Sam, The transformer with my TS-1000 shows an input (to the computer) of 9.75V DC. Both my TS-1000 and Sinclair ZX-81 seem to be picky about TV's and the shielding of the cable. As for identifying marks, from your previous post, the only thing my TS-1000 has on it is the FCC ID# CEC8E4TS1000R1. Otherwise, there's no mention of the number you mentioned...just the sticker on the top 'Timex-Sinclair 1000'. The box and such doesn't give any indications to other identifiers either. Hope this is of some help. Jeff Jeffh(a)eleventh.com P.S. the Aquarius went out to you today UPS -- --------------------------------------------------------------------- Sent from an Amiga 3000..the computer for the creative mind! --------------------------------------------------------------------- Collector of classic home computers: Amiga 1000, Atari 800, Atari 800XL, Atari Mega-ST/2, Commodore C-128 & C128D, Commodore Plus/4, Commodore VIC-20, IBM 5155, Kayro 2X, Osbourne Executive, Radofin Aquarius, Sinclair ZX-81, TI-99/4A, Timex-Sinclair 1000, TRS-80 Color Computer-3, and a TRS-80 Model 4. Plus Atari Superpong and 2600VCS game consoles.