Hi, Joseph The unit number just seems to be a mechanical serial number - all you can really say about it is that higher numbers are newer. The most useful number is the 4 digit prefix on the serial number - this is an EIA format date code (two digits of year, two digits of week) - all the units I've seen have been from '03 or '04 - the newest one I have is 0420 - so dating from early June 2004. There is also another date / revision label on the main PCB (visible by removing the bottom cover) - this seems to be the PCBA build date.
Regards, Pete On Wed, Jan 11, 2012 at 9:03 AM, Joseph Gray <jg...@zianet.com> wrote: > With all the talk on the list about these things, and considering the > price, I could no longer resist temptation and ordered two from > nichegeek. > > First, I was amazed at the speed at which I received these units. The > order was placed last Friday, the shipment went out late Saturday and > I received them today (Tuesday). In my experience, it has always taken > two weeks or more to receive anything from China. I couldn't believe I > got these in just three days. > > BTW, I paid $38 each with the free shipping. An outstanding deal IMO. > I also received the semi-useless freebies. > > My only quibble so far is that both units were packed in nothing more > than a large envelope, with a thin layer of bubble wrap added. Nothing > is dented or rattling around, so hopefully they are OK. I'm just about > to wire up a cable and power them on, so I'll know soon. > > The units I got have numbers of UN 71xxx and UN 78xxx. I don't know > exactly what this means, but according to the ebay sellers, they are > claiming that 6xxxx and 7xxxx numbers indicate newer units. Can anyone > decipher this number sequence? > > Joe Gray > W5JG > > _______________________________________________ > 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.