How to Make a Negative Ion air ionizer

Step 9: The HV pin grid

Once the cap/diode array is glued in place, then the HV pins can be placed and mounted. I used pieces of the ega tube trunking hot glued and drilled for a small cable tie. Then the fan/grid assembly is spaced (1cm) from the pin tips, and the trunking is sawed off to size.
I also drilled the end caps to make them removable, 4 self tappers is all they need.