The Bumble Buzz is based on the Kay Fuzztone, which is a simplified Univox Super Fuzz. It's a collaboration between Union Tube & Transistor and Third Man Records (Jack White).
There are no knobs; just stomp and go. Raw octave fuzz....
UNION TUBE AND TRANSISTOR BUMBLE BUZZ - VERO LAYOUT
UNION TUBE AND TRANSISTOR BUMBLE BUZZ - POINT TO POINT LAYOUT
ON THE BENCH
I should have cleaned up the edges a bit - but hey... it was a quick and dirty build.
ON THE SCOPE / FFT
440hz sine wave, approx 130mv TRMS
A very distinct octave can be seen, along with a lot of high-frequency content. As you can see, the actual trace here, is almost identical to the LTspice sim shown below.
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LTSPICE
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