There seems to be a dearth (read no) information about this beastie that I can find. Does anyone know where I might find more about it? I have read the EU characterisation of this against the ESC-1 and Fluke 723A. Previous owner modified it to run from an external (probably switching) 28V power supply rather than batteries (18 U2 batteries no less! - D cells to those on the other side of the pond), does anyone have thoughts on this? Should I convert it back (easy enough) or maybe use a couple of external 12V SLAs to keep it fed? Cheers Dave