Original poster: "Pete Komen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <pkomen-at-zianet-dot-com> Digikey has 1N4007 diodes from several makers for about $3 or $4 /100 or $26/1000. For a 12/60, 17 in series would be minimum. Pete Komen NM, USA