Are you sure the capacitors you learned about in 1955 were electrolytics and not Leyden jar devices? It was early in EE education and training, after all. For those NOT EE's...... http://www.alaska.net/~natnkell/leyden.htm Frank Filippone red735i@xxxxxxxxxxxxx BTW, Oregon State (Corvallis) 1955-1959, EE. Brooks Institute of Photography 1959-1961, commercial photography. Jim ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.