Isochronism---Regarding tone, small amps cranked up is the key. In '69 I was a teenager in a band with a guitarist who, like many teenage guitarists at the time, had Eric Clapton as his role model. He therefore had a burgundy Gibson SG, plugged into a Fender black face Dual Showman (nobody in San Jose had a Marshall yet). When the rest of us complained about his excessive volume, he explained that to get good tone, he had to crank up the volume knob on his Showman. Kids didn't yet know that it was over-driven tubes that made good tone, and that if you used a lower-powered amp you could get it at a lower volume. It took seeing the pics on the inside gatefold of the 2nd Band album to realize a Fender combo amp was the way to go. He soon had a black face Deluxe Reverb, which is a favorite amp of a lot of good guitarists, Evan Johns and Bill Pitcock IV being just a couple.
It was when I started hearing the original Blues and Rockabilly guitarists from the 50's that I really saw where the early R & R guitar sound came from. Paul Burlinson of The Rock 'n' Roll Trio (Johnny Burnette) is a particular favorite of mine, though it's not he on their version of "The Train Kept a Rollin". Now THAT'S great tone!
It was when I started hearing the original Blues and Rockabilly guitarists from the 50's that I really saw where the early R & R guitar sound came from. Paul Burlinson of The Rock 'n' Roll Trio (Johnny Burnette) is a particular favorite of mine, though it's not he on their version of "The Train Kept a Rollin". Now THAT'S great tone!