Ion Trap?

[Eric H]

I would hazard a guess that someone added the extra trap because the electromagnetic one failed at some point.

Have you tried it without the extra PM trap?

If it works without the extra trap then leave it off, if it doesn't then there's a problem with the Electromagnet trap that needs to be resolved. I seem to recall it' gets it's voltage through one of the large wirewound resistors inside the Black heat sink on the back, if it's open it won't work.

You can use just a PM trap of course but it has to be a double type trap, this is about twice a thick as the single and will have a large end and a small end same as the EM trap.