Jerry, What reference and measurement system are you using to determine the frequency values you are quoting ?
Bill....WB6BNQ Jerry wrote: > Just a word of caution to possible buyers of the Chinese Rubidium > FE-5680A boxes. > There has been a lot a discussion on the list lately about using the > popular FE-5680A as a portable frequency standard and I have being > working on using one of the cheap FE-5680A boxes myself. I have found > that many of them do not output a useful 10 MHz signal. The 10 MHz > output is not close to the expected frequency tolerance. The first of > the units that I received puts out a signal at 9,999,945 Hz. The > vendor then sent a second unit which puts out a signal at 10,000,025 > Hz. The vendor is in China and while he has been willing to work with > me by sending a second unit with me paying only postage, the time > delay in shipping from China and the cost of postage is prohibitive. > What concerns me the most is that the vendor says that both units were > tested before shipping. In reviewing the Internet I found several > other reports of similar problems with FE-5680A units. The units that > I have been working with are FEI FE-5680AFEI P/N 217400-30352-1. > These units all require a 5 volt input in addition to the 15 to 18 vdc > input and these units are not programmable via an RS-232 port. These > units are being advertised by several vendors on E-bay. I am sure > that there are good FEI units available but there is no way of telling > which are good and which are bad until you get the unit and check it > out and if it is bad you may just be stuck with it, Only my > experience yours, may be different > Jerry > > _______________________________________________ > 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. _______________________________________________ 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.