Top left, metal object someone called a \"large variable capacitor\" is no such thing. It's a klystron tube from a microwave oven, or perhaps a radar system. Even so, it's part of a microwave tube.
The hand set unit is kludged together with glue.
The cable connecting it is thinner than the one that Titor showed us.
Bottom left, round thingie. That's a stepper motor, probably from a disk drive system.
Bottom right, large power (AC) transformer from an old television set or radio set.
Bottom center... Dixie cup covered in aluminum foil.
There are some electrolytics in there. Not necessarily from Guitar amps, but definately electrolytics. Check the old thread about the 100 dollar reward. I posted images and explained those long ago for comparisons.