I have a 7 1/2 mesh dish.
I got 600 lb dry weight concrete there.
3 foot deep.
On one side I squared the pole with a hammer and drilled big holes in it, this will prevent the pole from turning and will have a solid bond with the concrete-base.
When I set the pole I leveled it and I used 2x4's to hold it in place. Then I filled the post with concrete and filled the hole with concrete. Rechecked with an level again.
Where I live we get high wind gusts and so far it is tracking the arc perfect.
I read that it should be 1 bag of ready-mix per 1 foot of dish.
I read posts from our Canadian neighbors all the way up north.
They pour the concrete only a few feet deep and set threaded rods.
On the pole the weld a base to it with holes drilled the same dimensions as used with the rods.
They use nuts on the rod and set the pole/base on it and some more nuts on top of the pole/base.
If the freezing ground should shift the concrete base, all the have to do, level the pole/base adjusting the nuts up or down.
This will take only a few minutes and they are ready to watch TV again.