So I’ve got a Del Universal xray machine, I bought it new in 2004.  It’s actually called the Chiro model, it’s got a gantry system that helps it to perfectly maintain the alignment of the tube and bucky. ..  Okay, already too much information there.  So, anyway, the high voltage transformer part of the system, “the Box” I lke to call it, had somme issues, and I had to call out the techh to work on it.

One of the forst things he did was to unscrew the cathode and anode points on the tube, and pulled out what I can only describe as a dildo-shaped contact, covered in clear grease.  only, mine wasn’t.  The grease was dried up and the tip of the contact was slightly browning a sign of arcing in the electrode, which he told me was “not good”.  He opened up both sides and showed me, and it looked bad on both.   The tech mentioned he uses a very particular dielectric grease, from Dow Corning.  Now, a quick Google search shows there aren’t many dielectric greases from Dow Corning, so I’m going to add this link with the disclaimmer that it migh not be the right stuff.

 Dow Corning Xray lube


So if it’s not the right stuff, get it.  He said this should be changed every year, at “both ends of the wire”   yes, there are the same wires that go into your box, and they need to be pulled out and lubed.  It’ll save your machine from arcing, and you having to buy an new thousands of dollars xray unit.   You are welcome.