Corby, AT what point would be approp to call symmetricom and complain about defective tube?I still have 2 years on the 5 yr warranty left, but how do u explain this (defect),,(I assume it will just keep rising and eventually ruin the tube within a few yrs?)last I checked they wanted about 28k for a new tube. the unit with high perf tube has 5 yr warr from date of manuf. and cost 59k new. ---------------------- Original Message: --------------------- From: Corby Dawson <cdelect@juno.com> To: time-nuts@febo.com Subject: [time-nuts] Cesium tube ion pumps Date: Wed, 3 Dec 2008 22:11:16 +0000 > David, > > The long storage is not the cause. Extended operation of the ion pump > causes the "whiskers" to grow. They can give rise to field emission > leakage currents. > > This manifests as a raised ion pump current but does not inhibit proper > operation unless the current gets too high. > > I don't remember at what current a 5071A will shut down at but I can take > a look in the manual. > > Corby > ____________________________________________________________ > Click here for free information on how to reduce your debt by filing for > bankruptcy. > http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw22U6KSiqbzGnzo8ijTIrFXhPWyQU8E > VhPuk3kNAOgi96JqR/ > _______________________________________________ > 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.

In message: <120320082327.11382.493715F0000939D600002C76219791299503010CD2079C080C03BF9C9B020A030A9C9A030E0A0C0E@mchsi.com> aceamusements@mchsi.com writes: : Corby, : : AT what point would be approp to call symmetricom and complain about defective : tube?I still have 2 years on the 5 yr warranty left, but how do u explain this : (defect),,(I assume it will just keep rising and eventually ruin the tube within : a few yrs?)last I checked they wanted about 28k for a new tube. : : the unit with high perf tube has 5 yr warr from date of manuf. and cost 59k new. You should call them and find what their replacement policy for tubes is. They might not define it as defective now, but can tell you when they will define it as such... Warner

David, It would seem to me that while you have a warranty it would be prudent to exercise such a warranty. Otherwise, you will be fooling around till the last minute and be out of luck. If it sat "off" for three years and you have only had it operating for a short while, unless I misunderstand something, it seems that there may have been a problem with tube from the start ? Out of curiousity, perhaps Corby can enlighten us on that aspect ? Bill....WB6BNQ aceamusements@mchsi.com wrote: > Corby, > > AT what point would be approp to call symmetricom and complain about defective > tube?I still have 2 years on the 5 yr warranty left, but how do u explain this > (defect),,(I assume it will just keep rising and eventually ruin the tube within > a few yrs?)last I checked they wanted about 28k for a new tube. > > the unit with high perf tube has 5 yr warr from date of manuf. and cost 59k new. > > ---------------------- Original Message: --------------------- > From: Corby Dawson <cdelect@juno.com> > To: time-nuts@febo.com > Subject: [time-nuts] Cesium tube ion pumps > Date: Wed, 3 Dec 2008 22:11:16 +0000 > > > David, > > > > The long storage is not the cause. Extended operation of the ion pump > > causes the "whiskers" to grow. They can give rise to field emission > > leakage currents. > > > > This manifests as a raised ion pump current but does not inhibit proper > > operation unless the current gets too high. > > > > I don't remember at what current a 5071A will shut down at but I can take > > a look in the manual. > > > > Corby > > ____________________________________________________________ > > Click here for free information on how to reduce your debt by filing for > > bankruptcy. > > http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw22U6KSiqbzGnzo8ijTIrFXhPWyQU8E > > VhPuk3kNAOgi96JqR/ > > _______________________________________________ > > 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.