On 3/26/2013 9:03 AM, Jim Lux wrote:
On 3/25/13 9:04 PM, Jim W7RY wrote:
Why not just rent one Steve? Then you can see what your needs are
before you buy one?
-----Original Message----- From: Steve K7AWB
Thanks to everyone for the advice in confirming a tower is straight up
vertically. I think I will buy a transit, but need advice in which one
some
of you have bought and used for this event, if any. For instance, at
Lowes.com, there are several CST/Burger ones, but it is hard to
determine
the differences between them and which ones will do the job I need to do
with it. I have no problem spending around $300 or so for a level, but I
want it to do the job. And maybe later I can use it to install a
4-square.
Look at the specs. Most of what the big box stores have will do within
an inch at either 100 or 200 feet Great fob getting buildings straight
and towers true with in an inch or two. I doubt it'd be good enough for
surveying but as they say, Good enough for who it's for" <:-))
However even when set true the laser levels and transits require viewing
the line and that light is bright enough to be dangerous.
If you were a bit closer, I'd loan you mine and you could determine if
it'd do the job. It did for me. I lei it draw a line up one leg of the
tower and use a telescope to view ii That laser is bright enough you can
view it in daylight although in bright sunlight it may take a bit of effort.
Check the tool rental places if you want a real theodolite.
73
Roger (K8RI)
Very much so.. rent one (or borrow one). or at least go try it out (I'm
not sure the tool cage at HD or Lowes is the optimum place for this)
Do you need a level, or do you want something that can measure vertical
angles (transit/theodolite). Do you want something with stadia marks
(so you cam measure distance by looking at a suitably marked rod)?
Used equipment is also available, and often a very good deal. Some time
ago, I would have said "look in the yellow pages under surveying
equipment", but these days it's a bit trickier; check online. It's very
helpful if you can go to the surveying store (as it were) and try stuff
out.
You'll also need a decent tripod (inexpensive aluminum tripods are about
$60-80). If you're doing leveling, you also probably need a rod of some
sort. If you're looking to save money, you can get what looks like a
giant tape measure with the graduations on it that you attach to a 2x4
or similar. The problem is whether your "rod support" is straight enough.
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