List, Thanks to all for their comments. Wrote: The high grade aluminum electrolytics and the tantalums will look quite different on a network analyzer as you sweep them from 100 KHz up. OK. Since these of just being used for DC PS bypassing on individual boards I think I’ll be OK with the Panasonic electrolytics. Wrote: Take a look at the Aluminum Organic Polymer Electrolytics. Available in 105 °C and 125 °C. They have very low ESRs. In the milliohms. Yowza! Excellent specs but they cost more than tantalums Wrote: bought Vishay/Sprague caps. I looked at what Mouser stocked but they don’t match the capacitance values I need. My goal when it comes to huge uF caps HP uses in their PS’s is to find a kind of common(s) denominator so I can get the +10 prices. So some of my equipment my get a higher capacity and/or voltage than the OEM version. One thing I’m not going to do is use the OEM screw terminal caps because of their price. Instead I’m going to use the snap-in style and mount them using #16 solid copper wire. I checked the HP 3586 PS schematic and the are specing 40 micro-volts ripple before the regulators. Tight! Regards, Perrier SandeenpaXXatXXyahoo.com. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.