To all who requested tiff images of my stereo sonar, I have sent ann image of
the left receive channel.  The right channel is identical.  The transmitter is
simply connected to a couple of I/O bits from the PIC.  Also included is a 5
digit display.  The code, designed for a 16C74,  is still in a state of flux,
but if desired I would be happy to share it.

Lee Holeva