Sound Card Interface for KENWOOD TS-850s

Part list
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Resistors
R1 = 560 ohm
R2 = 5K variable

Capacitor
C1 = 1.0uf @25vdc

Transformer
T1&T2 600/600 ohm

OptoCoupler
IC1 = 4N33 or 4N37

Very soon i will upload circuit with USB connection