Davis RF sells a coax they claim can be buried. I'd consider using both
a cable rated for burial and put it in PVC pipe. In small diameters,
that white PVC pipe is nearly free.

http://www.davisrf.com/

I'd have to dig up the book, but the wireman has tips on buried coax.

Robert11 wrote:
Hello:

Can anyone offer an opinion on how well a good quality name brand coax will
"typically" last if buried ?

Not the types called "buriable", just the regular stuff.

Will probably run in a pvc conduit, but was wondering about if I didn't.

Thanks,
Bob