Re: Neil Young's Amp?
Mutron is long gone, but a basic octave divider will do the trick...
Magnatone made tube amps from the 50's to the 60's; used EL34's in larger models, had true vibrato on some, as used by Lonnie Mack, Link Wray, etc.
The Baldwin Exterminator – SS, 28" x 14" x 481/2", 100 watts RMS (250 peak), two 15", two 12", two 7" speakers, two channels; reverb (depth), tremolo (speed, intensity), volume, treble, bass, three-way Supersound switch, five-slide Supersound control. You gotta see it to believe it...