<p>A type 6П1П (English:6P1P) miniature 9-pin beam tetrode vacuum tube manufactured in former Soviet Union circa 1980s.  
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The beam forming plates have been removed.The outermost electrode is the screen grid, then inward  the control grid, and in the center is the cathode.
<a href="//commons.wikimedia.org/wiki/User:Mister_rf" title="User:Mister rf">Mister rf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>