Check the listing for details. GI-7BT / GI7BT SOVIET POWER COAXIAL TRIODE TUBE NOS /RHOMBUS/OTK QTY-4. Condition: New. Listed at 120.00 USD. GI-7BT, MILITARY,TROPIC!!! LOT OF 4 Pcs. Military equipment, "OTK", high reliability. Military quality check passed (rhombus) The tubes are never used. Old stock. 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 cm Please allow for the following shipping times:EU countries: 5-8 business days, on rare occasions a few days more USA: 10-15 business days, on rare occasions more South East Asia (Japan, Singapore, S. Korea, Hong Kong, Taiwan etc) 10 business days, on rare occasions more India, China, Russia, Kazakhstan, Pakistan, Indonesia, Malaysia, Thailand, Australia, South Africa etc: at least 15 business days, but frequently around 25 business days Please note that shipping cost is calculated at average. If you have any objections please contact me for a specific quotation.I can combine shipments to save you money! Please look at my other listings!