Diode, DO-35 Small Signal NPN Transistor, TO-92 | | | S1 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS)100V 0.15A standard switching diode, DO-35 2x5 pin shrouded header 2.54 mm spacing D Switch, three position, single pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8Audio Jack, 2 Poles (Mono / TS)"/> Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-142 pin Molex connector 2.54 mm spacing Pin header 2.54 mm spacing | Tayda | A-1157 or A-2425 | | S3 | 1 Consider replacing transistor through-holes with sockets or with a capacitor / resistor pair, see Fireball's hard sync to schematic, laid out PCB with exploratory 8hp layout