Your amperage looks good, I do think you need to recharge it, or replace it it with a new RECI tube, if you have an access to helium gas it`s so easy to refill it, I tried it once but helium gas on our country is so expensive that it`s cheaper to order another new tube, the nice thing about refilling is that you can actually custom mix the gases and you can tune it for optimum power specially if you had an amp meter already.