This is the Electrohome GO5801 original monochrome X-Y monitor(QUADRASCAN), and the way to distinguish it quickly from the GO5-802 is by the regulator PCB mounted in the center with the 2 capacitors standing tall in the center. The GO5-802/805 both eliminated this regulator PCB. There are other differences, but this tells the you the whole story in a glance.

What's My Monitor Big Bear's Bulletin Board Back to Parts Page