Can someone point me to a simple circuit roughly equivalent to the network in a WE 500 or 302 telset, which I could implement with bipolar transistors (not ICs)? It doesn't need to have line-length compensation, just hybrid/sidetone function.
I am trying to avoid using telset IC for very simple requirement where I don't need dtmf and ringer functions. Could be either carbon, dynamic or electric mic in handset. Thanks for all help. Jeffrey Race
