You really don't want to run power and
coax in the same conduit. I just
ran a 250 foot run in my church between
2 building to extend internet and
telephone from one building to another.
Rather than using pvc conduit and
glue joints every 10 feet, we used a
300' coil of 1" ID "irrigation pipe." This
was all one piece. It was burried using
a trenching tool .... I didn't see it
done.
I had to do a little custom grinding to
fit standard plastic boxes at the ends,
but the whole thing worked real well.
We pulled 6 cat5e cables for internet
and our Partner telephone system. Each
rectangular box at the ends has 6
RJ-45 connectors us use as needed.
We're only using 3 right now, but we
have 3 extras for growth.

Billy Thompson wrote:
I just dug a trench to bury some coax cable...thinking of putting it
into 2" pvc conduit (in it will be 4 runs of cable...directv).

I'd also like to run electric to a garage at the end of the trench
(about 50'), can i run romex in the pvc with the coax? any other tips
or suggestions?