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STD SRPP+ Headphone Amp
Project Status:
Ongoing
License: Public Domain
- 2
Description
Mosfet Shunt Regulated Push Pull Design from TubeCad converted to be used as a Headphone Amp.
OG https://www.tubecad.com/2005/February/blog0037.htm
R9 and R21 Set the Gain. 3.3X gain in the example, increase resistance to 100K for 10X. Tha pair of resistors R2, R3 and R14,15 set the Current. This run in Class A so it will be always drawing max current. Increase the pair value for more current but you will need bigger heatsinks.
Design Drawing
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | .1u | C1,C6,C7,C10,C11,C12,C13,C16,C17,C18 | ALEX POLY CAP | 10 |
| 2 | 470uF | C2,C3,C4,C5 | ALEX ELEC CAP | 4 |
| 3 | 2.2u | C8,C14 | ALEX POLY CAP | 2 |
| 4 | 2.2n | C9,C15 | ALEX POLY CAP | 2 |
| 5 | 1N4007 | D1,D2,D3,D4 | DO-35_BD2.0-L4.2-P8.20-D0.5-RD | 4 |
| 6 | LED | LED | HDR-F-2.54_1X2 | 1 |
| 7 | IRF510 | M1,M2,M3,M4 | TO-220-3_2SD526-Y | 4 |
| 8 | Out | P1 | ALEX 3 PIN | 1 |
| 9 | In | P2 | ALEX 3 PIN | 1 |
| 10 | PW | PW | ALEX 2 PIN | 1 |
| 11 | 10k | R1 | AXIAL-0.3 | 1 |
| 12 | 22k | R2,R3,R14,R15 | AXIAL-0.3 | 4 |
| 13 | 100 | R4,R12,R13,R16,R24,R25 | AXIAL-0.3 | 6 |
| 14 | 4.7k | R5,R6,R17,R18 | AXIAL-0.3 | 4 |
| 15 | 1k | R7,R19 | AXIAL-0.3 | 2 |
| 16 | 10K | R8,R20 | AXIAL-0.3 | 2 |
| 17 | 33k | R9,R21 | AXIAL-0.3 | 2 |
| 18 | 1 | R10,R11,R22,R23 | AXIAL-0.3 | 4 |
| 19 | SW1 | SW1 | ALEX 2 PIN | 1 |
| 20 | SW2 | SW2 | ALEX 2 PIN | 1 |
| 21 | L7812 | U1 | TO-220-3_L10.0-W4.5-P2.54-L | 1 |
| 22 | L7912 | U2 | TO-220-3_L10.0-W4.5-P2.54-L | 1 |
| 23 | OPA2134 | U3,U4 | DIP08 | 2 |
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