47/73 Classic

1973 Ram's Head Big Muff Pi variant named not for the year 1947 but for the heavy use of '47' value components throughout the circuit: 470pF, 0.047uF, 0.47uF, and 0.0047uF capacitors plus 470k resistors. Uses 4 vintage BC209 transistors per pedal—UFO-style black-top, gold-leg mil-spec units.

Volume, Tone, and Sustain controls. Lots of fuzz, lots of mid-scoop, and tons of low end. Not quiet or refined—rumbling lows and impolite gain that works especially well for bass and blown-out guitar tones.

Limited production run due to the 4 BC209 transistors per pedal requirement from finite NOS stock. Appeals to Gilmour-tone seekers and bass players wanting a less-tight, more chaotic Muff sound. A specific 1973 Ram's Head variant with unusual component values despite looking identical to other Ram's Heads externally. True hardwire bypass.