:D The thing to remember with RR tone is that when he & the band recorded the 1st Ozzy album, Jet records invested practically nothing in the recording process, it was done on the cheap. Nobody expected the thing to do much !
It was recorded on a 16 track studio setup. This hamperd the sound rather badly as you can hear by Randys sound. He allways sounded better live than in the studio.
I thought the amp in that Youtube vid sounded pretty damn good to my ears at least.
:D 8)