Lou Hart asked, By less stable, do you mean their capacitance value changes with temperature over a short time, or that they dry out, over a relatively long time? *************************************************************************** By less stable I meant...From "High Speed Digital Design" by Johnson and Graham...loosely quoted Aluminum electrolytics commonly have an initial tolerance of +/-20%... an aging factor...which amounts to +/-15% after 1,000 hours at their max rated temp...temp derating factor, about -5% at 0-degrees C...can take away 40% of the capacitance you thought you were buying...ESR ratio of 14:1 from 0 to 60-degrees C...At temps below 0-degrees C, the ESR on this particular capacitor renders it useless for digital bypassing... As always, the suitability of anything depends on its application and how it compares to the available alternatives. --- Gary D. Peterson _/_/_/ _/ _/ _/ SANDIA NATIONAL LABORATORIES _/_/_/ _/ _/_/ _/ _/ P.O. Box 5800, M/S 0503 _/_/ _/_/_/ _/ _/ _/ _/ Albuquerque, NM 87185-0503 _/_/_/_/_/_/ _/ _/ _/_/ _/ Phone: (505)844-6980 _/ _/_/ _/ _/_/_/ _/ _/ _/_/_/_/ FAX: (505)844-2925 _/ _/_/ _/ E-Mail: [log in to unmask] _/_/_/