Pyramids never were microwave lasers. They're landing sites for Ha'taks, alien starships, coincidentally also pyramid-shaped. Learn your history!
And through an error in understanding of the true pronunciation this name was transliterated as hyksos in Egyptian resources and then backformed into the Egyptian name "heqa khaseshet", a typical instance of naming a people after the ships they came in. The sign (https://en.wikipedia.org/wiki/Hyksos) clearly shows the ship and the rays coming out of it.
I believe the landers were Cheops-class warships, not the Ha'taks?
Checked the sources[0] and you seem to be right. I guess I was mislead by Teal'c.
[0] - http://stargate.wikia.com/wiki/Cheops_class_warship#Notes
Where did the stargate franchise go wrong? It seems to have grown huge, then went up in a puff of smoke almost as quickly. Was it overextended, or ran out of new ideas to work with?
KREE!
Sometime in season 1 or 6 I think. The one where Akhenaten is an alien. But not the one where the pyramids are microwave lasers.