"Can2002" can2002@nospammailDOTnet wrote in message
. ..

Drill hole through wall in study and attempt to locate cable


before you drill use a strong magnet on the end of a string dropped
down the cavity, then lift a few inches off the floor so it hangs
free. Tie it off to something large on the upper floor! - careful
exploration with a decent magnetic compass will pinpoint where it is.
Gives you the vertical line and if you want to be really finicky you
can pull it up the required amount to give you the horizontal position
too.

Had excellent results using a strong magnet from an old disk drive
through single thickness of brick doing this.

Over the years I've gone from taking out a half brick to just removing
the vertical mortar between a couple of bricks, and just an inch or so
of that. Pity that the "regs" now don't approve using the cavity as a
big cable duct ....


Barley Twist
(Please put out the cats to reply direct)