Electron tube RC5B Tesla is undirectly heated triode with 5W anode dissipation, originally designed for oscillators in decimetric wavelength. This tube may be used in different DIY projects and in this state of preservation it is interesting also for the collectors. It is direct replacement for the RD12Ta tube. New in box tubes. Some of the pins do have oxidation marks (please see the gallery). Overall in very nice conditon and with complete original printings. Manufactured in the middle of the 60's by Tesla factory.