In songs like Tennessee Jed in 71?72,jerry hits a string of high notes I think what you would call a slur?and to me it sounds like a pedal steel guitar for those few notes,does any one know is he getting that from a wah pedal maybe or volume pedal or just a totally dialed in amp with mods? In a video I saw from Germany beat club in 72 ? For a split second I could see a pedal like a wah if he is using a wah pedal it must have been just pushed for high notes? If I had a wah I'd try ? Sorry for the ignorance I've been playing mostly acoustic my whole life now iam really interested in learning the nuances of electric playing and tone.thanks
Jerry used a color sound volume/wah in 1972, but otherwise it was basically guitar > fender twin, period. He also had a booster installed in the guitar (an Alembic made stratoblaster) which you can get in a pedal today. A really basic circuit.
What you might be hearing some times are pinch harmonics, a technique from Roy Buchanan that jerry started using in late 72 on tunes like Loser. No effects required, but lots of finger dexterity.