Some of the replies to the phase control problem
I posted on the piclist referred to a manual called:

SCR Manual including Triac and other Thyristors
by General Electric.

I have not been able to locate this manual here in the
UK as it appears to be out of print.

Does anyone know of a source for this book?

Thanks

Stephen H Alsop    email: steve@s.ssystems.easynet.co.uk
S&S Systems Ltd   www: http://easyweb.easynet.co.uk/~s.ssystems