Hi,
Does anyone know of the datasheet for the well known Clairtronic Mains autotransformer?
It has no part number on it, just a hand written Type number of "10555". And a hand-written serial number of "360/022006"
I believe many will know the one that i mean, as this particular one is massively common in many electronics co's that i have been to. It has a light grey paint work on its cylindrical type enclosure, with black dial on top so you can rotate it to your desired voltage.
All else it says on it is 240VAC in, 0-240VAC out, and a little split coil diagram with connections 1,3 and 5. The dial markings go from "0" to "270". From the coil diagram, its obvious that Vac input is always >= VAC output.
I am trying to find out the coil resistance. Officially. I am not allowed to take it too much apart. I took off the cover which covers the input/output lead entrance points, and measured the primary and secondary resistances with the wiper at max......so the readings should have been the same, but were not....
The primary resistance was 0.8R. However, the secondary resistance came out as 2.3R, so i am guessing the wiper is making up the deficit in resistance. Presumably this means its damaged?
Does anyone have the datasheet?