Thanks for the warning. An unfortunate fact is Rubidium oscillator life is inversely proportionate to to operating temp. At 60F they will last a very long time, where above 100F they die pretty quickly. These sound like they were real old, run hot, or both. Thomas Knox
> From: [email protected] > Date: Tue, 21 Feb 2012 14:14:22 -0500 > To: [email protected] > Subject: Re: [time-nuts] ebay warning > > These guys do not know what they sell. This was a marketing ploy, I did > catch him once before and made him change his listing. All a sudden he had > used and new. Checked with him, claimed he ha d gotten some new ones bought > one, looked very used took the back off, strong discoloration a give away > but > frequency way down a sign off long operating time, because FE ships them > as close as possible and claim 5 E-11. Those of you that paid the extra for > a NEW got ripped off. > Bert Kehren > > > In a message dated 2/21/2012 1:37:59 P.M. Eastern Standard Time, > [email protected] writes: > > On Tue, Feb 21, 2012 at 9:27 AM, Bob Camp <[email protected]> wrote: > > Hi > > > > I just got a couple of FE's in from the same guy. They all lock up ok, no > > idea about how they age. One interesting thing though: > > > > All the other FE's I have seen came attached to PC boards. The ones I > just > > got were taken off the board before shipping. All other FE's I've seen > came > > in pretty close to 10 MHz on the high end of the VCXO sweep. The latest > > batch came in *much* higher (like 50 to 70 Hz high). I'm wondering if > they > > were taken off the PC board to adjust the VCXO so they would lock. > > That makes sense. If you have many FE5680s, yu test them and sell the > good ones first as you repair the failed units. > > On another list people were asking if they should buy a > "reconditioned" product from Apple. (Apple offers the same 1 year > warranty.) The majority opinion is that the "reconditioned" units > have a better record because they were bench checked here is the USA > and have better quality assurance testing than the new units get in > China. > > This may be true of the re-worked FE5680s too. A reworked unit might > have been tested for 30 minutes or so while the others only got > powered up briefly. > > We don't really know the level of testing but over all these seem to > be reputable sellers who are responsive to problems. I do avoid > sellers who claim their stuff is "new" when it can't be new. Either > their understanding of the English word "new" is poor or they are > misrepresenting the product. Either way there are others who don't > misuse the word that I can buy from. > > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > 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. _______________________________________________ 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.
