More measuring and also fired up my new Tek scope. The best part of a project is getting to acquire new tools:
- AC line voltage 123 volts
- 390v source measured 405 volts
- 275v source measured 294 volts
- Horizontal output grid 2,6 spec -46v measured -43v volts
- Horizontal output grid 2,6 spec less than 225ma. The best I could adjust for was 240ma current at 24k high voltage
- Horizontal output grid 1,7 spec 130v measured 130 volts
- Horizontal output grid 8 spec 37v measured 42 volts
- Horizontal output grid 2,6 drive. Scope setting 50v per division, 10us per division


Zeno, thanks again for your advice, the horizontal blanking amp is a 6GH8A. Other than replacing all of the electrolytic caps on this set I have not checked any parts in this circuit or other remaining circuits.