National never published a block diagram for the HRO-60, so we drew our own.
Click on the images to the left to see the original and our modified HRO-60 block diagrams.
Click on the images to the left to see the original and our modified HRO-60 block diagrams.
Click on any picture to enlarge it
Original HRO-60 block diagram
Modified HRO-60 block diagram