LF: DFCW

["OSBORN, Chris" <Chris.OSBORN@astrium.eads.net>]

        My new LF TX is nearly finished and I would like to add the option
of DFCW.

        I was thinking of just placing a varicap diode in parallel with the
crystal and thus pulling the frequency 
	for achieving the dots / dashes.
        
        Can someone direct me to a circuit diagram and software to achieve
this ?

        73 Chris G3XIZ