In general an x-ray tube is just an incandescent light bulb. It’s filament has a short lifetime. No amount of tube maintenance will prevent that. Filaments can withstand ~20,000 (Toshiba Tubes) to ~60,000 (Varian Tubes) exposure cycles (with a +/-10,000 variance). Data above based on internal testing performed at Summit Industries on Toshiba 7239 tubes…

An open filament can be caused by a number of things (from most likely to least likely): Improper connection between the HV cable and the cathode receptacle. An uncalibrated generator (leading edge mA filament starting values). A worn out filament (either a very old tube or a high capacity clinic). A tube not properly maintained…

Yes! A tube used often is not necessarily being used across its entire kV and mA range. Once the end user shoots an abnormal technique for their clinic, that’s when an arc is most likely to occur.

A tube should be seasoned weekly. The #1 reason for generator failure is due to a tube that was not maintained by the end user. At some point the end user will select a technique that is abnormal for the clinic, this will result in a tube arc. The tube arc may cause damage to…

The following are excerpts from the 08538 Quick Start Guide: X-ray Tube Installation section. Apply HV Silicone grease: Tighten ring nut using hand and 1.5mm hex key per image and video below. Stop when the ring nut flange is 3mm from the HV receptacle: How to tighten HV cable ring nut: