[throwaway11460]

Dyson spheres can be very low tech. To reiterate, it's a swarm of objects orbiting the star, not a rigid sphere.

If you have the time and raw resources, it was possible with 1960s technology.

[varjag]

It was not possible at all with 1960s technology, nor it is possible today.

[skirmish]

Are you claiming that it is not possible to put a satellite into an orbit around the Sun? Please take a look at how many times this has been done already: [1]. Now just capture Sun's energy on one and do something useful with it: part of Dyson swarm.

[1] https://en.wikipedia.org/wiki/List_of_artificial_objects_in_... .