Hello >> a) One of the mixers (Did you use it in a thunderstorm ?) No thunderstorm the night it went deaf, but there might have some static charges on the antennas anyway. My PCR is now sendt to the repair shop, now I wait and see what they find out. Thank's to everybody for there help and advices. Byt the way, any way to protect the PCR1K against stactics ???? Regards Max