Hi Paul,
If you can provide links to images of your capacitors, especially the
face-plate, label, or stamped info, or if you can provide manufacturer
info and model number, there is a possibility that we can identify the
type of dielectric fluid. Was "Atomic Research" the manufacturer or
perhaps the application they came from?
As Jim Lux indicated, a large variety of capacitor dielectric fluids and
blends have been used in HV capacitors over the last half century. Many
of these fluids were proprietary and not readily available to a casual
hobbyist and others (such as PCB's) are no longer available. And some
benzine-based "aromatic" fluids were more volatile than others, so its
possible that the capacitor rolls may have partially dried out.
The easiest fix is to try adding mineral oil and resealing it. before
resealing, drawing a partial vacuum for 24 hours or so may help to
remove entrapped air inside the rolls if they've partially dried out.
Finally, if the cap is packaged in a cylindrical container, remember to
leave a small air bubble in the cap to provide room for expansion of the
capacitor rolls especially if you plan to use the cap for Tesla Coil
operation. The repaired cap should be usable, but you may need to derate
its operating voltage...
Bert
Paul McGlen wrote:
Hi All,
I recently acquired some Atomic Research Pulse Capacitors. They are 50kV
and 100nF, however, one of them was damaged and the oil has leaked out,
so
I need to replace this. Does anyone know what this oil is and where I can
get it. If not can I replace it with high voltage transformer oil?
Cheers.
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