The part that I don't like about "Back To The Future" is when Michael J. Fox's character, Marty McFly, plays a guitar solo during the school dance.
He performed a guitar solo on hollow-body electric guitar with passive humbuckers through a tube amp from what we knew to be the 1955. Back then, guitars did not have active pickup technology to push an amp into overdrive, there were no boost effect pedals to push a tube amp into overdrive, nor were tube amps wired to get the amount of overdrive/distortion that Marty McFly obtained. Even if he cranked the volume knobs, the gain would have been limited to the technology, so he may have gotten some clipping/very mild distortion. Example, go to a music store, plug into a Marshall tube amp. Crank up the gain. You'll get a a hard rock/metal distortion sound. Then, plug into a Fender tweed-covered tube amp (tan colored outside that looks like burlap). Crank up the gain. You hear the difference. It will be subtle, but you only hear mild clipping. That's what tube amps would have been like back in the 1950s.
He performed a guitar solo on hollow-body electric guitar with passive humbuckers through a tube amp from what we knew to be the 1955. Back then, guitars did not have active pickup technology to push an amp into overdrive, there were no boost effect pedals to push a tube amp into overdrive, nor were tube amps wired to get the amount of overdrive/distortion that Marty McFly obtained. Even if he cranked the volume knobs, the gain would have been limited to the technology, so he may have gotten some clipping/very mild distortion. Example, go to a music store, plug into a Marshall tube amp. Crank up the gain. You'll get a a hard rock/metal distortion sound. Then, plug into a Fender tweed-covered tube amp (tan colored outside that looks like burlap). Crank up the gain. You hear the difference. It will be subtle, but you only hear mild clipping. That's what tube amps would have been like back in the 1950s.