Hiwatt DR103 amps, with 4×12 and 4x15 cabs loaded with Fane speakers, Fender Precision with a maple neck (John was using Slab Precisions at the time) and Rotosound strings, treble and presence cranked. Played with pick or fingers depending on the song.
Now I realize you may not be able to run out and buy a Hiwatt rig. A Ibanez Tube Screamer will get you close for cheap, don't bother with the bass one get the one for guitar. If you want to go the tube amp route here are some "budget" solutions. Just about any 100 tube head would be a good start, Marshall, Hiwatt, Traynor, Sound City etc. Pair with a 4×12 cabinet (loaded with bass drivers Eminence are a good choice) Marshall, Peavey, Laney, Randell all come to mind, a 4x10 will also work. Oh yeah a Orange Terror Bass will do this tone in spades.
One last thing get your action set as low as possible. As John said "on the other side of the frets. Hope this helps. Here's my Entwhistle rig.
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