[time-nuts] Symmetricom/Datum FTS-1050A Disciplined Frequency Standard (long time constant loops)

Speaking of long time constant analog loops for oscillator disciplining, see the attached PIX of the loop filter module from an FE AN/URQ-23. Also a PIX of the schematic. It is switch selectable for 1 or 100 Second time constants. I is also hermetically sealed to prevent leakage effects as it

[time-nuts] Regarding HP 5065A upgrade to 10811-oscillators

Hi, The -60109 usually does have the very good short term stability at short Tau but to actually use it you need to go open loop on the 5065A or 5061A/B. In closed loop the instrument actually drives the stability and pretty much any 10811 variant will work. HP knew this and recommended going

[time-nuts] HP 5065A, no 2nd harmonic.

With that offset either the oven set point has changed or there has een a component value shift in the oscillator circuit. The easiest way to test is to stick in another 10811 if available. You could also install one of the original 105 style oscillators if you have one. Cheers, Corby

[time-nuts] Re: HP 5065A, no 2nd harmonic.

Jared, You have to be within .25Hz so yes I'd say that's most likely your problem! Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow

[time-nuts] HP 5065A, no 2nd harmonic.

Jared, There is a non-hermetic electrolytic cap in the A7 (100uf C3) that if it leaks can "eat" the lead or trace off killing the gain.. Pull the A7 and take a look at that. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To

[time-nuts] Fw: HP 5065A, no 2nd harmonic.

Jared, A few things to try. On the bottom of the chassis Connect a scope to A8 pin 9. You should have a 137Hz (approx) sine wave of around 200mv P-P. If OK on the bottom of the chassis then connect the scope to A7 TP2 AC coupled. In open loop and with the 5Mhz within .1Hz you should see a

[time-nuts] Passive Maser teardown

Subject: Passive Maser teardown Just added "update 5" to http://www.leapsecond.com/maser/ It gives details on "digging down" to the cavity of the Maser. Cheers! Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an

[time-nuts] HP 5061 mini tube retrofit into 5071A part 2!

Hi! Here is part 2 of the notes for installing HP 5061A/B "mini" tubes into the 5071A. Cheers, Corby eepromnotesb.docx Description: MS-Word 2007 document ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to

[time-nuts] Noise floor test of my homemade DMTD

Tobias, To get accurate noise floor at the lower Tau you need to make sure your delay between each channel is set to as close to zero as possible. A variable phase shifter or various lengths of cables/connectors will work. Cheers, Corby ___

[time-nuts] Primary frequency standard

In reference to: "It would be cool to say one has a "primary standard", So, I think we should be careful with the term, it's get thrown around too lightly." Any of the hobby grade used Cesium standards is actually a Primary frequency standard as it does meet the definition of: A frequency

[time-nuts] Need wires from scrap HP cesium tubes

Working on a project and need the following. The HP high stability tubes have a pair of violet and violet/white wires exiting the potting that have the nylon push on connections. These were for the degaussing connection. I'm looking for 3 more sets of these wires. I do have a big pile of

[time-nuts] Better than average Rb oscillator

Skips data is very nice! But speaking of dropping into the -14ths, the HP 5065A is hard to beat. (Unless you are fortunate enough to have an 8607 option 8 sitting in your lab!) The Yellow trace on the attached comparison plot is my 5065A, it's a really excellent performer and drops into the

[time-nuts] Interesting widget for 5MHz standard fans

Walter, The widget is a module from the FTS 4050 series of Cesium standards. I have a couple of these modules. Schematics are in the manuals. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] A SIMPLE TIME INTERVAL COUNTER FOR DMTD WORK + Simple Dual Mixer

For some DMTD stuff on EEVBlogForum: https://www.eevblog.com/forum/metrology/dmtd-board/ https://www.eevblog.com/forum/metrology/dmtd-tutorial/ And lastly, https://www.eevblog.com/forum/metrology/a-simple-time-interval-counter-fo r-dmtd-work/ Many Thanks to Tom Van Baak for his help with

[time-nuts] Happy 20th Year

Thanks for the work in keeping this valuable resource up and running! Much appreciated. Corby Dawson ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and

[time-nuts] Holiday Hydrogen Glow!

And here is an EFOS2 Maser glow. Happy holidays, and Merry Christmas! Corby___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.

[time-nuts] HP5061 Cesium ion pump question

The gettering in the tube is only for capturing any stray Cesium atoms that don't get caught in the main gettering patch. If the gettering fails or gets too loaded up then the Cesium background level will get too high causing poor SN. The ion pump is for any gases. When a tube is off for

[time-nuts] HP5065a cfield issue

Paul, One other thing to check. Put a DC coupled scope on the C-field pot wiper and rotate the pot back and forth. Make sure there are no jumps or noise. Sometimes the pot gets noisy in a section. Rotating it back and forth across the bad sections will usually clean it up. Cheers, Corby

[time-nuts] HP5065a cfield issue

Paul, C-field current is adjustable from 2.5 to 6ma. I use a clip on milliammeter. Also you can kludge in an HP 3325A/B in place of the A1 synthesizer to see if that's the problem. Cheers, Corby ___ time-nuts mailing list --

[time-nuts] Early Christmas - DMTD up and running

Skip, Nice! Now you can go down another rabbit hole!!! Nothing fancy is needed for noise floor DMTD tests! Here is a PIX of what I use. - A passive SMA power splitter - a couple short SMA cables - an assortment of sma M to SMA F adaptors (elbows work nice) - A variable phase shifter from an HP

[time-nuts] "When you google word ..."

Also when you google "alien deviation" you get: About 11,800,000 results (0.50 seconds) Cheers! :>) Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com

[time-nuts] Query about insulated coax panel connectors

The 106D DMTD unit was designed by NBS (now NIST), and the BNC connectors I mentioned were also isolated from the chassis. The shield side was bypassed to the chassis ground inside via a 50 Ohm resistor and a .1uf capacitor. I retained those when I converted to isolated SMA. The center pin and

[time-nuts] 5065A Rb Cavity RX - Varactor repair

If the unit fails again just diconnect the 60Mhz output jack from A3 and Ohm from the center pin to shield on the cables connector with a semiconductor setting on the DVM. Try both directions as the diode can be installed either way. If you can "see" the diode that way it is most certainly good.

[time-nuts] 5065A Rb Cavity RX - Varactor repair?

Ulf, I have never had a 5065A with a bad or malfunctioning step recovery diode in the physics package. MANY other problems are more likely the cause. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Help getting 53131A to talk over RS232

I have done this before (years ago) but now I can't seem to get a count out over the RS232 port. I scoped pin 2 (pin ground) and can't see any data no matter what I try. I seem to remember a "secret" trick from back then but can't recall it. I'm counting time difference between two 1PPS

[time-nuts] BVA 8600 Available for sale: Link to Dropbox photos/ADEV plot.

Jorge, The longer Tau (BLUE) was measured against an excellent HP5065A Rubidium. The shorter Tau (Red) was measured against an excellent FTS 1200 Quartz. Hope that helps. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To

[time-nuts] FE-5680A Comm question!

Thanks for the inputs! I downloaded RealTerm and I could (eventually) get the unit send a response but could not get it to change frequency. Then I noticed you have to send an XOR checksum byte at the end of that command! Duh. Worked fine then. Anyway I can now program the frequency in an

[time-nuts] FE-5680A Comm question!

Hi, I have a few FE-5680A, one version with two labels and another version B with one label. The version B can be talked to with Hyperterminal or Ruby4 and does not work with VK4XV's program. The two label version I can only get to talk with VK4XV's FE-5680Calibrator program. I found info for

[time-nuts] 5065A A3 (Series 2644A) Schematic

Ulf, Here is the schematic of the late version A3. For some reason when I rotate it won't save rotated so it's upside down! When I get the parts lists and theory/alignment pages scanned I'll send them to you off list. A friend dug up a copy of my Gerber file What I think I might do is get

[time-nuts] Nice FE5680A on ebay!

Hi, I just listed a nice tested FE5680A on eBay http://ebay.us/vkiYWa?cmpnId=5338273189 I have several more in testing that will be listed also. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Dead 5065A - Regarding A3 (Series 2644A)

Ulf, I can scan the 2644A schematic and parts list. It might be a day or so. I also have an ExpressPCB file of a 2644A board I made. I have retrofitted that board into several (8 or so) A3 modules. I'll also add a PIX of a partially populated one. You have the boards made with a 2MM thickness

[time-nuts] Dead 5065A - Some comments - Some questions...

Ulf, The A1 modules are most likely OK. They do not need stellar performance for the 5065A to easily beat spec. The A3 modules are another matter! If you are indeed feeding them with 1VRMS and can't get a good output at J8 then something is not right! HP made several versions of the A3, the

[time-nuts] FE5680A comparator question

I see by searching around I see that the FE5680A uses a MAX913 comparator to square up the signal. Has anyone drawn out the schematic of how that is implemented? I want to try one for a project but the data sheet does not show examples. Cheers, Corby

[time-nuts] Isolated +20V for lamp supply

Luciano, You should "Ohm out" the lamp connector shield to the chassis with nothing connected to the connector. Depending on how your optical unit is mounted there is a good chance the lamp assy is grounded to the chassis through the threaded stud! Especially so if the optical is the newer

[time-nuts] Wanted: Some FE5650 or 5680A (rev B) synthesizer modules

Hi, Thought I'd see if anyone has some "dead" FE 5650A or FE 5680A (the rev B). I'm looking for a few of the synthesizer modules for some experiments. I don't need the rest of the unit. It's the board with the two tiny pushbuttons on it. See PIX. Willing to pay, but not too much! Cheers,

[time-nuts] "The Penultimate HP5065 A15"

Luciano, I agree entirely! I like the motto "do no harm"! When I try a mod such as replacing the dead op amp on the A9 board. I make before and after tests to make sure no degradation has occurred. Since this means parts in 10 -14th AD at 128 Seconds most don't have the capability. However a

[time-nuts] "The Penultimate HP5065 A15"

>> C-field polarity switch. An experiment. If nothing else >> I will be able to measure the residual magnetic field. There is no requirement to do any thing other than switch the C-field polarity. No optical stuff needed. The PRS10 switches the C-field polarity at a 5HZ rate to

[time-nuts] Double balanced mixer question

Hi, I'm feeding 5.0 MHZ and 5.01MHz into an HP10514A mixer. A buffer and a 12dB attenuator feed each input and a 50 Ohm buffer amp (10Mhz) is on the output. I get a nice sine output but get the 1Hz as amplitude variations. Playing with input levels I can minimize the variations but the

[time-nuts] HP 10811 versions for 5065A

Magnus and Tom, Thanks. I'm not (and don't want to be!) a phase noise nut! However I am an Allan Deviation nut and have documented many 5065A with the 10811 retrofit that drop into the -14ths between 64 and 128 Sec and the best show 4.5X10-14th at 1000 Sec. So I'd say the original circuit does

[time-nuts] HP 10811 versions for 5065A

Magnus, You mentioned: "The produced noise is at least 10 dB worse than you would expect. This impacts long term stability response as I have reported earlier." Can you refer me to the info you posted earlier or elaborate? Thanks, Corby ___

[time-nuts] HP 5065A Nifty A9 repair with pinout

Hi all, Attached is a PIX showing the opamp pinout! Cheers, Corby___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.

Re: [time-nuts] time-nuts Digest, Vol 192, Issue 25

Luciano, Hi I understand your A9 is the older version like the one in my post but with the original opamp module. I tested the 5065A with an unmodified and then one with the LH156H mounted and the 24 Hour phase plots were both clean and the AD were the same. My lab is not climate controlled

[time-nuts] f-multipliers from VHF to 10 GHz

This NLTL is cheaper @ $2436.56! MLPNC-7100S1SMA800 Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.

[time-nuts] Need a couple pages from the HP 5062C manual

Hi, I have a manual but it does only goes up to serial prefix 1836A and therefore does not have the manual changes for the 1844A series. Actually I have one page I photocopied years ago. The top of the page reads: MANUAL CHANGES MODEL 5062C and 5062C OPT. 010 Page 3 It shows steps 10 thru 23

[time-nuts] Any spare HP 5065A A3 and HP5062C A10 modules?

Hi, Doing some experiments and need HP 5065A A3 and/or HP5062C A10 modules. They are the 5 to 60 MHz and 5 to 90 MHz multiplier modules. Anyone have some laying around? Cheers, Corby Dawson ___ time-nuts mailing list -- time-nuts@lists.febo.com To

[time-nuts] Modern HP5065A adjustment ideas

Poul-Henning, Hi! I never use the XY method in the manual. It's much easier just to use the scope in the normal mode. I don't try to synch the scope, just use the fine horizontal control to give me a few cycles on the trace with it close to stationary (slow roll). The splitting is easy to

[time-nuts] Crystal filters in test equipment

The hp 00105-6013 and its variants used in the older 105A, 5061A, 5065A, and a couple counters also has a crystal filter (5Mhz). I believe it's the last HP oscillator to do so. If your output amplitude seems low try tweaking the filter adjustment! Cheers, Corby

[time-nuts] HP 106B on Ebay

If whoever bought it needs advice I have repaired a couple of them. It does not have a dewar. Both the units I worked on had low to mid parts in 10 -13th from 1 to 100 Sec. They do take 3 to 4 hours to warm up so don't be impatient. Aging wont slow down for several weeks. Cheers, Corby

[time-nuts] Used HP 5061A cesium tube

Luiz, When shopping for a used tube look for a standard "mini" tube like the one in the ebay listing. https://www.ebay.com/itm/HP-Agilent-5061A-Cesium-Frequency-Standard-w-Opt -01-C13-Good-Working-Unit/233521981160?hash=item365efea6e8:g:HeAAAOSwY2pe Z~fB Don't trust any option 4 high stability

[time-nuts] Pressure sensitivity of Rb vapor cell standards

Attila, I believe your original question was how to compensate for atmospheric pressure changes on the cell. It is the cell that is affected by pressure NOT the lamp! This post gives some info. https://www.febo.com/pipermail/time-nuts/2016-May/097829.html Cheers, Corby

[time-nuts] Symmetricom 023-63008-07 5MHz Crystal Oscillators

Bob, I just might play at the mixing to see if it will work! Hmmm, 16 oscillators give a cold current of 12.8 Amps! The direct sellers you find with Google sell them for <$20.00 each. One of them: https://www.teewtfstore.com/index.php?main_page=product_info_id= 244548 This seller (can't

[time-nuts] 5065 photo/lamp problem

Magnus, If you apply a +20V supply to the lamp connector you should see 125-150ma unlit and it drops bit when it lights. Also measure from the lamp connector center pin to the outside conductor with an Ohmmeter. You should have around 3.33K. The 1.33K resistor (in series with a 2.0K) is a

[time-nuts] HP 5065A "known unit" update

Hi, They keep coming out of hiding! Currently my list shows 246 total units of which 26 are the latest prefix 2816A units. Anyone that has one that hasn't send me their Serial number please do! Cheers, Corby Dawson ___ time-nuts mailing list --

[time-nuts] Need info from a very old HP 5065A manual!!!

Hi, The oldest manual I have for the 5065A is for a prefix 1220A and the oldest change it lists is for the prefix 820 units. Does anyone have an older manual that is for or lists the changes for a prefix 808 unit? Need the info for the front panel adj mag field/loop open/operate switch. All

[time-nuts] Dead 5061B

Jim, The filament is a hot wire ionizer that functions to ionize the atoms in the beam so that the mass spectrometer will be able to steer them to the electron multiplier. It is a thin ribbon and not likely to be reattached once it burns open. Cheers, Corby

[time-nuts] Cold Rubidium over hyped?

The pressure sensitivity for a classic design can easily be eliminated. I'm pretty sure that the old Varian R20 cell was mostly immune. Either using the R20 design or stiffer convex ends in a modern design would work. Also a sealed optical unit has been used to get rid of the pressure

[time-nuts] Cold Rubidium over hyped?

Well I have been looking at the data in the https://www.researchgate.net/publication/325499937_A_portable_cold_87_Rb_ atomic_clock_with_frequency_instability_at_one_day_in_the_10-15_range link and find that maybe they are overstating their performance! In the plot of figure 5 my HP 5065A

[time-nuts] Rubidium cell or lamp rejuvenation.

The following references describe the main failure mode of Rubidium lamps which is Rubidium depletion. If the thermal design is correct and the oven and supporting circuitry are working properly any condensed Rubidium will be redistributed (back into the tip-off region) during operation. On the

[time-nuts] Rubidium cell or lamp rejuvenation. WAS-HP 5065A owners, a question!

JF, Reference your statement: "Sorry, but I don't agree with your first statement about the 5065A : after long use, the rubidium plates on the inner envelope of the lamp (like silver on a mirror) and years after years the Rb light and photo I decreases." After working on the 5065A for over 40

[time-nuts] Cesium shipping exemption. (was) HP5071A with bad tube.... can I get one used?

Well I can't figure out how to attach the link but if you search for "hp 5071a shipping exemption" in google you will find : "PDF] Shipping Instruction - Cesium & Rubidium ... - Microsemi how to" Click on it and it will open a PDF of the form. You will see that it exempts most requirements, the

[time-nuts] Rubidium cell or lamp rejuvenation. WAS-HP 5065A owners, a question!

There are two separate Rubidium migration problems. The first is Lamp flooding which occurs when too much Rubidium enters the main bulb and plates onto the bulb envelope. (usually after long storage or storage at high temperatures) This mainly in the small telecomm Rubidiums due to design flaws.

[time-nuts] HP 5065A owners, a question!

Hi, How many of you leave your 5065A on all the time? Approximately how many years have you had it running without major maintenance? My current "gold standard" 5065A has been running for over 5 years. Cheers! Corby ___ time-nuts mailing list --

[time-nuts] Ancient HP 5065A on ebay

There is an 5065A on Ebay that has the earliest SN I have ever seen. 808-00031 or maybe 00051? Maybe the first one sold? If the lamp oven has not fried it might be a fun project. It has the Patek analog clock. Cheers, Corby ___ time-nuts mailing

[time-nuts] HP OCXO's 10544A and 10811A

Walter, The 10811 uses an SC cut crystal and a more modern oven control circuit. Much better short term stability and warmup than the 10544 it replaced! Cheers, Corby http://www.leapsecond.com/museum/10544/1972-Oct-hp-10544A.pdf http://www.leapsecond.com/museum/10811a/90027-1.pdf

[time-nuts] It is possible to "recharge" a hydrogen maser?

Luiz, Found some more info on replenishing the Hydrogen in the Kvarz CH1-76 and CH1-75. Anders had the procedure pretty close for a fully charged canister from the vendor. However recharging the original is a bit more challenging! Use care and protective gear from the high and low temperatures

[time-nuts] Is the lifetime of a Rb standard dependent on operating orientations

Hi, At operating temperature the lamp, filter cell (if used) and the resonance cell only have gaseous Rubidium in them. Only exception is early designs that have a "stem" on the resonance cell that exits the cavity. There is a small amount of liquid Rubidium in the stem and in the 5065A a

[time-nuts] EFOS Maser prototype display

Check the picture out here: https://www.eevblog.com/forum/metrology/efos-maser-prototype-in-museum-di splay/new/#new Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Used Hydrogen Maser

Perrier, Hi! Depends on the type and model, Active or Passive Maser etc. I believe new active Masers run in the 1/4 million dollar range. T4 science offers some nice Passive Masers but I don't know the cost. pH Maser 1008 https://www.t4science.com/products/phmaser-1008/ On the basis of just

[time-nuts] It is possible to "recharge" a hydrogen maser?

Luiz, Ch1-75 Hydrogen storage details. “The compound LaNi5H, is used for storing molecular hydrogen. The LaHi5H, is characterized by high hydrogen partial pressure (2 to 5 atmospheres) at +(20-50) degrees C. 250 grams of the compound contains 18 liters of hydrogen at normal pressure. It is

[time-nuts] Are there any company selling refurbished/reconditioned Cesium tubes?

When evaluating an instrument with a used tube the beam current is not the best indicator to look at! For an HP instrument If the tube label has the EM voltage listed then with the beam current set to it's proper level check the current EM voltage. As the tube ages you will require more and more

[time-nuts] It is possible to "recharge" a hydrogen maser?

Luiz, Once I know the model number of the Maser I can give some advice. I recharged the Hydrogen bottle of the EFOS2 Maser 4 times in the past with no problem. Really depends on the method of Hydrogen storage and if they made provision for field repair, I.E. threaded fittings vice welded

[time-nuts] Frequency Standard in personal lab

Taka, I'm assuming you meant an HP 53132A? Anyway to make meaningful measurements you need a DMTD setup or some other resolution expanding scheme. An HP 5065A would be your best bet to add to your stable! Between a good cherry picked Quartz and the 5065A you could cover most bases easily!

[time-nuts] Neat looking DMTD unit on eBay

Hi, A friend directed me to this listing. Nice looking DMTD unit. Low power and compact! Has anyone played with one of these yet? https://www.ebay.ca/itm/123728915157?ul_noapp=true Cheers, Corby ___ time-nuts mailing list --

[time-nuts] GPS week rollover

Are we expecting any week rollover problems with the receivers we time nuts like to play with??? Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Help needed with Tracor 308A Rubidium Frequency Standard

Heinz, The relay you hear "clicking" is the relay that generates the HV start pulse for the lamp. Once the lamp starts and is detected by the preamp circuit the relay stops cycling. You can pull the OMU and leave it connected up. Pull the covers off the lamp end of the OMU and the metal

[time-nuts] HP5065A on eBay WARNING

Hi, Wanted to warn about the 5065A that has now sold twice on eBay. (Jan 18 and Feb 2) When it first listed I contacted the seller and told him the optical unit was missing (A12) and he should not call it "fully functional" Anyway he sold it for his asking price and now it looks like he just

[time-nuts] PPS clock module

John, The clock modules from the 5061A and 5065A take a 1PPS input! I have several I can sell. However they are not suitable for a portable app as they are power hogs! Although they do have a circuit that kills the display if the standard is on battery power, you can then push the button on

[time-nuts] RF isolation amplifier question

Hi, I removed this amp from the EFOS2 Maser as it was intermittent. Of course now I can't get it to fail on the bench! I have fabricated a new PC board to replace it and have the components on hand. Note the 12pfd cap on the collector . Some notes I have indicate is select at test and that is

[time-nuts] Need help machining an Aluminum cylinder

Hi, I remember a few that had machine shops volunteering to help with machining last year but can't remember who! I have a 2 and 3/8" diameter cylinder 1.45" long. It needs nine 1/6" deep X 1/16" wide grooves machined in the circumference and adding some length to a slot already existing running

[time-nuts] HP 5065A A1 replacement with DDS

Hi, My purpose was to provide an inexpensive (<$30.00) and simple way to replace a defective A1 without degrading the performance the original A1 gave. The Chinese DDS allows this without having to solder all those tiny pins! Both styles actually performed better than the original, and the same

[time-nuts] Want info on Bliley NV26T992 oscillator

Hi, Anyone have hookup info for the Bliley NV26T992 https://www.ebay.com/itm/Bliley-Technologies-Crystal-Oscillator-10-0MHz-N V26T992/181179304420?epid=19019617029=item2a2f20c9e4:g:opQAAOxyOnRR6 T04 Looks to be a cute cleanup oscillator but I can't find any seller that has pinout info. and

[time-nuts] HP cesium beam tube life

The "shelf life" referred to is only related to tube vacuum without pumping occasionally. It was derived from an estimate of how badly a worst case tube would leak. Most tubes have an almost perfect vacuum seal and this "shelf life" is indefinite. Leaving a 5061A/B on and in the Cs-off mode