I have some parts selected to do testing on, and I'm going to measure them with an Agilent E4980A unit as my reference standard. This is a calibrated instrument my employer uses to do capacitor matching on some very interesting things. I've chosen a number of parts from the following: Electrolytics (dry and wet) Mica (postage stamp and dipped - however the stamps may be paper, there's no way to know.) Molded paper Wax paper Bumblebee (oil and dry) I'm not going to do any ceramic or film because some of the testers are old eye tube devices, and they don't like ceramic or film devices. I need to make some jigs here, but should have some results soon. Essentially: these are parts that I would find in the old equipment I work on. For the testers: Fnirsi tester generic M-tester generic L-C tester B&K Precision tester A couple of eye tube devices (EICO and Olson) An old compensated HP device that I don't remember the model number of and I'm too lazy to go look. I might try my ZOTEK meter as well, but those are generally chargetime meters and as such, probably aren't useful for these old things. I'm going to do a chart of all the values. I'll let you know ASAP.