6С2С (6S2S=6J5) triode made by Vostok in 1967
<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>
2022-12-29 01:28:42
<span class="int-own-work" lang="en">Own work</span>