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The MERCURY™ Tube Fuzz is constructed from a space-grade dual triode tube and NOS point - contact crystal diodes.
There’s a lot of glass in this pedal!
Here’s how it works. First, the two triode tube stages add second order even harmonics to the guitar signal, generating asymmetrical distortion. Next, crystal diodes clip the guitar signal symmetrically to add upper-order odd harmonics. The even harmonics warm up the tone, so it becomes fuller, and the odd harmonics add a dash of fire and fizz.
This unique blend of vacuum tube and solid-state technology means the MERCURY™ is more dynamic, responsive and versatile than an ordinary transistorized fuzz pedal. It can smoothly transition from full-bodied, Gilmourish overdrive to devastating distortion with a just the twist of the “FUZZ” knob. It’s like a tube amp being pushed beyond it’s limits and into meltdown.
At full throttle the fuzz is immense. The MERCURY™ generates endless amounts of smooth, liquid sustain where notes stretch into infinity.
At lower settings the fuzz cleans up nicely to produce natural sounding (real!) tube dirt and overdrive. The guitar retains detail with unprecedented clarity and string-to-string definition. An incredibly simple, yet versatile pedal.
Fuzz Flexibility: Stacks of fuzz sounds from a warm warm, tubey drive to devastating over-the-top distortion.
“BIAS” Switch: “Center”, “Hot” or “Cold” bias the second tube stage to alter the feel and sensitivity of the fuzz.
Vintage Crystal Diodes: A unique crystal diode matrix replicates the “voltage drop” of a selenium rectifier for more dynamic range and a rich, complex tone.
John Glenn was the first American astronaut to orbit the Earth in 1962, putting America ahead of the Russia in the space race. The MERCURY fuzz pedal is named after the space vehicle, or capsule, in which he made three orbits of the Earth. Our tribute to Glenn’s staggering achievement and all those involved at NASA.
Note: Due to the limited availability of high quality NOS tubes - This is a limited edition pedal!
SPECIFICATIONS ARE BELOW THE PHOTO GALLERY












All Tube: 100% pure analog, vacuum tube signal path operating at amp plate voltages.
Fitted with a vintage tube: Each MERCURY™ fuzz pedal is fitted with a hand-selected NOS Sylvania 6948 pencil tube.
Thermionic!: Based on a N.O.S. space-grade mil-spec subminiature triode vacuum tube.
True Bypass Switching: With Effectrode’s unique “anti-pop” footswitching circuitry utilizing a sealed, gold-contact relay.
Input impedance: Greater than 1MΩ. Output impedance: Less than 40KΩ.
Controls: Fuzz and Volume.
Features: ‘Hot’/‘cold’ bias switch.
Fuzz Flexibility: Stacks of fuzz sounds from a warm warm, tubey drive to devastating over-the-top distortion.
Vintage Crystal Diodes: A unique crystal diode matrix replicates the “voltage drop” of a selenium rectifier for more dynamic range and a rich, complex tone.
“Dakaware” Knobs: Bakelite Dakaware Chicago 1510 knobs custom manufactured for Effectrode in the U.S.A using the original 1940s molds.
Construction: Solid die-cast aluminum box.
Finish: Tough Mustard powder coat.
Includes a 12VDC 1.5A Wall-Wart
High quality low-noise switched mode power supply operating from 100-240VAC mains input.
Power requirements: 12VDC @ 600mA.
Center Positive 2.1mm barrel connector.
Supplied with various adapter plugs to facilitate connection to mains outlets in other countries. Compatible with all Effectrode pedals.
Width 4.75"; Depth 3.75"
Weight: 12oz
Effectrode Thermionic
warrants your pedal to be free from defects in material and workmanship for a period of five years from the original date of purchase.
The tubes, pots, footswitch and power supply are warrantied for a period of ninety days from the original date of purchase.
Feel free to be as specific as you like in your inquiry, or you can wait until we respond.