English: The large glass object on the left of the image is a vacuum variable capacitor which allowed tuning of the circuits of the sender to different frequencies. Because it operated in vacuum conditions the capacitor was able to withstand the extremely high voltages required.
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.