to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Soviet electron tube, very large sizes, power 450W. Used in military radio stations in the 70s and 80s. This example was manufactured by Unitra Lamina in Poland in 1981
Pentoda nadawcza średniej mocy GU-81 (450W), rosyjska lampa, wyprodukowana w Polsce