Yes, another Forum member (on the Alton Towers thread) suggested that theory about the dimensions of the Ark being the same as the coffer in the King's Chamber, erroneously called a sarcophagus. If true, this can't be mere coincidence.I knew the story.
Right now I am looking for data because I do not remember well, but I had read that the internal dimensions of the king's sarcophagus in the pyramid are the external dimensions of the ark of the covenant. That is, the ark - the battery - was inserted there.
In the video provided by goggles paisano at minute 12:47 he explains that there was the aligned magnetic material that would focus the hydrogen beam.
The possibility is that the ark was, if not, the essential component that makes possible the functioning of the whole pyramidal machinery.