Hello fellow timenuts, for my old PRS10 I need some information and help with technical informations. I have this item bought quite some years ago and I have manufactured an interface cable with the special connector last year. Did work fine. Taken out of storage I do get anymore the lock and PPS signal out. The 10 MHz output does look very good, the unloaded sine voltage is 2.8 Vpp and the frequency is very precise and stable very close to the trimble thunderbolt GPS-out signal at abt. 10E-11. In the annex you can see the data output with more delailed info. Can somebody tell me more, is the life at the end and what and how can be done to revitalize this nice time machine? How much time more is expectable? kind regards, Arnold

Hi Arnold; If you compare the 10MHz to another standard it will most likely show the quartz is in free run. Since quartz acts as a fly wheel for the rubidium the output would look good from all other aspects (Amplitude and Spectral Purity). So it appear to me you are experiencing an issue with the Rubidium Section. I hope that helps. Cheer; Thomas Knox ________________________________ From: time-nuts <time-nuts-bounces@febo.com> on behalf of Arnold Tibus <arnold.tibus@gmx.de> Sent: Wednesday, February 28, 2018 11:47 AM To: time-nuts@febo.com Subject: [time-nuts] PRS10 Information and help needed Hello fellow timenuts, for my old PRS10 I need some information and help with technical informations. I have this item bought quite some years ago and I have manufactured an interface cable with the special connector last year. Did work fine. Taken out of storage I do get anymore the lock and PPS signal out. The 10 MHz output does look very good, the unloaded sine voltage is 2.8 Vpp and the frequency is very precise and stable very close to the trimble thunderbolt GPS-out signal at abt. 10E-11. In the annex you can see the data output with more delailed info. Can somebody tell me more, is the life at the end and what and how can be done to revitalize this nice time machine? How much time more is expectable? kind regards, Arnold

Hello Arnold, A frequency offset of a part in 10E-11 still sounds healthy to me. I wonder whether there is some kind of electronic problem? I have run 40 or so PRs10s and the lamp is the usual bit that dies. If you hook up a computer to the RS232 port, there are lots of diagnostics available. Cheers Michael On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <arnold.tibus@gmx.de> wrote: > Hello fellow timenuts, > > for my old PRS10 I need some information and help with technical > informations. > I have this item bought quite some years ago and I have manufactured an > interface cable with the special connector last year. Did work fine. > Taken out of storage I do get anymore the lock and PPS signal out. > The 10 MHz output does look very good, the unloaded sine voltage is 2.8 > Vpp and the frequency is very precise and stable very close to the > trimble thunderbolt GPS-out signal at abt. 10E-11. > In the annex you can see the data output with more delailed info. > Can somebody tell me more, is the life at the end and what and how can > be done to revitalize this nice time machine? How much time more is > expectable? > > kind regards, > > Arnold > _______________________________________________ > 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.

Hello Michael and Tom, thanks for the quick reaction! Of course I did already think that the rubidium cell doesn't work any more, but then I was astonished after more than 1 hour running how precise the output frequency is and I could not see a drift beyond the natural noise/ fluctuations which I can see as well with Tr. Thundelbolt. I did not yet look deeper e.g. observing the longtime behaviour nor did I open the box (yet), anyway I don't know much about the electronic internals. I have running the RbMon and looked to the data list which I have annexed. It doesn't explain much for me therefore I am asking for help and support to find possible solutions, there are so much excellent experts out here. I am worried that in fact the Rb capsule went over the Jordan ... perhaps it can be revitalized but I have no experience with it. I doupt a bit the lamp heater control value etc., ad5 to ad9. What is the range ... ? How shall one understand these and other values? But finally, how can one improve the situation? I am open for all good hints, instructions and ideas! (I am sure that there are other timenuts also interested ;-) ) many thanks in advance Arnold Am 28.02.2018 um 21:02 schrieb Michael Wouters: > Hello Arnold, > > A frequency offset of a part in 10E-11 still sounds healthy to me. I wonder > whether there is some kind of electronic problem? > I have run 40 or so PRs10s and the lamp is the usual bit that dies. > If you hook up a computer to the RS232 port, there are lots of diagnostics > available. > > Cheers > Michael > > On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <arnold.tibus@gmx.de> wrote: > >> Hello fellow timenuts, >> >> for my old PRS10 I need some information and help with technical >> informations. >> I have this item bought quite some years ago and I have manufactured an >> interface cable with the special connector last year. Did work fine. >> Taken out of storage I do get anymore the lock and PPS signal out. >> The 10 MHz output does look very good, the unloaded sine voltage is 2.8 >> Vpp and the frequency is very precise and stable very close to the >> trimble thunderbolt GPS-out signal at abt. 10E-11. >> In the annex you can see the data output with more delailed info. >> Can somebody tell me more, is the life at the end and what and how can >> be done to revitalize this nice time machine? How much time more is >> expectable? >> >> kind regards, >> >> Arnold >> _______________________________________________ >> 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. >

Arnold, This is my old PRS-10 after it kicked the bucket (two weeks after an SRS engineer predicted that it would go this way). [Machine generated alternative text: Factory Settings Analog Output Values Ipps Control sd0 sdl sd2 sd3 sd4 sd5 sd8 sd7 R N A SF MO PH FC 149 128 255 150 178 130 100 185 8293 3537 4 -813 1440 2737 2579 o 7 24 2117.01 -1.0 Step Rec. Diode Delay Value Fet Voltage Set Lamp Temp. Set Crystal T emp. Set Cell Temp. set Output Voltage RF Modulation SP Param. (PLL) Set Frequency Set Slope Mag. Offset Mag. Read Mag. Switching Lock Gain Phase Enable Power 1 OMHz DAC Signal Values ad0 adl ad2 • ad3 ad4 ad5 ad8 ad8 adl 0 adl 1 adl 2 • ad13 adl 4 ad15 adl 8 adl 8 ad13 0.005 2.321 2.321 1.57 0.328 2.011 2.337 0.037 2.587 0.005 0.827 o. 968 0.970 o. 771 1.483 0.005 1.090 2.880 1.710 4.900 Spare +24 Volt Heat. +24 Volt Elec. Lamp Drain Lamp Gate Crystal Heat Ctrl Cell Heat Ctrl Lamp Heat Ctrl AC Photosignal Photocell IN Case Temp. Xtal Thermistors Cell T hermistors Lamp Thermistors Frequency Pot Analog Ground 22M H z Varactor Auto Gain Ctrl RF Lock TO TS PS PI TT -1782 13972 190 8 2 Time Offset Time Slope Pulse Slope Phase Lock Time Constant Stability Factor Integral Term Lock Mode Last Valid Tag] And this is the replacement after some months of operations, sync to the 1PPS of a Thunderbolt-E: [cid:image004.jpg@01D3B0E3.047927B0] Hope this helps, Peter

As I have the impression that my very small data pdf was not transferred, I add therefore this explanatory data again but in open document format odt with 10 kB. Hopefully this will pass now. Arnold Am 28.02.2018 um 22:14 schrieb Arnold Tibus: > Hello Michael and Tom, thanks for the quick reaction! > > Of course I did already think that the rubidium cell doesn't work any > more, but then I was astonished after more than 1 hour running how > precise the output frequency is and I could not see a drift beyond the > natural noise/ fluctuations which I can see as well with Tr. > Thundelbolt. I did not yet look deeper e.g. observing the longtime > behaviour nor did I open the box (yet), anyway I don't know much about > the electronic internals. > I have running the RbMon and looked to the data list which I have > annexed. It doesn't explain much for me therefore I am asking for help > and support to find possible solutions, there are so much excellent > experts out here. > I am worried that in fact the Rb capsule went over the Jordan ... > perhaps it can be revitalized but I have no experience with it. > I doupt a bit the lamp heater control value etc., ad5 to ad9. > What is the range ... ? How shall one understand these and other values? > But finally, how can one improve the situation? > > I am open for all good hints, instructions and ideas! (I am sure that > there are other timenuts also interested ;-)  ) > > many thanks in advance > > Arnold > > Am 28.02.2018 um 21:02 schrieb Michael Wouters: >> Hello Arnold, >> >> A frequency offset of a part in 10E-11 still sounds healthy to me. I >> wonder >> whether there is some kind of electronic problem? >> I have run 40 or so PRs10s and the lamp is the usual bit that dies. >> If you hook up a computer to the RS232 port, there are lots of >> diagnostics >> available. >> >> Cheers >> Michael >> >> On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <arnold.tibus@gmx.de> wrote: >> >>> Hello fellow timenuts, >>> >>> for my old PRS10 I need some information and help with technical >>> informations. >>> I have this item bought quite some years ago and I have manufactured an >>> interface cable with the special connector last year. Did work fine. >>> Taken out of storage I do get anymore the lock and PPS signal out. >>> The 10 MHz output does look very good, the unloaded sine voltage is 2.8 >>> Vpp and the frequency is very precise and stable very close to the >>> trimble thunderbolt GPS-out signal at abt. 10E-11. >>> In the annex you can see the data output with more delailed info. >>> Can somebody tell me more, is the life at the end and what and how can >>> be done to revitalize this nice time machine? How much time more is >>> expectable? >>> >>> kind regards, >>> >>> Arnold >>> _______________________________________________ >>> 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.

Hi Arnold, It looks like your oscillator is locked to the rubidium and it is configured to lock to an incoming PPS sig, but the TT value is null, so maybe you have forgotten to connect the GPS? Or maybe to the wrong connector? Check the PPS in to see if you have a good signal. I don’t know about the ranges of the ad5,ad9 values. Yours are a little lower than the one I have been looking at? regards, Mike > Le 28 févr. 2018 à 22:14, Arnold Tibus <arnold.tibus@gmx.de> a écrit : > > Hello Michael and Tom, thanks for the quick reaction! > > Of course I did already think that the rubidium cell doesn't work any more, but then I was astonished after more than 1 hour running how precise the output frequency is and I could not see a drift beyond the natural noise/ fluctuations which I can see as well with Tr. Thundelbolt. I did not yet look deeper e.g. observing the longtime behaviour nor did I open the box (yet), anyway I don't know much about the electronic internals. > I have running the RbMon and looked to the data list which I have annexed. It doesn't explain much for me therefore I am asking for help and support to find possible solutions, there are so much excellent experts out here. > I am worried that in fact the Rb capsule went over the Jordan ... perhaps it can be revitalized but I have no experience with it. > I doupt a bit the lamp heater control value etc., ad5 to ad9. > What is the range ... ? How shall one understand these and other values? > But finally, how can one improve the situation? > > I am open for all good hints, instructions and ideas! (I am sure that there are other timenuts also interested ;-) ) > > many thanks in advance > > Arnold > > Am 28.02.2018 um 21:02 schrieb Michael Wouters: >> Hello Arnold, >> A frequency offset of a part in 10E-11 still sounds healthy to me. I wonder >> whether there is some kind of electronic problem? >> I have run 40 or so PRs10s and the lamp is the usual bit that dies. >> If you hook up a computer to the RS232 port, there are lots of diagnostics >> available. >> Cheers >> Michael >> On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <arnold.tibus@gmx.de> wrote: >>> Hello fellow timenuts, >>> >>> for my old PRS10 I need some information and help with technical >>> informations. >>> I have this item bought quite some years ago and I have manufactured an >>> interface cable with the special connector last year. Did work fine. >>> Taken out of storage I do get anymore the lock and PPS signal out. >>> The 10 MHz output does look very good, the unloaded sine voltage is 2.8 >>> Vpp and the frequency is very precise and stable very close to the >>> trimble thunderbolt GPS-out signal at abt. 10E-11. >>> In the annex you can see the data output with more delailed info. >>> Can somebody tell me more, is the life at the end and what and how can >>> be done to revitalize this nice time machine? How much time more is >>> expectable? >>> >>> kind regards, >>> >>> Arnold >>> _______________________________________________ >>> 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. "The power of accurate observation is commonly called cynicism by those who have not got it. » George Bernard Shaw

Hi Mike, very interesting what you are saying, I remember long months ago that I prepared the RbO for the calibration with the 1 PPS from Thunderbolt. Then I stored it away until today ... Perhaps this I should look after, but today it is already too late ... Would be great, if my nice box would do the job still some or better a lot of years more! Unfortunately I have actually also problems with my Thunderbolt output of the 1 PPS. So, it is hard to be a timenut! Thank you, regards, Arnold Am 28.02.2018 um 23:16 schrieb Mike Cook: > Hi Arnold, > It looks like your oscillator is locked to the rubidium and it is configured to lock to an incoming PPS sig, but the TT value is null, so maybe you have forgotten to connect the GPS? Or maybe to the wrong connector? Check the PPS in to see if you have a good signal. > I don’t know about the ranges of the ad5,ad9 values. Yours are a little lower than the one I have been looking at? > regards, > Mike > > >> Le 28 févr. 2018 à 22:14, Arnold Tibus <arnold.tibus@gmx.de> a écrit : >> >> Hello Michael and Tom, thanks for the quick reaction! >> >> Of course I did already think that the rubidium cell doesn't work any more, but then I was astonished after more than 1 hour running how precise the output frequency is and I could not see a drift beyond the natural noise/ fluctuations which I can see as well with Tr. Thundelbolt. I did not yet look deeper e.g. observing the longtime behaviour nor did I open the box (yet), anyway I don't know much about the electronic internals. >> I have running the RbMon and looked to the data list which I have annexed. It doesn't explain much for me therefore I am asking for help and support to find possible solutions, there are so much excellent experts out here. >> I am worried that in fact the Rb capsule went over the Jordan ... perhaps it can be revitalized but I have no experience with it. >> I doupt a bit the lamp heater control value etc., ad5 to ad9. >> What is the range ... ? How shall one understand these and other values? >> But finally, how can one improve the situation? >> >> I am open for all good hints, instructions and ideas! (I am sure that there are other timenuts also interested ;-) ) >> >> many thanks in advance >> >> Arnold >> >> Am 28.02.2018 um 21:02 schrieb Michael Wouters: >>> Hello Arnold, >>> A frequency offset of a part in 10E-11 still sounds healthy to me. I wonder >>> whether there is some kind of electronic problem? >>> I have run 40 or so PRs10s and the lamp is the usual bit that dies. >>> If you hook up a computer to the RS232 port, there are lots of diagnostics >>> available. >>> Cheers >>> Michael >>> On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <arnold.tibus@gmx.de> wrote: >>>> Hello fellow timenuts, >>>> >>>> for my old PRS10 I need some information and help with technical >>>> informations. >>>> I have this item bought quite some years ago and I have manufactured an >>>> interface cable with the special connector last year. Did work fine. >>>> Taken out of storage I do get anymore the lock and PPS signal out. >>>> The 10 MHz output does look very good, the unloaded sine voltage is 2.8 >>>> Vpp and the frequency is very precise and stable very close to the >>>> trimble thunderbolt GPS-out signal at abt. 10E-11. >>>> In the annex you can see the data output with more delailed info. >>>> Can somebody tell me more, is the life at the end and what and how can >>>> be done to revitalize this nice time machine? How much time more is >>>> expectable? >>>> >>>> kind regards, >>>> >>>> Arnold >>>> _______________________________________________ >>>> 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. > > "The power of accurate observation is commonly called cynicism by those who have not got it. » > George Bernard Shaw > > _______________________________________________ > 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. >

Just to double check, here is Arnold's original PDF, and also the PDF without multi-dots, plus a PNG and JPG version. One of these has to work! I'm not sure what went wrong with his first try; I'm looking into it. PDF files should work fine on time-nuts (and preferred over DOC or ODT). /tvb 61b9feb7 8,107 PRS10-status 3 28.Feb.2018.pdf 61b9feb7 8,107 PRS10-status-3-28-Feb-2018.pdf a3aa1050 34,228 PRS10-status-3-28-Feb-2018.png b65565c9 224,178 PRS10-status-3-28-Feb-2018.jpg ----- Original Message ----- From: "Arnold Tibus" <arnold.tibus@gmx.de> To: <time-nuts@febo.com> Sent: Wednesday, February 28, 2018 1:51 PM Subject: Re: [time-nuts] PRS10 Information and help needed As I have the impression that my very small data pdf was not transferred, I add therefore this explanatory data again but in open document format odt with 10 kB. Hopefully this will pass now. Arnold