
The XRT has for its rather small size quite some iron in the core (weight 9 kg) and it also has a separate coil (in the image at the left). First of all I ploughed through the HV forum posts to see if I could find more info on this type of XRT but unfortunately without success.
It has ten cut wires, which is a few more than I expected and this puzzles me.
I hope that more experienced and more knowledgeable forum members will be so kind to answer my questions:
Most important question: will the XRT be suitable for a Fusor high voltage power supply (HVPS), or did I acquire a hi-tech doorstopper?
What purpose has the smaller coil outside the core (left of the image). Is it for heating the X-ray tube? Can it be missed or is it necessary for operating the XRT?
For my other questions I have marked the ten wires according to a color and wire thickness system. Also I did some resistance measurements between wires and core.
Input side (right side of the image):
The YG lead (yellow/green) has a resistance of 1 Ω across the core, which I suppose is therefore to be connected to ground. This makes sense considering the colour code yellow/green.
The resistance between yi1 and bi1 (yellow and blue, both combined in a yellow sleeve) measured 55.7Ω. When connected to mains (230V) this would draw just over 4 Amps. equivalent to 950W and therefore it could be the mains wire.
The second yellow and blue set of wires (yi2 and bi2) measured 1.3 Ω. It seems unlikely that these wires should be connected to mains. What are these?
Also on the input side is a single yellow wire (yi0) which appears to have an infinite resistance when measured to the other leads in the input bundle, but it measures a resistance of 80k Ω with the blue wire on top of the right big coil (Bo).
Output side (top and right of the image)
The smaller coil on the outside of the big core is connected with one yellow wire (yo1) to the big yellow wire (Yo1) that comes from the big coil, or with other words the two coils are connected in series. The resistance between these combined wires (Yo1 and yo1) and the core mass measures also 80 kΩ.
The resistance between the two wires of the smaller coil (yo1 and yo2) is 0.5 Ω.
I’m very grateful for suggestions which wires should be used for connecting the XRT into a HVPS circuit.