Hi I noticed a HP 5061A in Australia with a patek-philippe clock movement on ebay. The clock will be worth some thing, even if the tube is bad! May compensate for the risk you take. Bert Kehren In a message dated 7/13/2010 12:19:58 P.M. Eastern Daylight Time, lists@rtty.us writes: Hi It's quite possible that they have been re-tubed three or four times already. That makes the estimation process pretty tough. Pay for them as if they were dead, feel good if you get a working one. Don't feel bad if you get out-bid... There are indeed things that a Cs can do that a GPS locked Rb can not. Running a Cs 24 hours a day 365 days a year for years and years can be pretty expensive. A lot depends on what you want (or need) to do with it. Bob -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of swingbyte Sent: Tuesday, July 13, 2010 10:46 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Chances of 5061 and 5062 still having life in them? Hi Guys, In Australia some Ce units have hit the surplus market. looks like they are from the 70s - that's 40 years old now. What does the group think the probability of the tubes having any Ce left in them and still working? Is it worth it now when one can use gps clocks to lock say an Rb? Thanks for your thoughts Tim _______________________________________________ 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.