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Russian power triode GS-35B (ГC-35Б) with maximum anode dissipation of 1,5 kW. These tubes are well known in the DIY world and used in many projects. As you can see from the gallery it has a copper heat sink for forced air cooling. Heat sink is removable and if you remove it, you will get the GS-35A version of the tube, for another type of cooling. Longer time stored item, unused and in original . The heater cap, which is made from a really soft metal has been partially dented during the testing procedure, but that is just an cosmetic matter, tube is tested and working. Pictures of the actual tube are in the gallery. Year of production: 1979.