🚀 go-pugleaf

I have recently become the owner of five Amperex 5868 tubes. 
These are big power tubes, I think they are triodes.  I want 
to use them to make a powerful ultrasonic cleaner but I can't
seem to find any reference to pinout or ratings.

If some kind soul could email me any info on these tubes 
(esp filament voltage, current and maximum voltage) I would
really appreciate it.

Please mail me at dpd007@atc.boeing.com as I don't often
get to this group.

Thanks in advance...