The new LOPT went in and... no difference. Both time bases seem to be running as before with a purring noise from the frame output transformer and a weak 10kc/s whistle from the LOPT. I will run back over the same steps again as I done before. I did double check all replacement caps and wired connections for any cock-ups and replaced the temporary bunch of 5 0.1 X rated caps with a single .47mfd cap. All components were checked for shorts and resistances. I will get my 'scope out and. attempt to 'scope the line drive waveform out of curiosity. Watch this space