Hello, Anyone have any experience of faults on these? I don't seem to be able to get the RA117 one going at all and although the RA17 is ok at at the moment it seems to make its own mind up if it's going to work consistently or not. I've tried swapping valves and tweaking the inductors but can't get a 100 kc/s output at all. Regards Don m5aky Bristol UK