Rapid Electronics (www.rapidelectronics.co.uk) sell the THAT 2180 VCA and 2252 level detector in ones (cheaper if you buy 10 or 25) Steve -- Whatever you Wanadoo: http://www.wanadoo.co.uk/time/ This email has been checked for most known viruses - find out more at: http://www.wanadoo.co.uk/help/id/7098.htm