Lowes, Home Depot, your local electrical supply house, etc.
They all carry it in lots of sizes.
Whatever you do, get larger diameter than you think you will need.
There are _always_ more things you will need to run in it than you
possibly thought when you started and leave a pull rope in it so things
will be easy when you need to add a cable for the next new idea.
> ...fiber line from house to ham shack/antenna controller.
> Source suggestions welcome,
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