3NP4 testing?

[miniman82]

This one is NIB, no phosphor burn at all. Dag is perfect, so I assume it's new. I only ask because I have no real use for it and would like to sell it, but I got burned in the past with a 5TP4 that supposedly worked for 'a few seconds' then went bad. That tube I was able to test before I shipped it and it had great emissions, so I don't know what happened there. Had to issue a partial refund on it, so avoiding that situation would be great.