Although I'm a keyboarder, we played this song with the band I was with in the 70's.  The guitarist used my Leslie 760 to get that effect, and it was a "common" practice at the time (as soon as someone came up with a "new sound" everyone started copying it ... a bit like the Autotune nowadays).
I also ran my Fender Rhodes thru' a Leslie sometimes, and used a lot of guitar FX boxes (Mutron etc.) with my keyboards.
 
Showing my age aren't I ...

Kev999

scook
An interesting article about Leslie cabinets mentioning "Baby Come Back" as an example of playing guitar through a Leslie http://www.theatreorgans.com/hammond/faq/mystery/mystery.html

Just because it's stated in a published article doesn't necessarily mean it's correct. The same article also claims that Alan Price used a Hammond Organ on "House of the Rising Sun", contradicting other sources that say he used a Vox Continental.

It was definitely a Vox Continental.  No Hammond could produce such a "crappy" sound ;-)  They used to tour a lot and I think they didn't wanna lug a B3 around everywhere ...

Did anyone try the preset in post #12? It comes pretty close, could come closer with more tweaking.
 
One thing that's weird about the Phaser 6 algorithm is that its rate seems much slower than what's indicated. I had to use the double-peak LFO waveform to get it to be fast enough, which affects the emulation. Top speed on the older Leslies was around 6.6 Hz, although that varied...some didn't get much past 5.5 Hz.
 
The coolest thing about the Leslie was being able to accelerate and decelerate between the two speeds....

rotor sound !
 
https://www.google.ca/sea...Fg4Bg&ved=0CEIQsAQ

390 rpm at 4/4 is 97.5 bpm.

At 97.5 bpm, a 1/16th note is of 153.85ms duration, or put another way, it *beats* at 6.50Hz.

The coolest thing about the Leslie was being able to accelerate and decelerate between the two speeds....

That's what I miss about the Maestro, too.  Some emulations attempt that to capture that inertia, but...
 
I stumbled across a guy trying this in a TC Electronic G-System.  Sounds a bit too "wow-y" for my tastes, but it's still interesting see the process dissected, including the harmonized line.  (I might've gone with C# Aeolian, though.)
 
70's Week!!!  Re-creation Theory: Baby Come Back

I think, also, we're missing that there is a definite wah sound as well as the modulation sound. It sounds to me as if there is a wah pedal or a triggered wah being sent through whatever modulation effect. It also is a very dry sound as well.

So, sure sounds like the good old UNI VIBE to me.

Hey Grundberg - did you try my Sonitus Modulator settings?

One of the Leslie Sims that haven't been mentioned is the one contained in Native Instruments B4.  You can use an instance as an insert effect to get not only the Doppler effect with the bass rotor slow down inertia and the tube amp grind.  I would hope that B4 II and Vintage Organs retained that capability.
 
I've used this as a clip plug-in on a live multi-track recording to dress up the keyboard player's organ patch (that was less than stellar).