"Set Square" wrote in message
...
In an earlier contribution to this discussion,
Mike wrote:

snip


I've got an old Rapitest stud/joist/pipe/cable detector, bought 10 years ago
after I detected a cable with a drill bit.
Unfortunately, I've lost the destructions, and I don't know if its still
working or not. It seems to be working fine when switched to 'metal' mode,
(i.e. it squeals and the light comes on over a cable) - in 'wood mode' even
with the sensitivity set to full, it detects nothing - put it on a
windowledge and the light stays off and the very faintest of a ticking noise
can be heard - might just change the battery

2 other questions - ;-)
1) the wall is an internal wall 2.4m long between two bedrooms, with only
the loft above. Will there definitely be studding, or am looking for
something that is not there ?
2) PP9 batteries - how come they are only ever found in devices you only use
once in a blue moon, and how come their lifespan is always bluemoon ?. I
really cant see any justification for not using AA cells

ta