^^ This might help...http://www.trekplace.com/article10.html
... although the phaser schematic is here incorrectly attributed to "Space Seed" rather than “tribbles”. The schematic used for “Space Seed” appears to have been part of an actual airplane schematic?
Memory alpha also incorrectly attributes the phaser schematic to "Space Seed", as do several other sites! They really need to correct and update this info because it's causing a lot of confusion.