[AMRadio] Has anyone built a linear using a 6c21 or 750TH?

[AirRadio]

Has anyone built a linear using a 6C21 or 750TH, I found one of these, sadly 
heater o/c in a hamfest recently and thought it might make a great project 
if I could find a bit more about it and a working example, so if you have a 
6C21 or a 750TH in your junk box then I would be interested in making it 
into a project amp. It would go well with my BC-610, ART-13 and other 
boatanchor radios.  73 Max M0GHQ