The Rude Tube is a line-level, valve distortion unit based on the vintage REDD 47 microphone preamp. The designer posted the schematic, and there are currently plans to make a run of PCBs.

Features:

• Drive and bias controls
• Switch between triode, pentode, and peak filter modes
• DI input
• Switchable low-pass filter
• No negative feedback

PCBs Include:

• Relay bypass
• Separate PSU board

More Info:

• The designer’s original GroupDIY thread.
• Order PCBs on this GroupDIY thread.