Electrodes and tips

I bought some tips and electrodes off of Amazon the tips work just fine but today I changed the electrode and it will not fire. Am I doing something wrong or do just have the wrong ones.

post a pic of the original and new consumables. Also, what cutter and torch?

I’ve boughten electrodes off Amazon before for my spectrum 375 Miller and had the exact same results.
Some were a little short so they weren’t making proper contact and some had no real hafnium emitter at all.

Some of those Amazon electrodes are just meant to look like electrodes.

Get @mechanic416 to set you up proper