ctc12 clone beam current

[Bill R]

I am curious about a few things.
1. where and how are you measuring the regulator current?
2 what is the actual B+Boost voltage? Should be ~1000 - 1200volts if I recall correctly.
3. Have you checked the screen grid resistors in the Horizontal output tube. I think there is a 47 ohm and 13K ohm that if they drift high at voltage cause low High voltage.
One thing that bothers me is that all the controls seem to have to be at one end of their range. This indicates a voltage problem in the B+ or Boost voltage. Possibly not enough drive from the horizontal output stage.
4. Have you checked for leaky caps in the horizontal yoke windings?
The 1.5 meg resistors in the regulator circuit are a matched pair. I would not change them to different values. Since they are 20% they are not out of spec. The key is they should be the same value. Yours are about 7% high, but they are very close to the same value.