Hi I normally keep a watch on the lamp voltage (or what ever it actually is). I was once told by somebody who should know that you simply watch for it to drop. When it starts going down a couple volts, that’s when you should start looking for a backup. It may run for months after it starts to drop. It may run for weeks. There apparently is no good way to be sure. On a part that starts at 6 to 7 volts, that would equate to something a 3 to 4 volt limit.
Bob > On Nov 20, 2014, at 9:00 PM, paul swed <[email protected]> wrote: > > Unless you have a way to know what they are doing. You won't know if they > are failing. The initial sign is that they wink-out and restart. You will > spot it as your gear going nuts for a bit and then magically locking up. > Also as an approx lamp V in the 2-3V range. Thats really a gross figure I > can't swear thats EOL. But its some place close to that. > As such I installed the Rb winkOmeter on my unit. > Regards > Paul > WB8TSL > > On Thu, Nov 20, 2014 at 6:09 PM, Bob Camp <[email protected]> wrote: > >> Hi >> >> So far, I have yet to have one of the Rb’s die (of the ones that worked >> when new to me). The magic “lamp voltage” on the Efratom versions clusters >> in two groups. That seems to be related to some sort of production change >> rather than better performance on the (slightly) newer parts. >> >> Bob >> >>> On Nov 20, 2014, at 9:17 AM, paul swed <[email protected]> wrote: >>> >>> On the old telco RBs $25 they all worked, but were down on lamp life. So >>> the first one chosen ran for 3 years and then started blinking out. >>> Replaced it with another. That first one is the one I used the heat gun >> on >>> and is again operable with what appears could be good lamp life. >>> (Reasonable) >>> Regards >>> Paul >>> WB8TSL >>> >>> On Thu, Nov 20, 2014 at 7:00 AM, Bob Camp <[email protected]> wrote: >>> >>>> Hi >>>> >>>> So far, I have not found any of the Rb’s that came out of the KS boxes >>>> with troubles. The ones I got and pulled from boxes myself all have >> worked >>>> fine. The units that got pulled on the other side of an ocean, not so >> much. >>>> There have been a couple of them with issues. What ever they go through >>>> getting shipped overseas and salvaged, it’s not doing the parts any >> good. >>>> That’s one of the reasons getting the newer design KS boxes NIB has a >> lot >>>> of appeal. There are infant mortality reliability issues to deal with on >>>> new stuff. I’d rather have those issues than end of life and corrosion. >>>> >>>> Bob >>>> >>>> >>>>> On Nov 19, 2014, at 9:05 PM, paul swed <[email protected]> wrote: >>>>> >>>>> And I am the happy owner of 4 or 5 of the $25 RBs. Hey they are old but >>>> you >>>>> can recover them with the old heatgun trick. That said glowing things >>>> like >>>>> those do tend to wear out. I could see why they moved away from them. >>>>> >>>>> On Wed, Nov 19, 2014 at 8:15 PM, Bob Camp <[email protected]> wrote: >>>>> >>>>>> Hi >>>>>> >>>>>> Lucent has been putting GPS based Radio Frequency Timing Generators >>>> (RFTG) >>>>>> into cell sites for a long time. They all have the 15 MHz and pps >>>> outputs >>>>>> in common. Lucent also seems to like one paint color and an >> approximate >>>>>> size. For what ever reason (because they can?) the model numbers and >>>>>> internal designs change from time to time. For quite a while they >> really >>>>>> liked the idea of running Rb’s in cell sites. Looking at the latest >>>> batch >>>>>> of parts, that seems to have changed around 1999. >>>>>> >>>>>> Lots of generations of very similar looking boxes with very different >>>>>> stuff inside each of them. >>>>>> >>>>>> Bob >>>>>> >>>>>>> On Nov 19, 2014, at 7:53 PM, paul swed <[email protected]> wrote: >>>>>>> >>>>>>> I just saw the picture of the units front panel and it looked the >> same. >>>>>>> Oh well. >>>>>>> Regards >>>>>>> Paul >>>>>>> WB8TSL >>>>>>> >>>>>>> On Wed, Nov 19, 2014 at 7:08 PM, Bob Camp <[email protected]> wrote: >>>>>>> >>>>>>>> Hi >>>>>>>> >>>>>>>> This is a branch thread that never got it’s title changed to drop >> the >>>>>>>> KS-24361 part of it. More or less it’s “compare the older KS boxes >> to >>>>>> the >>>>>>>> newer ones”. >>>>>>>> >>>>>>>> Bob >>>>>>>> >>>>>>>>> On Nov 19, 2014, at 6:03 PM, Dan Rae <[email protected]> wrote: >>>>>>>>> >>>>>>>>> On 11/19/2014 2:47 PM, paul swed wrote: >>>>>>>>>> Was doing a search for Lucent RFTGm-II-XO looking for alternates >> to >>>>>> the >>>>>>>>>> $150 solution. >>>>>>>>>> A 10 Mhz mod popped up. >>>>>>>>>> >>>>>>>>>> http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf >>>>>>>>>> >>>>>>>>>> Looks simple enough and I have not validated anything. >>>>>>>>>> Regards >>>>>>>>>> Paul >>>>>>>>>> WB8TSL >>>>>>>>>> >>>>>>>>> Paul, that has nothing to do with the current ebay offerings that >>>> have >>>>>>>> generated so much traffic recently... >>>>>>>>> >>>>>>>>> Dan >>>>>>>>> _______________________________________________ >>>>>>>>> time-nuts mailing list -- [email protected] >>>>>>>>> To unsubscribe, go to >>>>>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>>>>>> and follow the instructions there. >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> time-nuts mailing list -- [email protected] >>>>>>>> To unsubscribe, go to >>>>>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>>>>> and follow the instructions there. >>>>>>>> >>>>>>> _______________________________________________ >>>>>>> time-nuts mailing list -- [email protected] >>>>>>> To unsubscribe, go to >>>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>>>> and follow the instructions there. >>>>>> >>>>>> _______________________________________________ >>>>>> time-nuts mailing list -- [email protected] >>>>>> To unsubscribe, go to >>>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>>> and follow the instructions there. >>>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- [email protected] >>>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
