Hi I suspect you are a lot more likely to come up with a new tube by talking to Bert before he gets rid of his inventory....
Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Friday, January 14, 2011 9:10 AM To: Tom Van Baak; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] CS reservoir depletion Tom That is one thing I noticed even without the CS the system is very stable with the Xtal. My comment was tagging on to a previous one and I couldn't resist the fact that I get might old stuff. Good comment on the standard. Indeed I run my 5065 every month or so for a day or two insuring its stable and no problems have or are cropping up. My 5061 came from the Naval observatory. I just know the next hamfest or MIT flea I will find a new tube for it for $10 or 20. Not to likely. Regards On Fri, Jan 14, 2011 at 1:01 AM, Tom Van Baak <t...@leapsecond.com> wrote: > Hi Tom been quite a while hope you are well. >> The never run out comments, not from me. Look at the >> previous thread I tagged onto. My humor is that most of >> the CS tubes we get are very long in the tooth usually >> way past whatever anyone would say they are good for. >> > > That is so true. It always amazes to pick up a 30 year old > 5061A and find that it still works. Sometimes the reason is > that it is already on its 2nd or 3rd replacement tube before > it went to surplus. In which case you're happy for years. > Other times it may be that the 5061A was used only very > intermittently and the tube is the low S/N original. > > A real gem would be one that was kept in cs-off mode except > for a few hours once a month to keep the OCXO within some > loose cal lab spec. Even after decades it would be as good > as new. > > For many frequency applications there is no reason to run > in full cs-locked mode. This is also true if you need good > short-term stability. The free-running OCXO in most Cs (and > GPSDO for that matter) are more stable short-term when the > loop is open. > > > /tvb > > > _______________________________________________ > 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. _______________________________________________ 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.