It seems I am unlucky. In the past I have bought several short gray plate and long blackplate rca 12ax7, telefunken and others and they always seem to be on their way out. Like yeah, the tube technically works but it's so quiet and lost most if its life. This is party my fault because I've never tried to find a reputable place that sells them and takes time to test them etc...is it just always kind of a crapshoot? Or is there a place that sells them that's dependable?