I have a K3/P3/9500/DB36 setup. Occasionally something sticks and the radio is deaf. If I send a DIT it clears and I can hear again. It's not the K3, it's not the cable connecting the K3 to the amp and it's not the TR relays in the amp. Have people experienced this before? What is the solution? Tnx. David. W6DR at ARRL dot NET Sent from my iPhone