Original poster: "Mike Harrison by way of Terry Fritz <teslalist-at-qwest-dot-net>" <mike-at-whitewing.co.uk> Following on from the recent thread on Marxgens - I've just finished my new one : http://www.electricstuff.co.uk/marxthree.html 20 stages, 2.2nf per stage, 25KV in, 25" sparks (all from a single monitor flyback transformer!)