3-ch Power Amplifier PCB BOM
| Reference(s) | Qty | Description | Footprint | Example |
|---|---|---|---|---|
| C1 | 3 | Input blocking film capacitor, 4.7 uF 50V | C_Rect_L7.2mm_W7.2mm_P5.00mm | MKS2B044701K00MSSD |
| C3, C5, C10, C11 | 12 | Decoupling aluminum electrolytic capacitor, 100uF 63V | CP_Radial_D8.0mm_P3.50mm | 63ZLH100MEFC8X16 |
| C12* | 1 | Turn-on delay aluminum electrolytic capacitor, 47uF 50V | CP_Radial_D6.3mm_P2.50mm | UVK1H470MED1TD |
| C13* | 1 | Turn-off delay aluminum electrolytic capacitor, 1uF 50V | CP_Radial_D5.0mm_P2.00mm | UVZ1H010MDD1TA |
| C14* | 1 | DC-detecting film capacitor, 33nF 50V | C_Rect_L7.2mm_W2.5mm_P5.00mm | R82EC2330JA50J |
| C15* | 1 | DC-detecting film capacitor, 330nF 50V | C_Rect_L7.2mm_W4.5mm_P5.00mm | R82DC3330DQ60K |
| C16* | 1 | DC-detecting Bi-Polar aluminum electrolytic capacitor, 22uF 50V | CP_Radial_D8.0mm_P3.50mm | UVP1H220MPD1TA |
| Q3, Q6 | 6 | BD140 BJT PNP | TO-126-3 | BD14010STU |
| Q4 | 3 | BC546 BJT NPN | TO-92_Inline | BC546B |
| Q5 | 3 | BD139 BJT NPN | TO-126-3 | BD13910S |
| Q7 | 3 | MJL4302 BJT 15A 350V PNP | TO-264-3_Horizontal_TabDown | MJL4302AG |
| Q8 | 3 | MJL4281 BJT 15A 350V NPN | TO-264-3_Horizontal_TabDown | MJL4281AG |
| Q12,Q13* | 6 | IRF540N MOSFET 100V 33A 44mOhm 47.3nC | TO-220-3 | IRF540NPBF |
| R14, R15 | 6 | Wirewound resistors, 5W 0.33Ohm | R_Radial_Power_L13.0mm_W9.0mm_P5.00mm | TWW5JR33E |
| RV1 | 3** | Bias setting multiturn potentiometer, 2kOhm | 3296W_Vertical | 3296W-1-202 |
| 9 | Terminal P5.08 | Keystone_1287 | 1287-ST*** | |
| 3**** | Headers P2.54 | PinSocket_1x30_P2.54mm_Vertical | 76308-210LF |
* This components are part of the protection circuit and could be omitted if one's not utilized
** You can use the same pot to set quiescent current for all three channels, replacing it with a resistor after the required value has been established.
*** Work with these and these spade terminals
**** You can use 2 10-pin sockets in the corners, or omit them all together and solder the pre-amp PCB directly in.