Electron tube 6F36 is indirerectly heated hf pentode. It is characterized by a very high transconductance and moderately low interelectrode capacitances which adapt it to wide band video and intermediate frequency amplifier service. These are actually by army remarked russian 6J5P tubes, for better identification. 6F36 (6J5P) pentode is a direct replacement of the american 6AH6.