Differential Day of Depletion

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Gonna try to build this and perhaps have some fundamental principles become aware 

Here we go (shamelessly plagiarised)

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We're off to a good start

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Which means things should go downhill quickly 

Why go downhill when you can jump 🦘 off a cliff ?  So here goes

-im guessing that ok yes it's gonna be a differential amplifier so it seems kind of silly (to me) to input signal to one side then (maybe) input on the other side and (possibly) see it inverted

Which is cool I presume when you are trying to amplify a difference to monitor two different signals but why have a differential amplifier in something like a guitar amplifier where there is ONE signal

Idk maybe they compare different stages to keep them in line it's probably complicated 


Hmm time to look at some amplifier schematics that employ such configurations