Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-qwest-dot-net>" <herwig.roscher-at-gmx.de> J. B. Weazle McCreath wrote: >You would then have a true voltage doubler circuit, as is shown in any electronics handbook. Weazle, The circuit under discussion AKA level shifter produces ac. Opposite to true voltage doublers which produce dc. Safe coiling to you. Herwig