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GI-39B Tube, Russian Pulse Triode
GI-39B 150kW Pulse PowerTube
for HAM Radio use!
Factory Price is about $500
GENERAL:
Cathode: indirectly heated, oxide-coated. Envelope: metal-ceramic. Cooling: forced air or Water cooling. Height: at most 147 mm. Diameter: at most 100.2 mm. Mass: at most 1.2 kg.
This is very reliable HF-UHF coaxial tube
You can have to 1,5kW up to 1GHz CW or 128kW in pulse.
Peak anode voltage to 20kV !
Peak cathode current to 16A !
See Manufacturer Technical data: 
GI-39B is pulse version of GS-35B and GS-31B tubes is designed for radar stations.
Also nice and strong for HAM radio application:
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