanty working. Accuracy of selection is 3%.
MATCHED QUAD - tubes has identical electrical characteristics. We test our tubes on High-End Soviet Tube Tester L3-3. 100% garanty working. Accuracy of selection is 3%.
Orders are sent from a relatively safe region of Ukraine. Good luck!
Этот товар – редкий советский военный громкоговоритель ГУ-20М с двумя усилителями У-10М. Эта винтажная аудиотехника была произведена в Советской России и является предметом коллекционирования для любителей винтажной электроники.
Model: 409D (409Д). Elektronika 409D TV Unit. A digital converter box is required to receive modern signals. Design: A classic "Space Age" industrial look in a sleek black plastic casing with a robust carrying handle.
NOS K73-22 PETP. 022uF 630VDC. Lot of 10.
Good luck ! Orders are sent from a relatively safe region of Ukraine.
Price 5 rubles of the Soviet Union.". The radio device is new, never in use. "Rich" inheritance of a grandmother who passed away.
Attention, the tubes are not in the original polystyrene packaging, for this reason some tubes may have scratches or very slight bumps... Military equipment, "OTK", high reliability. Military quality check passed (rhombus) The tubes are never used. Old stock. THE BIND IS FOR 2 TUBES GI-7BT, MILITARY,TROPIC!!! High quality made for the military equipmentMade in USSRMilitary equipment Type Pulse tetrodeCathode type Oxide, indirect heatingApplication field Oscillation UHF in continous mode and pulse mode with anode modulation in special equipmentBrief application OscillationDimension 110,5mm X 65mmMass 330 gNormale anode voltage 1,3 kVFilament voltage 12,6 VFilament current 1,8 - 2,05 AMutual conductance 20 to 26 ma/VOutput power 350W/ 11 KW in pulseMax. anod voltage 2,5KV/9 kV in pulseMax. operating frequency 18 cmAmbient temparature ,°C -60 to +100Relative humidity at up to +40 °C 98% Decoding the triode marking: GI-7B GI - letters defining the type of lamp: GI - generator pulse; 7 - the number of the ordinal number of the development of this type of lamp; B - a letter indicating the type of forced cooling: B - air. T- design