In a message dated 1/27/06 3:17:23 AM GMT Standard Time, kartooo at netzero.net writes: > i heard somtimes delays the relay time and will burn up the amps pre-amp. I've had a Mirage B1016 amp for 20 years and have always operated it with RF sensing, with a variety of exciters. The internal preamp has never had a problem. 73, Ray W2RS