Pris 300 kr.
Input and output audio signals from the radio to the computer and vice-versa supplied through 1:1 bi-directional audio transformers for proper isolation of the circuit. Positive and fully automatic PTT control is supplied from the computer to the radio from USB port through the circuit based on the Prolific PL-2303TA USB to Serial Bridge Controller and the optocoupler for proper optical isolation between your computer and the radio.
PTT control uses RTS line in the virtual COM port created after driver installation. PTT line provides +5 VDC by virtue of a corresponding voltage stabilizer implemented into the USB to Serial Bridge Controller circuit.