whilst prepping for my next job, i stumbled on a way to remove the whine i was getting on the feed i was sending to my boom op on the 942 via zaxnet.
i was feeding a qrx100 with ifb board a balanced feed from the TA3 output of my 788. (wired TA3 pin 1 - minijack shield, TA3 2 - minjack tip, TA3 3 - minijack ring) and selected L-R in the ifb option menu of the QRX, and the whine disappeared, and the signal got louder. and i thought of course - it effectively makes the QRX input a balanced input, which eliminated the zaxnet whine that the jumper cable between the 788 and the qrx was picking up.
joy.