Hello i built voltage multiplier-cockroft walton type.
I connected secondary-12volt side to relay oscilator and primary-230v to multiplier.
It works or some time, but then it starts producing small sparks.
At start it can produce 6mm, but now very little.
The capacitors are rated for 1kV, and diodes are BY133-1.3kV diodes.
Could capacitors go bad?
And they are polyester film caps.