If you do route the slicer audio back to the radio, don't forget to remove the diode load shorting link, else you'll get slicer + radio. But you knew that, Dave > -----Original Message----- > From: Roy Morgan [mailto:roy.morgan at nist.gov] > > external amplifier and speaker for that. OR: you can run the > audio back to > the diode load terminals on the R-390A.