I'm back now.

After initial successful experiments, my station seemed to go dead. Receiving but not transmitting.
Was transmitting at tiny power - seemed to be a milliwatt or so.
Finally tracked down the issue. I had changed from my 'experimental' data cable to my 'production' cable. The experimental cable was using the 1200bps pin and the production cable was using the 9600bps pin. Changed the rig (FT857 and FT897) to DIG mode rather than USB and all FB now. QRV again.

de Glenn, ZL2TLD