I have been working on a 7844 dual beam scope that has a beam intensity problem. The scope was working, then the power supply quit with a rapid tick. Ok I had another 7844 that has a different problem but a good power supply. Swapped the power supply, now both beams are overpowered, even at minimum intensity, power supply voltages are all in tolerance. The intensity controls do increase intensity but can't reduce the intensity below what was close to maximum before. Focus controls can adjust the focus but not enough. Readout intensity is normal.
Thoughts of where to start checking would be appreciated!
Mark
W7HPW
