I have a Wouxun KG-699E and I am trying to connect it to audio connectors in a PC. Right now, I have connected it by this schematic (it uses Kenwood-type of headset connector) where instead of external Speaker and external MIC is 3,5mm TRS jacks (only Tip and Sleeve connected). The one from ext. speaker leads to MIC hole in the external soundcard and the one from ext.MIC leads to the speaker hole in the external soundcard.
I can listen to the signal received by the Wouxun, but when I engage PTT connection it starts to transmit "empty" signal (no voice, just like you hold PTT and don't say anything). Even though I know that there is signal going from soundcard (I have a jack splitter and headphones).
There is probably something I missed in the wiring, but I can't figure out what it is. Or, can I use the USB programming cable directly to broadcast/listen to frequency?