Mod Bench Special: People have really been digging the Motorola RT193 transistors in this circuit so we whipped up a Fat Fuzz Factory (Vexter) one-off. The Motorola RT193 is a vintage silicon transistor in TO-5 metal can format that was used in field communication systems during military operations. It also happens to make a really good fuzz pedal. One of our employees was noted remarking, "It dooms!" Yes, it does. An ideal tone-crafting tool for those engaged in Amplifier Worship and sludgy riffs. in our @reverb shop.