Snarfling through schematics tonight just for fun (note to self: get a life) I noticed how crazy complex the more unique Brown/Blonde era trems are, specifically the Bandmaster/Pro/Showman/Super/Twin/Vibrosonic circuits that have the 'harmonic tremolo'. Not all the brown/blonde trems used this type, Deluxe/Tremolux/Vibrolux/Vibroverb are simple conventional bias-modulating concepts. I dig that these are highly regarded and famous in their own little circle, but does anybody have a good tech breakdown on the circuit? I've stared for a few minutes at them and some sections are obvious (start with an oscillator...) but don't get the whole picture yet. Any web pages or previous threads explaining the theory here? Also out of curiosity, how many boutiques are using this kind of circuit these days? Bias trem kicks ass on a bug-driven trem, and this is supposed to be even better... Clearly back in the day it was too expensive to justify (as many components in the trem than in the whole rest of the preamp...) but today component variable cost would hardly be any hurdle.