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daryl bane
12-12-2011, 11:10 AM
I have a Microptic Autocollimator TA-3 that has the photoelectric cell and amplifier box. I am missing the power cord to the box. I do not know if this power cord goes directly to 110AC or to yet again a separate transformer. I have enclosed a pic of the unit and the back. The socket in question is the P104. Anybody who has a TA-3, TA-4 or TA-5, that has the amplifier box should have this connection. Thanks.
http://img.photobucket.com/albums/v417/brufsupbane/MyPlace029.jpg


http://img.photobucket.com/albums/v417/brufsupbane/MyPlace027.jpg

Stuart Br
12-12-2011, 11:26 AM
The power connector is a Bulgin minature rated at 3A 250V.
http://www.bulgin.co.uk/PDFs/CatNo82/CatNo82pages/Page_147_2005_Cat.pdf
They were very common on test equipment manufactured in the UK in the 1960's.
I would suspect that being UK manufactured instrument, it is most likely wired for 240V UK supply, but I can't be sure.

You may need to get the cover off and see if there are any markings on the transformer or any jumpers/taps for different voltage selection

Regards

Stuart

daryl bane
12-12-2011, 12:04 PM
Stuart, Many thanks. Another piece of the puzzle. Yes, I pulled it apart and where the leads go from the socket to the bottom board of the internal transformer, there is written 100-110v. But that may be for only one leg...sigh. It is wired red, black and green. I will foolishly assume that hooking it up to 110V will not blow it up? Is UK 50hz or 60hz? Now the hunt for a Bulgin connector here in the US.

The Artful Bodger
12-12-2011, 01:53 PM
Stuart, Many thanks. Another piece of the puzzle. Yes, I pulled it apart and where the leads go from the socket to the bottom board of the internal transformer, there is written 100-110v. But that may be for only one leg...sigh. It is wired red, black and green. I will foolishly assume that hooking it up to 110V will not blow it up? Is UK 50hz or 60hz? Now the hunt for a Bulgin connector here in the US.


A photograph of the inside may be useful. UK mains is 50Hz but that might not be important.

daryl bane
12-12-2011, 02:49 PM
Artful, excellent advice. When I get home I will take a pic of the bottom of internal transformer and post it here and see what the consensus is. I was able to order the Bulgin PX0646 connector from Mouser Elec. no problem. Stuart's info saved the day, thanks again.

Grind Hard
12-12-2011, 04:58 PM
So what does this device do?

daryl bane
12-12-2011, 05:29 PM
The box pictured is the other half of a type of auto-collimator. Simply put, a autocollimator is a telescope like device that uses reflected light beams to measure deviation of a target(mirror) along its axis. It is used to check surface plates, machine tool ways, etc. As with many types of optical devices that can trick the eye, the autocollimator designers utilized a photoelectric eye into the design that can more accurately detect the tiny alignments of the reflected beams. This box is the hardware to power the photoelectric circuitry located in the eyepiece of the autocollimator telescope(not pictured).

Grind Hard
12-12-2011, 08:21 PM
Ok thank you. Sounds like an interesting device to play with!

daryl bane
12-13-2011, 10:32 AM
Here is a pic of the board. Its looks to be self-explanatory. I think it is setup for 115V. which would work for the U.S.
http://img.photobucket.com/albums/v417/brufsupbane/MyPlace032.jpg