the "memory" problem that g4xjp is experiencing with his atu's will become more common as atu's will become more common as atu's get older. in all cases, i have traced the problem to one of two areas.
1. problem exists on only one band. cure: replace the band select relay.
2. problem exists on all band. cure: replace the transmit/recieve relay.
a couple of additional tips:
1. if you don't have a 150 ohm dummy load don't attempptj to align swr bridge.
2. good grounding is extremely important. all mounting screws should be well snugged.
