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Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1714
Thank you for fielding* some questions addressed to me, x-ray.
I regret to report that this project has been on the back burner for almost two years. The secondary coils have never been disassembled beyond the state in picture 2, nor did I ever plan to do so. That's how they stand today, in a plastic bag to reduce the infiltration of dust and moisture.
No promises now. To reverse-engineer the secondary configuration, I would first determine the wire gauge from the measurable DC resistance, turns count, and average turn length. Then seek combinations of turns per layer and number of layers, to match the coil dimensions and have reasonable values for axial and radial pitch.
The recent discussion inspires me to move ahead, and put to use some dielectric oil generously given to me by a 4hv reader in the next county. My vacuum pot (to permanently enclose the transformer, under dried and degassed oil) and pump have long been ready. Still need to choose a design for HV and LV wires passing through the 12-mm-thick acrylic lid. Feedthroughs must be vacuum-tight, with enough wire slack (or spring contacts) that the lid can be installed after transformer is bolted in place. Maybe the LV feedthroughs will penetrate the tank's side instead of its lid. In the meantime, I came to own a complete X-ray head and its control box, which obviates the first application of this transformer.
*Some readers might not recognize that term from the game of baseball, in which the San Francisco Giants may soon win the World Series. Do cricketers also field balls?
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Reverse-engineering a small XRT
