HawkeTallweiss Some of the PTT buttons on these machines are quite stiff, requiring a significant amount of force to press, and if you release your finger slightly, it will disconnect. However, this also seems to be an advantage, as it prevents accidental activation. But some low-end models have PTT buttons that can become intermittent due to oxidation or other factors, even though they don't require much force to press; however, sometimes releasing your finger slightly can cause them to become temporarily disconnected.