I love threads like this .... you (I) learn so much

richm It reads like you have forgotten MORE than I know

Still Im watching and learning - just really sorry that I cant offer any useful input other than the bleeding obvious ones like is the block earthed etc? I have access to an oscilloscope - but its annoying when people dont put their location in the profile because you could in theory be living in the same street as me

Keep at it guys

Tony