This is a trivial little subcircuit that taps into the left channel Line Out feed from the PC to provide sound output to earphones or an external audio amplifier.  The sound being provided is the sound card's output when the rig is in RX mode.


Phones Circuit Schematic

Bill of Materials

Designation Value Type Orientation
C01 10uF/16 VDC Electrolytic East-West
Q01 BS170 FET TO 92
R01 22.1, 1/4 W, 1% East-West
R02 22.1, 1/4 W, 1% South-North

Build Notes

Phones Circuit Topside

  • First mount Q1
  • Then mount the remaining components.


No tests here.