Price per each (1pc), please CALL.

• Product:
  
  • Stereo headphone amplifier PCB.

• Circuit design:
  • Hybrid tube/MosFET (12AU7 tube and IRF510 MosFET).
  • Apply CCS (constant current source) with LM317 regulator.
  • Simple, small and compact, good sound quality.
  • Using single tube (twin-triode).
  • Supply voltage: 24 volt.

• PCB:
  
  • Dual layer thru hole fibre-glass, green solder resist, gold-plated, +2mm thickness, military spec.
  • Dimension: 9.8 x 7 cm. 

• No schematic.
• Parts List
  • 2x 47R 0.5W
  • 2x 1k 0.5W
  • 2x 220R 0.5W
  • 2x 200R 0.5W
  • 2x 10R 0.5W
  • R1L, R1R: ...
  • R2L, R2R: ...
  • R3L, R3R: ... 
  • 1x 10k SMD resistor
  • 2x L: ...
  • 2x 2.2uF
  • 2x 220uF 16V or higher
  • 2x 1000uF 25V or higher
  • 4x 100uF 16V or higher
  • 1x 100kAx2 volume potentiometer, ALPS RK097, PCB-mount
  • 3x 0.1uF
  • 1x 0.1uF SMD (on solder side)
  • 1x LED SMD
  • 2x QX: ....
  • 2x IRF510
  • 2x LM317
  • 1x 7912
  • 1x 12AU7 family
  • 1x 9-pin noval tube socket, PCB-mount
  • 1x DC plug, PCB-mount
  • 1x SPDT push switch, PCB mount
  • 2x 3.5mm mini socket, 3-pin PCB-mount
  • 5x heatsink, vertical PCB mount
  •