Hi The 260’s that I have seen from inside the USA have been pretty good (not perfect, but certainly not dead). Most of the issues have been quibbles. Phase noise not quite in spec. ADEV not quite as good as it might have been.
Everything I have seen so far from China (260 or not) has been very hit or miss. Stuff that is called “scrap for parts only” (like a pile of 10 Rb’s I have here) may turn up more working parts than something labeled “great / tested / buy now / first best great product (a direct quote)“. I have tried the “buy a few and then go back” approach. There has been little correlation between what I got the second time and what came in first. My conclusion (often stated) is that the salvage process over there is pretty brutal. Bob > On Feb 16, 2016, at 7:58 PM, [email protected] wrote: > > I just received a 5Mhz OCXO from eBay (MTI 260-0624-D OCXO). After testing it, > it is clear that it is defective. > > 1. It never heats up. > > 2. The reference voltage is zero. > > 3. Only noise is seen on the output pin. > > I tested with a 12.54V, 2A supply voltage with around 30mV noise. That should > be sufficient to test. > > All I was looking for was a 5Mhz signal whose frequency changed when the > adjustment pin was either tied to ground or the reference voltage. Never got > that far because I never go a signal at all. > > The seller packed it well and shipped it promptly. I will see how he handles > it. > > > Mike > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
