Thanks Andy, still plodding on with MOTs, Ducati booked in Thursday & Marlin Friday.
Off to Sheffield Tues/Wed, so struggling for time on the scope, but just been having a quick look. TR351 seems to be unwell, in that it has lower voltages across each junction measured with diode tester on the meter, and D350 looks to be full short, which can't be helping.
Evening meals about to be served, so further investigations on hold at the moment.
The ammeter, was just to try and give me a feeling at to how low a resistance was the 105v PC 128 short to earth at higher voltages. (now used in series with a 250 ohm resistor to save the PSU self protecting)
Bill