i'm guessing you're referring to the tremolo on Take Good Care of It in particular.
the album is from '92-'93 so the tremolo you hear would be from most likely the built-in effects of one of a few (6?) late 60's Vox guitars. It's one of a very few products back then that make that specific sound. So J/whomever was controlling the tremolo rate via the rate knob on the guitar by hand. It's also panning, so it's going through a panneur of some sort though listening to it, it sounds like an overdub or else it was "hand-panned" on the recording consule as the panning isn't even.
Expensive route: need either an old Vox Ultrasonic, Starstream, Cheetah etc with working electronics. Those guitars now usually go for $1500-$3500.
Basically you need a tremolo with a cv input that controls rate if you don't want to do it by hand. but they are fairly hard to search out actually. not many people seem to make them with cv inputs. And you need that Vox repeat sound which actually many places have started making recently. I don't know if anyone has started making a repeat with a function sorta like the Spin Cycle effect on the FM4 which is like two wah pedals at opposite positions that speed up and slow down according to how hard you hit the strings (fast) and let it resonate (slows down). The effect sounds like a trippy tremolo. Now if someone combined a nice array of usable tremolos to work in a similar fashion, that'd be a million dollar idea and solve yours and many people's problem.
If you want pan, you need a panneur. and two amps if live. But something like the Boss PN2 isn't gonna give you that tremolo sound.
You can get a repeat tremolo and a Third Hand:
I have a pedal that does panning, has 6 tremolo waves (a square wave can get closish, but not quite close enough to a vox repeater), is analog and tap-tempo (fancy) and has a cv jack for rate control and all sorts of madness that i've never play around much with yet. But that Spacemen3/Spiritualized sound comes from the repeaters only not much substitute for that. And there are a lot of people making clones with better parts and more bells and whistles these days. Ronsound, catalinbread, someone else too who was that... anyway i've seen that a bunch of places have been making this effect recently. I have a ronsound one and an old 60's Walco Sound-Go-Round. Think Vox, Walco and Jen were the only ones who made this effect all back in the 60's until ronsound started making a version a few years back.
