DMH-Transistor-VCA
DeMarco
Classic transistor based VCA module design
Components (16)
| Reference | Value | Description |
|---|---|---|
| Q1-Q4 | BC548 | 0.1A Ic, 30V Vce, Small Signal NPN Transistor, TO-92 |
| U1,U2 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 |
| C1,C2 | 47uF | Polarized capacitor |
| C3-C8 | 100nF | Unpolarized capacitor |
| D1 | SB140+ | 40V 1A Schottky Barrier Rectifier Diode, DO-41 |
| D2 | SB140- | 40V 1A Schottky Barrier Rectifier Diode, DO-41 |
| J1-J8 | TS_Jack_6.35mm_Sw | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling), 6.35mm, 1/4inch |
| J50,J60 | Conn_01x08 | Generic connector, single row, 01x08, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J100,J200 | IDC_02x05 | IDC jack, 2x5 pins, row a carries same signals as row b. |
| R1,R4,R24,R32 | 33k | Resistor, US symbol |
| R3,R6-R8,R11,R12,R18,R19,R25,R28,R31,R33,R34,R38,R41,R42,RV1-RV8 | 100k | Potentiometer, US symbol,Resistor, US symbol,Trim-potentiometer, US symbol |
| R9,R16,R17,R26,R30,R39 | 10k | Resistor, US symbol |
| R10,R13,R35,R36 | 100R | Resistor, US symbol |
| R14,R15,R21-R23,R40 | 20k | Resistor, US symbol |
| R20,R29 | 1k | Resistor, US symbol |
| RV9-RV12 | 50k | Trim-potentiometer, US symbol |