DIY Custom Tube Preamp - YouTube
A DIY valve overdrive pedal – Goldie – Dave Mac's Window on the World
Turn a Solid State Amplifier into a "Tube Amp" with a Tube Pedal?! - YouTube
Soldano Preamp | DIY Fever
DIY 12AU7 Tube Preamplifier Project | Valve amplifier, Vacuum tube, Hifi amplifier
Laval Audio - All-tube guitar/bass mini-preamp stompbox - YouTube
StompBoXed - The Guitar Pedal Builders Repository | Amplificador, Pedais de guitarra, Amplificador de áudio
DIY tube guitar overdrive PCB - fully assembled | Reverb
Sortaflex: D.I.Y. Tube Bass Preamp | T. Hallenbeck
Sortaflex: D.I.Y. Tube Bass Preamp | T. Hallenbeck
Frog Tube Preamp 2.1 Version B PCB for DIY -Alembic F2b style – FrogPedals.com
Solid State Amp/Preamp Pedal — Acorn Amplifiers | Tube Amplifiers, Boutique Amps, & Effects Pedals
A DIY valve overdrive pedal – Goldie – Dave Mac's Window on the World
diy tube preamp for guitar? | diyAudio
4S Universal Preamplifier for 12A*7 Tubes
MOD Mesa Boogie Dual Rectifier Tube Preamplifier Pedal - HiFiStor
Tube Distortion Pedal | Electronic Schematic Diagram
Soldano Preamp | DIY Fever
12AX7 Tube (valve) Preamplifier Kit
The MacGuffin - A Dumble ODS preamp with submini tubes | PedalPCB Community Forum
Alembic F-2B preamp (DIY) | Watersish.com
Sortaflex: D.I.Y. Tube Bass Preamp | T. Hallenbeck
12au7 guitar preamp – FrogPedals.com
