Besides the difference in layout and box caps vs greenies, the only ‘real’ difference is the transistors.
Rev A has 2N5088 and rev 2 (and rev 3) has BC550B. The silkscreen on the pcb says BC550C, but the actual transistors are BC550B.
The seemingly missing 47pF ceramic cap in rev 2 is soldered on the back of the pcb.
I remember there’s a slight difference in tone but I’d have to A-B them again to see where they differ. It was subtle though.
Rev A is on my board. Rev 2 which came with a wooden box is in my ‘collection’.
The effect is essentially 2 silicon Fuzz Faces in series.
Put it first in line and roll back your guitar’s volume control for excellent clean up.
