6Ж9П (6Zh9P = E180F) pentode made by Oktyabr Vinnitsa 1981
<a href="//commons.wikimedia.org/w/index.php?title=User:Retired_electrician&amp;action=edit&amp;redlink=1" class="new" title="User:Retired electrician (page does not exist)">Retired electrician</a>
2022-12-28 00:42:30
<span class="int-own-work" lang="en">Own work</span>