PenToad

A subminiature vacuum tube boost circuit. These little tubes are called 'pentodes' and are highly microphonic so be prepared. Original schematic was made by Frequency Central's Rick Holt and can be found on various archival forums. Its a really nice "warm" tube sounding boost and breaks up the monotony of another Valvecaster. I have another layout based around the same schematic but introduces some clipping diodes and gets pretty raunchy, appropriately called the "PenToad +".