Testing the capacitors in a Mountain Breeze ioniser.

Having recently discovered the interesting failure mode of metallised film capacitors, where the metallisation layer can gradually erode electrically over time, I thought it would be interesting to test the capacitors in a typical Mountain Breeze ioniser to see if their capacitance value had changed.
The good news is that they all tested fine at 10nF. So the traditional Mountain Breeze ionisers will just keep going.
While I had the ioniser open I also replaced the notorious blue neon indicator with a new orange neon one with two 220K resistors in series for an ultra long life. I also resoldered the needles so that they were protruding about 6mm (0.25") in front of the unit. That allows better airflow around them and makes them much easier to clean.