Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 **Potentiometer, 9 mm or 16 mm vertical board mount OR: **Potentiometer, 16 mm vertical board mount | | J8 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | J6 | 1 | 4.7 uF | Unpolarized capacitor | | AR Path="/607F01E7.