Built on the VOX 828 topology with Dave Main modifications. An original El Diablo will cost a couple grand last I checked. Well, here ya go, you’re welcome. We are using matched sets of AC121 VI Toshiba transistors. The frequency response on these bad chickens is unreal. Correct transistor gains and leakages are essential to this circuit and we nailed it. We found the combo, It’s right in the slot, just past the click, that wonderful moment(When ya know, ya know)…

Attack:

Controls the gain of the circuit. This circuit cleans up amazing. It is recommended to dime this circuit and use that guitar volume knob you paid for.

Volume:

A standard volume control on the output of the circuit towards the next pedal in your chain or to an amplifier.

Technical Information:

• Center Negative 9VDC Only
• Vintage NOS AC121 VI Transistors
• True Bypass
• Jacks & Power Top mounted
• 4.890Lx3.050Wx2.310T
• 20mA @ 9vdc
• Hammond 1590B3 Enclosure
• 1510 Style Black Knobs
• Crimson Red/Black Graphic Plate
• Red Status LED
• Hybrid SMD/Lead PCB design