http://www.uoguelph.ca/~antoon/circ/morse2.htm The above is an EXCELLENT circuit for this use. Others interested in a high quality Code Practice Oscillator - and other neat stuff may want to BOOKMARK this page... http://www.uoguelph.ca/~antoon/circ/circuits.htm This page is the main page - the two Morse Code Oscillators are at the upper right hand side. 73 DR