Subject: Step recovery diodes for Rubidium standards Hi, I remember this question from a few years back and I'm working on a multiplier for experiments on a very old Rubidium package. (Varian) Did some looking at my pile of junked Rubidiums and found some info. The old General Technologies 304A uses an HP 5082-0151 The Efratoms that I have use the HP 5082-0833 The Tracor 304B ad 308A use the HP 5082-0151 Did not want to pull the diode from my spare cell unit but I would think that either of those would work as a 5065A replacement. Cheers, Corby