Quote:
Originally Posted by Penthode
I think a few minor modifications to the sweep circuitry may be all that is required.
|
Like what? I already tried more drive, and removing the regulator tube completely. If I had to guess, it comes down to the flyback and how it's wound. If that's not it, there are still a few things to try. My 5N uses 5U4 vacuum tube rectifiers, swapping to solid state diodes to boost the B+ may help. I think the early CTC-7's were the last ones to use vacuum tubes for LV rectifiers, the rest had silicon. Might also try a solid state HV rectifier for more efficiency, but I hear they can cause issues like lines in the image on screen/video noise.
Quote:
|
I do not like the static convergence DC supply coming from the horizontal output cathode.
|
Not sure where else the convergence voltage could come from, you need it from the horizontal for the waveforms. Maybe a tap from the flyback would be a better choice, then the cathode could be more normal with just a resistor.