djstumerch
New Member
I have recently bread boarded this filter schematic that I had made from adapting one of R.A Penfolds circuits (see pic attached), unfortunately I couldn't seem to get it working, after speaking with a technician at uni and analyzing the output with an oscilloscope I was told that the bias created from the 3k9 resistor that links pin 3 of the LM13700N to the positive rail wasn't high enough. Also the range of the cut-off seemed to be quite small and when the LFO was sidechained the signal would begin to clip. Finally the output of the circuit was very inconsistent. I' m not really sure if there is any easy way round these problems, any suggestions would be appreciated.
Thanks
Thanks