zap the anode end with the oudin, the big choke will take care of any danger to your PSU.
In my experience,. The cathode end, right at the first heat sink, is more likely to start it. , The cathode transformer is a even bigger choke. This protects the high side FETS in a pure switcher, like Omni or JDSU, better.
Remember, all you are trying to do is to initiate the cathode emission spot during startup.
Steve