I do as of today at 11:00am.
I dont understand your comment? The 5998 and 6080 are high output tubes. The only potentially higher output tube is the 6528. The 6528 is an ultra high output tube usually used for speaker amps. The 6528 works in my Supra because of the large surface area of the chassis, more robust power supply and fan cooling. The 6528 just draws to much current and produces to much heat in the little PPX3 chassis.
I think my new amp has the 6528 in it now at siglepower and Mikhail said the soundstage is Huge The bad news is he wants to let it burn in untill next Monday. Man thats along time.