CTC-9 from North Hills CA

[old_tv_nut]

Originally Posted by DaveWM

if the HV looks right, the HOT and Shunt current look correct? I like to watch the HV while oberving scene changes to see how well the regulation is taking place. I also recall reading somewhere that defects in the video amp circuit can cause excessive beam current due to bias on the CRT cahodes being incorrect resulting in overloading of the HV circuit.

If the HV and regulator are OK, but the CRT draws too much beam current, you will SEE it go out of regulation (losing focus, and picture size changes)