[Amps] Testing Tubes with a Henry 2K

[Brett Sims]

I have three used 3-500Z tubes I'd like to test.  Can I safely test them one at a time in a Henry 2K?       My thought is this will allow me to better classify each tube individually and perhaps better match two of the tubes.  Providing the tubes prove useable.

Not sure it matters, but the Henry has had the HV power supply upgraded with new electrolytic caps and the rectifier tubes replaced with high voltage "potted" diodes. 

Any thoughts or comments?

Thanks  Brett  N5SQK