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Tube boost + overdrive running off a 9 volt battery | 9 volt battery
StompBoXed - The Guitar Pedal Builders Repository: Valvecaster - Tube
StompBoXed - The Guitar Pedal Builders Repository: Valvecaster - Tube
Chandler tube Driver schematic help | Harmony Central
beavis audio research - stompbox schematics
Guitar Effects - AMZ Mini-Booster
DIY Stompbox Boost Demo Project | Synthrotek
Used Blackstar HT-Boost Tube Boost Effect Pedal | Guitar Center