Many thanks Magician!
I can see now I was using the wrong hFE figure (amongst other things). I was using the figure of 300 as quoted in the catalogue, rather than 40 for the worst case scenario taken from the data sheet. That'll teach me 
.
Bernie
Many thanks Magician!
I can see now I was using the wrong hFE figure (amongst other things). I was using the figure of 300 as quoted in the catalogue, rather than 40 for the worst case scenario taken from the data sheet. That'll teach me .
Bernie