The High Swr issue was coming from a faulty rear socket on my new FT818. Even with a dummy load - 50 Ohm, I got high SWR. So I looked further to the radio, the power output was 8 to 9 watt, no chance to change the power to a low power settings, the front socket had no high swr reading, but the power issue was still there, even on HF the power was so high. Did send the 4 weeks old radio back to the shop. I hope I get a swap.
I was lucky also, no damage to the transverter and the amplifier. But at the moment no qso's on QO-100. 73 - Rudi - ON7CL