Re: [time-nuts] HP 5065A

Thanks for the note, Ulrich-Rohde, N1UL Sent from my iPhone > On Feb 24, 2018, at 8:59 PM, MIKE ELDRIGE wrote: > > TO ALL: > > HP 5065A IS sold. > Thank you, Mike > > -- Mike, KG7AT > mike.eldr...@msn.com > > > _

[time-nuts] HP 5065A

TO ALL: HP 5065A IS sold. Thank you, Mike -- Mike, KG7AT mike.eldr...@msn.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] HP 5065A super

FRK is possible candidate we are looking at it add filter, reduce time constant Corby did but forgot to reduce filter  time constant. 5065A is 0.05 seconds.  We have to many projects low on the list Juerg is right now doing the new A9 for Corby If any body wants to seriously get involved contact

[time-nuts] HP 5065A super

Perrier, The telecom Rubidiums don't leave much meat on the bone for improvements as they sacrificed pretty much everything else to be cheap, small, and low power consumption. Most of these tradeoffs work directly against trying to get better short term stability out of them. Bummer. Cheers, C

[time-nuts] HP 5065A super

List, I've been following the ongoing mod process for the HP 5065A super on the list. Two questions: 1. Are any of these upgrades applicable to the Lucnet and other Rb units? 2. Are there any other Rb units available (that don't cost you your first born child IF they can be found) that could be f

Re: [time-nuts] HP 5065A super

In message <2a6c14a0-823a-4177-aefd-bed8bcea8...@n1k.org>, Bob kb8tq writes: >It turns out that the nickel’s really awful magnetic properties at RF [...] The semiconductor industry has serious problems with electromigration of very tiny copper conductors. A large company in the business

Re: [time-nuts] HP 5065A super

Hi > On Feb 23, 2018, at 6:17 PM, jimlux wrote: > > On 2/23/18 1:33 PM, Bob kb8tq wrote: >> Hi >>> On Feb 23, 2018, at 4:23 PM, Attila Kinali wrote: >>> >>> Hoi Bob, >>> >>> On Thu, 22 Feb 2018 21:58:09 -0500 >>> Bob kb8tq wrote: >>> The same nickel plating effect gets into a lot of th

Re: [time-nuts] HP 5065A super

On 2/23/18 1:33 PM, Bob kb8tq wrote: Hi On Feb 23, 2018, at 4:23 PM, Attila Kinali wrote: Hoi Bob, On Thu, 22 Feb 2018 21:58:09 -0500 Bob kb8tq wrote: The same nickel plating effect gets into a lot of things. If you are shopping for very low IMD connectors, nickel plating is out. Things

Re: [time-nuts] HP 5065A super

On Thu, Feb 22, 2018 at 3:29 PM, Leo Bodnar wrote: > Here is ENIG fact that is not widely known at the moment but which some might > find useful. > > I could not understand why I get better TDR and insertion loss results from > solder-mask covered microstrip transmission lines than from otherwis

Re: [time-nuts] HP 5065A super

Hi > On Feb 23, 2018, at 4:23 PM, Attila Kinali wrote: > > Hoi Bob, > > On Thu, 22 Feb 2018 21:58:09 -0500 > Bob kb8tq wrote: > >> The same nickel plating effect gets into a lot of things. If you are >> shopping for very >> low IMD connectors, nickel plating is out. Things get non-linear (t

Re: [time-nuts] HP 5065A super

Hoi Bob, On Thu, 22 Feb 2018 21:58:09 -0500 Bob kb8tq wrote: > The same nickel plating effect gets into a lot of things. If you are shopping > for very > low IMD connectors, nickel plating is out. Things get non-linear (to a very > slight > degree) when it is present. If -180 db is the goal

Re: [time-nuts] HP 5065A super

Keep in mind that soldermask will also change the field distributions around a microstrip line, and will somewhat mitigate the microstrip's dispersive behavior as well. I once worked with some miccrostrip couplers at around 2-4 GHz and found that directivity was significantly improved by adding tw

Re: [time-nuts] HP 5065A super

Hi The same nickel plating effect gets into a lot of things. If you are shopping for very low IMD connectors, nickel plating is out. Things get non-linear (to a very slight degree) when it is present. If -180 db is the goal for those spurs, you might only hit -120 db with the nickel connector

Re: [time-nuts] HP 5065A super

On 2/22/18 12:29 PM, Leo Bodnar wrote: Here is ENIG fact that is not widely known at the moment but which some might find useful. I could not understand why I get better TDR and insertion loss results from solder-mask covered microstrip transmission lines than from otherwise identical microst

Re: [time-nuts] HP 5065A super

It appears that ENIG gold is extremely thin (2 - 8 microinches), and if so does not cause a solderability problem. -- Tom, N5EG On Thu, Feb 22, 2018 at 3:18 PM, Mark Goldberg wrote: > My reading of IPC J-STD-001F Paragraph 4.5 says that the gold embrittlement > issue does not apply to ENIG or

Re: [time-nuts] HP 5065A super

My reading of IPC J-STD-001F Paragraph 4.5 says that the gold embrittlement issue does not apply to ENIG or ENEPIG. Paragraph 4.5.1 does say other gold shall be removed so there won't be solder embrittlement. Is that still correct? The issue with ENIG and RF is interesting. I have not heard that

Re: [time-nuts] HP 5065A super

In general it's bad practice to gold plate SMT solder pads. The reason is that proper SMT soldering utilizes a very small amount of solder and the gold plating will partially dissolve into the molten solder. Because of the small amount of solder, the percentage of gold will be high enough to embri

Re: [time-nuts] HP 5065A super

Here is ENIG fact that is not widely known at the moment but which some might find useful. I could not understand why I get better TDR and insertion loss results from solder-mask covered microstrip transmission lines than from otherwise identical microstrips on the same substrate with soldermas

[time-nuts] HP 5065A super

Yes, have the board done with ENIG gold. It typically adds around $15 per run of boards. I do all my boards with ENIG gold... if for no other reason than the gold color makes it very easy to determine when your solder paste properly covers the pads. And, as Charles mentioned, the quality and

Re: [time-nuts] HP 5065A super

On Thu, 22 Feb 2018 15:33:50 + "Poul-Henning Kamp" wrote: > >Then i would go for the LTC6240HV with a +/-5V power supply. > > Offset voltage (stability) is a, if not the, *very* important > parameter for the integrator. That's another reason to choose the LTC6240 over the LT1793. Beside the

Re: [time-nuts] HP 5065A super

In message <20180222160256.68d832a88fc2d7da91602...@kinali.ch>, Attila Kinali w rites: >Ah.. this looks significantly different than my 5065 service manual shows. > >So, I guess you want to build a new board that replaces this? > >Then i would go for the LTC6240HV with a +/-5V power suppl

Re: [time-nuts] HP 5065A super

On Thu, 22 Feb 2018 09:24:53 -0500 ew via time-nuts wrote: > Attached the schematic of the A9 my file of the picture is to large it is the > integrator. Ah.. this looks significantly different than my 5065 service manual shows. So, I guess you want to build a new board that replaces this? The

Re: [time-nuts] HP 5065A super

Hi The control loop (of which A9 is a part) ultimately locks the OCXO in the 5065 to the Rb transition. Gain in the control loop suppresses the noise of the OCXO, making it’s ADEV better than it would have been stand alone. Ok so far? Bob’s not off the tracks (yet)? The various processes th

Re: [time-nuts] HP 5065A super

Attached the schematic of the A9 my file of the picture is to large it is the integrator. I just gave Corby my extra A12  RVFR that at one time I was going to do something along the way you suggested but age and the number of projects on our list have ought up with reality. Remember when you vis

Re: [time-nuts] HP 5065A super

Ais the LT1793 the best choice the time constant is 0.05 seconds with a 10 K resistor and 5 uF Capacitor Bshould we add resistors and decoupling on the + - 15 volt op amp supplies CGold plating the edge connecter, does any one know a reasonable source, or is doing it at home an opti

Re: [time-nuts] HP 5065A super

On Thu, 22 Feb 2018 07:00:54 -0500 ew via time-nuts wrote: > Now a step by step work over, including HP mods for later  units like > replacing the 74196’s in the synthesizer module with 74LS196. May have been > end of life of the 74196. With some slight change of the circuit, you should be abl

[time-nuts] HP 5065A super

In December I lucked out buying a HP5065A for a very reasonable price, as is not tested. Turns out it was not working and I was not able to fix it. Corby to the rescue. Corby and I have shared many projects over the past, go back over 15 years, as a matter of fact he introduced me to time-nuts.

[time-nuts] HP 5065A - Some OP-Amp, FB and teflon stand off questions...

Ulf, Be careful if you are going to duplicate the new style A9 for use in a chassis that was built for the old style! On the old style chassis one of the resistors is mounted on the rear of the front panel loop switch. This resistor is mounted on the A9 module for the new style chassis. Which t

[time-nuts] HP 5065A - Some OP-Amp, FB and teflon stand off questions...

About to start repairing a second 5065A. Gathering parts. 1. Looking for a replacement for the still available but very expenceive OPA111 used in later versions A9 Integrator of the HP5065A. There are indeed some candidates at Digi-Key, but when the selection of max Input current, offset volta

Re: [time-nuts] HP 5065A repair...

That's great. Another old HP box brought back to life. -pete On Sun, Jul 30, 2017 at 4:24 PM, paul swed wrote: > Ulf very good and great to hear. I did look at the clock motor driver and I > believe you can use a ttl flip flop to drive the two transistors just fine. > I think the ttl will run

Re: [time-nuts] HP 5065A repair...

Ulf very good and great to hear. I did look at the clock motor driver and I believe you can use a ttl flip flop to drive the two transistors just fine. I think the ttl will run on the 4.2 V. But the transistor drive requirements look reasonable. So if you want the click click you can have it. Regar

[time-nuts] HP 5065A repair...

After having salvaged an old 5065A that was decomissioned in 1987 due to Rubidium cavity heater short circuit, I have now, several weeks later eventually managed to what I think repair it. Using a GPS-Diciplined HP105A as oscilloscope trigger, the 5MHz O/P is absolutely still. "Continous Operatio

Re: [time-nuts] HP 5065A High-Res Schematics?

Hi Tom, Yes, I hope to get a hard copy eventually, but even with a hard copy, a good OCRed soft copy is useful. After all, you can't do a search on a hard copy. And if you're away from home, even if just across town, lugging manuals along is rarely appropriate. I'm familiar with Dave's man

Re: [time-nuts] HP 5065A High-Res Schematics?

still offer them on eBay, or perhaps there's a special deal for time-nuts. /tvb - Original Message - From: "Ed Palmer" To: "Discussion of precise time and frequency measurement" Sent: Wednesday, July 05, 2017 3:36 PM Subject: [time-nuts] HP 5065A High-Res Sc

[time-nuts] HP 5065A High-Res Schematics?

Does anyone have clean high-res one-piece scans of the fold-out pages for the HP 5065A Rb Standard? I'm 'upgrading' my soft copy of the manual with full, edited OCR & bookmarks but the only copies I can find are either low-res or chopped into pieces. I've tried to splice the pieces together,

Re: [time-nuts] hp 5065A

2016 10:47:55 -0700 Subject Re: [time-nuts] hp 5065A On 10/29/2016 9:42 AM, John Ponsonby wrote: > Gentlemen, > I am interested in getting an old hp 5065A Rubidium frequency standard working again. I recall that if one of these units is left not running for a long time that the rubidi

Re: [time-nuts] hp 5065A

On 10/29/2016 9:42 AM, John Ponsonby wrote: Gentlemen, I am interested in getting an old hp 5065A Rubidium frequency standard working again. I recall that if one of these units is left not running for a long time that the rubidium atoms get adsorbed onto the glass of the cell and filte

[time-nuts] hp 5065A

Gentlemen, I am interested in getting an old hp 5065A Rubidium frequency standard working again. I recall that if one of these units is left not running for a long time that the rubidium atoms get adsorbed onto the glass of the cell and filter. I recall long ago having a note as to how t

Re: [time-nuts] HP 5065A questions

Thanks for the link to those handy documents, Luciano. I have a serial 1420A that I plan on resurrecting once my lab is built. Since seeing the capacitor warning, I checked it just now and sure enough, 1 capacitor had vomited on the PCB, so I've removed it and cleaned the PCB ready for replaci

Re: [time-nuts] HP 5065A questions

To "time-nuts" time-nuts@febo.com Cc Date Sun, 25 Sep 2016 18:42:50 -0700 Subject [time-nuts] HP 5065A questions Hello time-nuts, I have recently had the opportunity to play with an HP 5065A rubidium standard and have some questions. This unit has been powered down for

Re: [time-nuts] HP 5065A questions

Hi, On 09/26/2016 04:04 AM, Richard (Rick) Karlquist wrote: On 9/25/2016 6:42 PM, Skip Withrow wrote: 1. What the heck is rubidium cell flooding, and how does the TEC in the 5065A fix this problem? None of the -many- rubidium oscillators that I have been inside before has a TEC, and I have ne

Re: [time-nuts] HP 5065A questions

On 9/25/2016 6:42 PM, Skip Withrow wrote: 1. What the heck is rubidium cell flooding, and how does the TEC in the 5065A fix this problem? None of the -many- rubidium oscillators that I have been inside before has a TEC, and I have never seen the subject addressed. The manual suggests that it ma

[time-nuts] HP 5065A questions

Hello time-nuts, I have recently had the opportunity to play with an HP 5065A rubidium standard and have some questions. This unit has been powered down for quite a long time, it appears to be almost working. I can see both the 137Hz and second harmonic signals but they seem very low. In the man

Re: [time-nuts] HP 5065A

EV out to say 1 secs (low ^-13). > > Lars > > Från: Bob Camp<mailto:kb...@n1k.org> > Skickat: den 14 mars 2016 02:01 > Till: Discussion of precise time and frequency > measurement<mailto:time-nuts@febo.com> > Ämne: Re: [time-nuts] HP 5065A repair >

[time-nuts] HP 5065A

been useful to get the ADEV out to say 1 secs (low ^-13). Lars Från: Bob Camp<mailto:kb...@n1k.org> Skickat: den 14 mars 2016 02:01 Till: Discussion of precise time and frequency measurement<mailto:time-nuts@febo.com> Ämne: Re: [time-nuts] HP 5065A repair Hi Some math: 5

Re: [time-nuts] HP 5065A

secs (low ^-13). Lars Från: Bob Camp<mailto:kb...@n1k.org> Skickat: den 14 mars 2016 02:01 Till: Discussion of precise time and frequency measurement<mailto:time-nuts@febo.com> Ämne: Re: [time-nuts] HP 5065A repair Hi Some math: 5x10^-11 over 50C You have 1x10^-13 / C If you have

Re: [time-nuts] HP 5065A

In message , KA2WEU--- via time-nuts writes: >In my closet I found one of these, any merit to play with it ? I'm having oodles of fun with mine :-) http://phk.freebsd.dk/hacks/HP5065A/index.html -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [time-nuts] HP 5065A repair

PSDO´s just out of curiosity. In hold mode it > have been useful to get the ADEV out to say 1 secs (low ^-13). > > Lars > > Från: Bob Camp<mailto:kb...@n1k.org> > Skickat: den 14 mars 2016 02:01 > Till: Discussion of precise time and frequency > measurement

Re: [time-nuts] HP 5065A repair

quency measurement<mailto:time-nuts@febo.com> Ämne: Re: [time-nuts] HP 5065A repair Hi Some math: 5x10^-11 over 50C You have 1x10^-13 / C If you have pretty good HVAC you get 2C cycles. On a typical home system, you get 2X that or more. Net is a bump at 2x10^-13 (or more). That assumes n

Re: [time-nuts] HP 5065A repair

Hi Some math: 5x10^-11 over 50C You have 1x10^-13 / C If you have pretty good HVAC you get 2C cycles. On a typical home system, you get 2X that or more. Net is a bump at 2x10^-13 (or more). That assumes no hysteresis. (Hint: there always is hysteresis). That assumes you have no rate depe

Re: [time-nuts] HP 5065A repair

In message , cdel...@juno.com writes: >As far a tempco goes, unless your lab swings tens of degrees will you >really see it? Well, I do... My air-con is far from optimal, but it clearly makes a very obvious bump in my AVAR plots. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.2

[time-nuts] HP 5065A repair

I'm changing the topic from best rubidium frequency standard for this post. Most repairs I make to the 5065A run well below $250.00, sometimes as low as $100.00. A "crazy bad" repair might run $400.00 or so but out of over 50 repairs only two needed that level of help. As far a tempco goes, unle

Re: [time-nuts] HP 5065A flaws and improvements

In message , Bob Camp writes: >> That's the first I've heard of any drawbacks to the 5065. Can you give >> more details on this? > >The manual talks about a 5x10^-11 temperature stability over 0-50C. >Various members have reported data that suggests a stability about >10X worse than this

Re: [time-nuts] HP 5065A flaws and improvements

In message , Stewart Cobb writes: >The "as delivered" implies that there may be improvements available? Any >details on improvements? I'm currently working on the PSU and C-field circuits, there is some room for improvements there: http://phk.freebsd.dk/hacks/HP5065A/index.html

Re: [time-nuts] HP 5065A flaws and improvements

Hi > On Mar 12, 2016, at 4:56 PM, Stewart Cobb wrote: > > Bob Camp wrote: > >> The 5065 has great ADEV numbers. >> In “as delivered” condition it has horrid >> TC and pressure sensitivity. > > That's the first I've heard of any drawbacks to the 5065. Can you give > more details on this? The

[time-nuts] HP 5065A flaws and improvements

Bob Camp wrote: > The 5065 has great ADEV numbers. > In “as delivered” condition it has horrid > TC and pressure sensitivity. That's the first I've heard of any drawbacks to the 5065. Can you give more details on this? The "as delivered" implies that there may be improvements available? Any det

Re: [time-nuts] HP 5065A Start-Up

> Microphonics. > > What's the norm here? I see it in the 2nd harmonic level on the panel > meter. It runs about 20 normally, but a pretty light tap (with my > fingernail) anywhere on the instrument can peg the meter for a few > seconds. While I had the scope on A8 TP2 / TP3 (showing the off-re

Re: [time-nuts] HP 5065A Start-Up

Jim, > Except... > > Microphonics. > > What's the norm here? I see it in the 2nd harmonic level on the panel > meter. It runs about 20 normally, but a pretty light tap (with my > fingernail) anywhere on the instrument can peg the meter for a few > seconds. While I had the scope on A8 TP2 / TP3

[time-nuts] HP 5065A Start-Up

Turns out there have really just been two major issues so far with this new-to-me instrument. As I noted a few days back the pots on the A3 multiplier were intermittent, and twiddling them a bit got the instrument to lock up. But it was off by about 77E-10. The mag field control had no effect.

Re: [time-nuts] HP 5065A battery pack

Hi If you are running inside a facility with backup power, the couple of seconds between lights out and generators on is something that does need to be handled. If the frequency standard cruises through the event, it’s probably ok for the rest of the gear here and there to restart. Waiting for

Re: [time-nuts] HP 5065A battery pack

On 11/21/2015 6:13 AM, Bob Camp wrote: Hi The key issue is that there has been a lot learned about charging batteries since the 5065A was designed. Just as other parts of the 5065 can be improved with some work, so can the battery charger. Given that NiCad’s aren’t cheap, it’s worth noting that

Re: [time-nuts] HP 5065A battery pack

In message <77d0b0cc-a230-47d8-af0b-772aec876...@n1k.org>, Bob Camp writes: >The key issue is that there has been a lot learned about charging batteries >since the 5065A was designed. While that is true, NiCd is almost the most robust battery chemistry out there, so even with the rather

Re: [time-nuts] HP 5065A battery pack

Hi The 5065A has a nice connector on the back for an external DC supply Rather than doing anything inside the box, I’d do a battery pack outside the unit. If you have multiple devices you want to run on battery - do they also have DC inputs? If not can a DC input be added with minimal damage t

Re: [time-nuts] HP 5065A battery pack

Hi The key issue is that there has been a lot learned about charging batteries since the 5065A was designed. Just as other parts of the 5065 can be improved with some work, so can the battery charger. Given that NiCad’s aren’t cheap, it’s worth noting that the circuit could be worked on *before* s

Re: [time-nuts] HP 5065A battery pack

In message <5650469b.1040...@rubidium.dyndns.org>, Magnus Danielson writes: >Lacking the charging controller in mine, what would be a good approach >to go about and build one? A Mascot lead-acid charger and two VRLAs :-) >Need to replace the battery setup in my XSRM setup too, the pack

Re: [time-nuts] HP 5065A battery pack

Hi, Lacking the charging controller in mine, what would be a good approach to go about and build one? Need to replace the battery setup in my XSRM setup too, the packs I installed is now dead. Tempted to think in terms of LiFePO. Cheers, Magnus On 11/21/2015 03:45 AM, Dan Rae wrote: On 1

Re: [time-nuts] HP 5065A battery pack

On 11/20/2015 4:54 PM, Bob Camp wrote: Hi I don’t in any way doubt your count. If indeed they are putting 21 cells into that circuit, the NiCads likely don’t last as long as they might with a different charging circuit …. Bob Bob, I was answering Corby's query; mine had an original -hp- batt

Re: [time-nuts] HP 5065A battery pack

ld like. Thanks. Joe -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Friday, November 20, 2015 6:54 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5065A battery pack Hi I don’t in any way doubt your co

Re: [time-nuts] HP 5065A battery pack

Hi I don’t in any way doubt your count. If indeed they are putting 21 cells into that circuit, the NiCads likely don’t last as long as they might with a different charging circuit …. Bob > On Nov 20, 2015, at 3:56 PM, Dan Rae wrote: > > On 11/20/2015 10:52 AM, cdel...@juno.com wrote: >> Any

Re: [time-nuts] HP 5065A battery pack

On 11/20/2015 10:52 AM, cdel...@juno.com wrote: Any one know how many cells went into the HP 5065A battery packs? 21 Corby, in three rows of seven, from my notes when I re-celled mine. Dan ___ time-nuts mailing list -- time-nuts@febo.com To unsubscri

Re: [time-nuts] HP 5065A battery pack

Hi Corby: You could guess if you know the nominal pack voltage (divide that by 1.2 Volts/cell) or if you know the interior dimensions I might be able to see what fits. Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www

Re: [time-nuts] HP 5065A battery pack

Hi Well, the charger brings the stack up to about 33V (34.8V CR7 minus 1.4V in Q5 and Q4). Since they are NiCad’s that sort of limits the choices in stack size. Best bet (and a nice round sounding number) is 24 cells. That would 1.375V per cell which is just below the “standard” 1.41 V float vo

[time-nuts] HP 5065A battery pack

Any one know how many cells went into the HP 5065A battery packs? Thanks, Corby ___ 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.

Re: [time-nuts] HP 5065A with Patek clock on eBay

Hi Corby: What frequency input does the clock use? Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html cdel...@juno.com wrote: Hi, I've just listed an HP 5065A on eBay, item # 321719923791

[time-nuts] HP 5065A with Patek clock on eBay

Hi, I've just listed an HP 5065A on eBay, item # 321719923791 Cheers, Corby ___ 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] HP 5065A questions

Joe, Your unit could be a 916 prefix with the newer physics package and 10811 added as retrofits. Look at the top of the A3 module, what is the series number? Also look at the A9 op-amp module, does it have a Epoxy block op-amp or a transistor can style op-amp? What serial number is penciled in

Re: [time-nuts] HP 5065A questions

Joe a very nice find. The light won't change to lock unless you toggle the little switch inside the cover on the left to reset. Its intended to be that way so that you know you lost lock Regards Paul WB8TSL On Fri, Feb 6, 2015 at 7:16 AM, Joe D'Elia wrote: > writes: > > > > Joe, > > > > Nice f

Re: [time-nuts] HP 5065A questions

On 2/6/2015 4:16 AM, Joe D'Elia wrote: I shall see if I can find something of the same vintage that uses the same top and bottom covers and side rails that I can cannibalize to fix this unit. Joe, You may find the side panels / handles castings since they are common to a lot of that vintage -

Re: [time-nuts] HP 5065A questions

writes: > > Joe, > > Nice find. > > Don't worry about the lamp, they VERY seldom fail. > > Of course there are electronics failures that crop up. > > What color is your physics package? > > Blue paint= old style > Olive green paint = mid production > Silver (no paint) = late production > >

[time-nuts] HP 5065A questions

Joe, Nice find. Don't worry about the lamp, they VERY seldom fail. Of course there are electronics failures that crop up. What color is your physics package? Blue paint= old style Olive green paint = mid production Silver (no paint) = late production Also can I get your units serial number fo

Re: [time-nuts] HP 5065A questions

Joe, Using the front panel, turn the knob and notate the readings for all locations, we can help you from there. Cheers, Magnus On 02/05/2015 06:01 PM, Joe D'Elia wrote: Whilst mainly a voltnut I have often turned to this forum for answers on the telecom sourced rubidium oscillators and have

[time-nuts] HP 5065A questions

Whilst mainly a voltnut I have often turned to this forum for answers on the telecom sourced rubidium oscillators and have two units that I use for keeping my counters honest. However recently I was browsing in the scrap/redundant shelves at a local calibration lab and came across an HP5065A carcas

[time-nuts] HP 5065A with Patek Philippe analog clock coming up for sale

Thought I'd give a "heads up" concerning a nice HP 5065A that I will be offering for sale in the near future. It has the Patek Philippe analog clock and is in pretty good condition. Fully checked out and aligned! Plot against a Hydrogen Maser looks great and beats the original HP specs handily. Com

Re: [time-nuts] HP 5065A serial number list

Corby, my 5065A has s/n 2816A01605 John W Cress K0GCJ -- Original Message -- From: To: time-nuts@febo.com Subject: [time-nuts] HP 5065A serial number list Date: Tue, 31 Dec 2013 10:57:33 -0800 As promised here is a list of all the HP 5065A units I have come across. I

Re: [time-nuts] HP 5065A serial number list

Hi Corby, Thanks much for your effort to accumulate all this history, as well as improving on the original design. /tvb - Original Message - From: To: Sent: Tuesday, December 31, 2013 10:57 AM Subject: [time-nuts] HP 5065A serial number list > As promised here is a list of all

[time-nuts] HP 5065A serial number list

1420A00658 ___ 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] HP 5065A serial number list

As promised here is a list of all the HP 5065A units I have come across. I believe there should be a 08xx prefix out there as the units first came out in the middle of 1968. I also think that the 2816A prefix is the last prefix used. Anyone have any others I can add to the list? Another tidbit, t

[time-nuts] HP 5065A info

Hi, Thanks for the replies on the HP 5065A serial numbers. Some have expressed an interest in my list of "known" HP 5065A SN. I'm getting it together and will post it soon. One tidbit is that SN prefixes of 0928-X and below did not have the TED installed. This makes de-flooding the cells m

[time-nuts] HP 5065A early and late serial numbers

Stan, I keep a record of the HP5065A serial numbers I come across. Just for fun I'm looking for the first and last units made! Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/t

[time-nuts] HP 5065A early and late serial numbers

Well it's that time again to ask HP 5065A owners if they have early or late SN units. If you have a unit with a SN below 916-00181 or above 2816A01697 please let me know. Merry Christmas and an accurate 1PPS to all! Corby ___ time-nuts mailing list -

[time-nuts] HP 5065A A-12 Module Needed

Hello Time Nuts - I have an older HP model 5065A Rubidium standard (s/n 1320A) and one of the heaters in the A-12 module, Rubidium Vapor Frequency Reference (aka "thermos bottle"), has failed. It appears that this is the only failed part in the entire unit, and is one part that simply cannot

Re: [time-nuts] HP 5065A change sheets

Corby my manual only covers up to 1908a Sounds like you have far newer info than me. Regards Paul WB8TSL On Thu, Apr 25, 2013 at 3:16 PM, wrote: > Hi Everyone, > > Does anyone have the change sheets that apply to the prefix 2816A. > > I only have the one that covers up to prefix 2740A. > > Than

[time-nuts] HP 5065A change sheets

Hi Everyone, Does anyone have the change sheets that apply to the prefix 2816A. I only have the one that covers up to prefix 2740A. Thanks, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailm

Re: [time-nuts] HP 5065A short term stabilities, update

ssage - From: To: Sent: Wednesday, January 02, 2013 8:18 AM Subject: [time-nuts] HP 5065A short term stabilities, update > > > A few years ago I posted the short term stabilities of some HP 5065A. > Here is an updated list with some more results. The 1 sec figures > with a * ind

[time-nuts] HP 5065A short term stabilities, update

A few years ago I posted the short term stabilities of some HP 5065A. Here is an updated list with some more results. The 1 sec figures with a * indicate a maximum. The actual 1 sec results for those units will be better. The 1340A unit was exceptional! 1 SEC.

Re: [time-nuts] HP 5065A optical unit PIX

I agree with the previous comment and will be ready to jump into my 5065 when it has trouble. (I hope never) Thanks. Paul WB8TSL On Sun, Dec 23, 2012 at 12:09 PM, Edgardo Molina wrote: > Thank you so much for sharing! This is the cherry on top of the cake for > HP-5065 lovers ;o) > > I treasure

Re: [time-nuts] HP 5065A optical unit PIX

Thank you so much for sharing! This is the cherry on top of the cake for HP-5065 lovers ;o) I treasure the goodwill to share. This is how the learning process has taken place for centuries. Happy holidays from Mexico. Sincerely yours, Edgardo Molina Dirección IPTEL www.iptel.net.mx T :

[time-nuts] HP 5065A optical unit PIX

Merry Christmas everyone! I have taken some PIX of a disassembled HP 5065A optical unit for your pleasure! Tom Van Baak is hosting them at http://leapsecond.com/corby/5065a-optical/ Enjoy ___ time-nuts mailing list -- time-nuts@febo.com To unsubscr

Re: [time-nuts] -hp- 5065A battery pack

Hi I have no problem with restoring gear to it's original state. I mostly was wondering just how much time the considered "enough" back when the 5365 was made. There's been a bit of drift in things like that over the years. Sounds like in this case, not as much as in other areas. Bob On Dec 4

Re: [time-nuts] -hp- 5065A battery pack

But thats not HP. :-) I would agree that a external ups would be about the same price and for some of them you can slightly increase the battery size. There are a lot of surplus ones out there for a very few dollars. Shippings normally the bigger cost these days. Regards Paul. On Tue, Dec 4, 2012

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