China Jingdao Machinery & Electronic Co., Ltd. is one of the marx generators manufacturer and marx generator dealer in China that has patents on the motors and generators design. There isn't any problem with IP protection laws when you buy our generator, motor, engines, diesel, gearmotors and other power supply and motor-driven items, even in strict regions, such as North America and Europe. Our company has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. We'll print custom logos and marx generator product documentation in your language, and provide spare parts for easily worn down components. We also can design and deliver OEM/ODM samples in one month.

The forms start with a 5 1/2" length of 3/4" OD polycarbonate tubing. The end terminals were cut from 3/4" copper water pipe (actually a bit more than 3/4" inside diameter) with a corundum cut-off wheel on a Dremel moto-tool (several worn down wheels are shown above the leftover pipe, along with a fresh wheel for comparison). I also cut a 1/4" slice out of the ring portion of each terminal (so that it could be collapsed onto the plastic tubing). All of the sharp edges on the terminals were filed off and then polished with a 3M "super fine" sanding pad. Next, I annealed the terminals by taking them to red heat with a propane torch (water pipe comes with a hard temper, I could not get the terminals to adhere to the tubes until I annealed them) and letting them air cool. The four terminals at the top left of the picture are as cut from the tubing and still have a thick burr from the tubing cutter. The next four have been filed and polished. Next, are four that have been slotted and the last four have been annealed, but not cleaned up (with the sanding pad) yet. Final assembly involves roughening the ends of the plastic tubes with a file, cleaning both the tubes and the terminals with isopropanol, coating the inside of the terminal with epoxy (90 minute pot life), using a nylon hose clamp to position the terminals on the tubes and letting them set for a day or two.

I originally tried to solder the wire to the copper terminals, but this caused the epoxy to fail. My solution was to use two pieces of adhesive backed copper foil on each terminal. A short piece of foil was placed over the stripped end of the wire and burnished onto the terminal, then the end of the wire is bent back over the foil and the larger piece of tape is burnished down over all. The wire was stripped by heating it to red heat with the propane torch (the bottom of the torch is just visible in the upper right of the photo) and then polishing off the black copper oxide with a sanding pad. After winding, the inductor was sealed in a piece of polyolefin heat-shrink tubing. Measurement of the inductors with my LCR meter showed inductances between 450 and 460 microHenrys. Here you can see part of the aluminum straps which electrically connect the capacitors to the inductors and spark gaps. For each stage of the generator, two stacks of three capacitors are connected together, giving a stage capacitance of ~1200 picoFarads. The individual gaps are adjustable from ~3/8" to ~1 1/8".