A DIY valve overdrive pedal – Goldie – Dave Mac's Window on the World
Tube Works 901 Real Tube 1987 - 1997 | Reverb
The Valve Caster 2.0: Tube Boost and Overdrive : 7 Steps (with Pictures) - Instructables
TC Electronic Tube Pilot Overdrive Pedal | Sweetwater
Maxon TOD-9 True Tube Overdrive Effects Pedal | Music & Arts
Amazon.com: Guitar Mini Effects Pedal Over Drive - Warm and Natural Tube Overdrive Effect Sound Processor Portable Accessory for Guitar and Bass, Exclude Power Adapter Green - FOD3 : Musical Instruments
The Button Tube Overdrive Pedal | TubeDepot.com
Dark Matter Tuber Overdrive Pedal | Saturnworks Pedals