I have recently acquired a very old oscilloscope, and had just figured it all out when it went out of focus. Adjusting the focus dial works to some extent, however when turned all of the way it brings the line into much better focus (2cm wide rather than 6) however this is still so much that it is not easy to work with. Is there a simple fix, or is this a very complicated issue?
(I would love to give a model number, however I do not know my self, all I know is that it it is very simple and basic)
Thanks