Original poster: "Nicholas Field by way of Terry Fritz <twftesla-at-qwest-dot-net>" <nick.field-at-hvfx.co.uk> Hi All For those of you with sync RSGs I've put up a little circuit http://hot-streamer-dot-com/temp/zcs.zip for a phase locked strobe. Kudos to Colin for the idea, this is a lovely little tool. Safe Coiling Nick _______________ Nicholas Field Director, HVFX www.hvfx.co.uk