1 LuckyOne 4 months ago I've been using an old Guild-branded WEM Copicat Mk IV (the solid-state one) tape echo for a while now and it's become a big part of my sound. It's been giving me a few problems and I've decided to get it fixed as well as getting a second one for backup. The only problem is, I haven't been able to find one that was made for the U.S. market, which would run on 110vac/60htz. I went ahead and purchased a beautifully restored unit from the U.K. but as it runs on 220vac/50htz I decided to get a step up/step down transformer. My question is this? I know that the transformer can covert the power but I don't know about the 50htz/60htz. Will this effect the motor speed/speed of the echo and will it damage the unit? It's a nice unit and I don't want to destroy it. I may have to look for another US version, but since I can't find one in great shape, I went with this British one. It hasn't gotten here yet, so I haven't been able to try it but I must admit I'm a little concerned.