burial of coax

[Stephen S. Tobe]

anyone out there have any suggestions or innovations on the 
best way to bury coax, particularly for long runs (>150 ft). 
i have used both direct burial CATV or have put standard 
hardline inside polypipe. unfortunately, the polypipe always 
ends up with water in it, whether ends are sealed or open. 
have also tried elevating the middle section so that water 
runs out either end, but this is not easy to do when burying 
polypipe (never know how much the center section is 
elevated). it is also necessary to insure that the pipe 
slopes continuously, with no level (or worse) sections.

another problem with polypipe is the entry of rodents. they 
seem to find polypipe a gud place to set up house. stuffing 
the ends with fibreglass insulation discourages this, but 
there are some determined rodents in my area!

one of the problems that i have with directly burial cable 
is that i have a lot of small stones in my soil. during the 
freeze-thaw cycle, these seem to be attracted to coax. as 
well, the cable has to be buried sufficiently deep so that 
tractors can drive over it without deforming the cable or 
denting it because of the stones around it.

altho rotator cable is less problematic, are there any 
recommendations on type of cable? Has anyone run into any 
difficulties with burial of rotator cable?

suggestions welcome! thanks.

steve VE3XO
stephen.tobe at utoronto.ca