Wild T1

I haven't done a solar in almost 30 years, but when I did them it was with a new-style T1. We went a lot of miles through an assortment of National Forests with that gun.

You lucky rascal you!:-)

I am saving to pick up an older transit or theodolite in the next year or so.

Let us know how it works out.

Jimmy

I have a few old Wilds I'm not to attached too.

This instrument has "Division of Forestry" stickers on it. I don't get to keep it; it is State property. We have been the Department of Forestry (and Fire Protection) since the 1980s, at least.

I am guessing it is roughly 1970s vintage.

The bubbles are out of adjustment; that is easy to fix. I think I had it leveled. The optical plummet is out of adjustment; I could probably figure it out.

The vertical angles from both faces only add up to 359-57-48. I don't know if something is out of whack or possibly I don't know how to operate the instrument.

The horizontal angles are 00-00-00 face right and 179-59-30 face left.

It yielded N 89-40-52 E on my baseline from the Sun (4 sets) with residuals of 22", 11", 18" and 15". My bearing from Polaris using my Topcon Total Station is N 89-40-53 E so I did something right.

FLS,

What do you have? I would like to pick up something, but it is pretty low on the priority list right now, as I am trying to get a few things paid off first.

Jimmy

I'd put the T1 back in the can and get out the T2........

Yes, I will check it out next.

Did you remember to check the split bubble for the zenith angles?

no I didn't. I'm winging it here.

Where is the split bubble?

> Where is the split bubble?

You won't find one on a new-style (6" micrometer) T1, at least not any that I've seen. As far as I know, they were all built with compensators.

I just received an e-mail that indicated that.

The compensator is automatic.

There is a simple procedure to adjust the vertical circle.

we sold our old T1 to someone a few years back
i think we still have the distomat if you are interested
i know we have a distomat battery floating around

There is a bubble available for the T1-A (last model) but you have to remove it to attache the mount for an EDM (DI-1000).

I took some sun shots with my T1-A a few years ago, I couldn't see any reason to use the total station. I was thrilled when I started to use the locks and tangents screws to site the sun and points. No motors or continuous tangents, just rock solid precision hardware. I found the T1 much more pleasant to use then my TS. Sometimes old is good!

T.W.

When I first started surveying,38 years ago,my everyday transit was the Wild TI-A with the inverted image.

With the inverted image,giving line and reading stadia was interesting.

Solar observations were done with Wild T-2 or Wild T-3.

Ice

I also use the T1-A and the N2 level in the late 60's and early 70's. After a while you get use to plumbing the pole back wards and use a level rod with the numbers inverted.:-)

The engineering and manufacturing skill that went into those guns is pretty amazing. This cutaway view of a T1 with the light paths overlaid illustrates the level of ingenuity it took to produce them:

The fact that you could clamp this on a tripod and traverse through the woods all day long getting such accurate results is very impressive.

Get used to inverted image quickly. The one that threw me was an inverted Alidade with a prism so you looked down into the prism instead of directly through the eye piece. The prism, if I remember correctly reversed the image so it looked normal but left and right were reversed. Might have been the other way around, don't remember.
jud

:good:

Please send the T-0 my way. I can email you an address!