And the big question......where are they all now?
I can tell you where the remains of one are: in a homebrew Leslie cabinet I constructed from a 1970s-era Lowrey organ. Here's the build thread.
This isn't really an amp, so I stuck this thread here in DIY Effects. But it's not a pedal either... I rescued an ancient Lowrey organ from the trash and removed the rotating speaker baffle unit; the rest was in very sad shape as it had been stored outside for some time. As you can see from...