Looking to get some clean preamp boost out of your guitar, and love the tone that vintage tubes offer? Check out The Persuader pedal from Mod Kits DIY. The Persuader can take the tone of your guitar from nice and clean to that warm, smooth tube overdrive. Easy to construct with the solid instructions, this pedal is built with the 12AX7 tube, but if you’re looking to change up the tone, consider swapping in other tubes also available from Amplified Parts.