I have a version 3 that I tried the diode in series with R52.? It created a problem where the receiver would stay on long enough that there would be a loud screech or feedback with a microphone upon change to transmit from receive.? Evidently the diode prevents the capacitor from charging the TX line but with the diode in place the capacitor keeps the receive audio powered at the same time the transmitter is powered up.
Anyone else find this?
