You can see in the bottom left the power section and where the various voltages v+raw, v+, v++, v- and v- come from so whatever voltage you get at those flags should be the sameĮverywhere else they appear on the schematicĮ.g. It could be something else causing the fault rather than the op amp but could also be the op ampįirst thing I'd do is check the voltages on the power pin 8, ground pin 4 and input and output pins 1,2,3 and 5,6,7 The op amp shouldn't be getting hot in this schematic it's a TL072 one half used as a buffer the other an inverting amplifier There's also pcb images to see if it's the same or similar to yours If you can read a schematic there's a trace here by bajaman with his schematic ![]() "Understanding How Transistors Work" - Stompbox Studies Frank Blöhbaums breakout Thorens amp combines balanced tube drivers with ultra-power. ![]() "Everything You Need to Build a DIY Guitar Pedal" - Pedal Haven BK Butlers Tube Driver Blue circuit combines small-signal triodes and bipolar Sanken transistors with output-load mirroring circuitry whilst his Monad version loads 300B power triodes with transistor followers and backs it with a 2000000♟ power supply. ![]() "So you’re starting out - A guide to what you’ll need to build pedals." This is an open community for the do-it-yourself pedal builders of reddit! Please use this subreddit to share knowledge, give/receive help, and show off your custom builds! Looking for troubleshooting help? Please read this first!
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