Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

With a Rb we are talking loop time in excess of 20 minutes. Any thing other than digital is out of reach. To day I should get my second Rb and I will put it on aging test. The present one is better than 2 E-12 per month! I am still hoping some one else will do an independent test. Key is

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

Using a $ 2 G/A (socket included) and a $ 2 PIC, four will fit on a mini board and there are 3 boards to the order that is $ 5.17 per board. Board is laid out, waiting for uP pin assignment and will be able to deliver in a week board and G/A. Bert Kehren In a message dated 1/30/2012

Re: [time-nuts] Building a GPSDO trouble using Jupiter-T

What they do does not make any difference to us, what is important how often we have to change the tuning word to meet our requirements, and if we dither it will be an addition or subtraction from the center value. With out dither it would be 4 times a month on my unit. That will allow a

Re: [time-nuts] Thank you Tom and Rick MUST READ

Magnus I fully agree, regardless of the subject if it comes from you I read it and save it.. How ever we have clearly some new bees and this one write up is a nice introduction. Covers a lot of basic territory. Bert Kehren In a message dated 1/30/2012 4:18:27 P.M. Eastern Standard Time,

Re: [time-nuts] FE-.5680A trimming resolution

What do you think you would gain from that. Does the LEA-6T have a TCXO? Bert In a message dated 1/31/2012 10:53:22 A.M. Eastern Standard Time, att...@kinali.ch writes: On Mon, 30 Jan 2012 17:47:54 + Mark Sims hol...@hotmail.com wrote: The Tbolt does not have any sawtooth error

Re: [time-nuts] GPS SDR (was: FE-.5680A trimming resolution)

That is also what I like to understand, and when combined with a FE 5680A the time will be long and should be averaged over 100 if not 1000 samples, what is the advantage? Look at the error budget. Bert Kehren In a message dated 2/1/2012 2:04:04 P.M. Eastern Standard Time,

Re: [time-nuts] GPS SDR (was: FE-.5680A trimming resolution)

Being divorced and no children writing a large check is neither a problem nor a challenge. To me the challenge is to find solutions that are affordable and work for every body. Sadly there is very little interest or emphasis in this group on this. An example the $ 10 Loran C simulator

[time-nuts] FE 5680A purchase warning

ggg*fitting has two listings NEW and USED. Bought a NEW hoping to get a better unit. Based on tests unit has run at least three years. Also has dent on case.Recommend we stay away from this one. Is a marketing ploy. Will ship it back to day. There are other choices out there. Do not need to

Re: [time-nuts] New Rubidium Frequency Standard Group

My frustration is that there is very little information or discussion as to the performance of the device, ultimately some may want to use it in their shop as thee reference, and to make that possible more performance data would be nice. It may be the best they have. Bert Kehren In a

Re: [time-nuts] Rubidium Performance: DDS noise effect on 10 MHz

Maybe his are new. But I bought one from ggg*fitting that was listed as new turned out very used, and in conversation with them they had to admit they do not know what they have. If it still has its original factory setting, measuring the frequency will tell you if it had extensive running

Re: [time-nuts] Rubidium Performance

John Thank you for your effort. It would be nice if you could confirm the 4 to 5 Hz dither that seems to be the loop time constant and long term aging that will influence the GPS/Rb control loop time constant setting. I did see 1 E-12 per month which may be unique to that unit. Bert Kehren

Re: [time-nuts] FE-5680A's suitability for use as a 10 MHz reference for micr...

Use a MV89 or something like it and lock it to the 5680A with a 10 to 100 Hz analog filter. You will like the results at 10 GHz. Bert Kehrenn In a message dated 2/7/2012 12:48:57 P.M. Eastern Standard Time, tur...@ussc.com writes: Hello, As has been mentioned here before, the output of

[time-nuts] Recommendation

I know this is off subject but I had such a good experience with rdr-electronics and they list items like Rb’s and GPS receivers. I bid and won a GPS receiver for my FE 5680A, but based on previous questions they noticed I had bid on the wrong one, they informed me and asked which one I

[time-nuts] ebay warning

Just shipped my NEW FE5680A back to ggg*fitting,as you can se below they are in a hurry to resell it. It was very used with very high aging rate. Their NEW Morion MV89 is also not new. Be careful Bert Kehren HI Friend! Pls You as soon as possible shipping! hank you very

Re: [time-nuts] ebay warning

All I can say this guy is a crook he knows what he is doing, selling the same units as used and new. There are other choices. Beware Bert Kehren. In a message dated 2/21/2012 12:27:00 P.M. Eastern Standard Time, li...@rtty.us writes: Hi I just got a couple of FE's in from the same guy.

Re: [time-nuts] ebay warning

These guys do not know what they sell. This was a marketing ploy, I did catch him once before and made him change his listing. All a sudden he had used and new. Checked with him, claimed he ha d gotten some new ones bought one, looked very used took the back off, strong discoloration a give

Re: [time-nuts] Austron 2100F

Send me a picture direct to my email. I may have one. Bert Kehren In a message dated 10/22/2010 6:01:13 P.M. Eastern Daylight Time, as ma...@fc.up.pt writes: With an outboard +/- 12 Volt power source my 2100F is now working fine. A new replacement package is therefore desperately

Re: [time-nuts] Austron 2100F

Paul, Thanks for asking, I am doing fine. Growing up in Europe after the War I have a hard time throwing any thing away, resulting in too much stuff.. I would send it for the cost of shipping as I have done in the past for other things. Bert In a message dated 10/22/2010 9:58:33 P.M.

[time-nuts] RS Cesium

Does any one know which Oscilloquartz OCXO is in the RS XCS 299.4011.02 Cesium standard which looks similar to HP 5062C but uses a FTS tube and the actual CS module is from Oscilloquartz? Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com

[time-nuts] R-S Cesium standard

Does any one have any info on the RS cesium standard. Specifically does any one know what switch position 7 Integrator and position 8 Amplifier measure? Any help will be appreciated. Thank you. Bert Kehren ___ time-nuts mailing list --

Re: [time-nuts] R-S Cesium standard

Bill Thanks for the info. It is obviously RohdeSchwarz. Funny! All other units I have seen or owned did have a beam current reading, have not been able to find it on these units. Besides Voltages it has oven, contr. Voltage, integrator, AMPL. and 2nd Harmonic. I still have two cesiums and

Re: [time-nuts] Time of death-Again

Agreed, thank you Arnold. Bert Kehren In a message dated 10/28/2010 5:21:17 A.M. Eastern Daylight Time, arnold.ti...@gmx.de writes: Fellow time nut(s), isn't this not going too far, going to be disgusting and perhaps wounding feelings? No better things in mind? Could we stop this and

[time-nuts] HP 10811 EFC

I have in the past reversed the varactor, grounding R2 to get a positive tuning voltage from 1.5 to 12 Volt. Also brought out the 5.7 volt for reference purposes. That way every thing was positive. Is easy to get to. But now I have some very good units and I am worried I may change

Re: [time-nuts] HP 10811 EFC

Bob Thanks that is even better. I did not think of that. I can do that by swapping the leads at the board interface and stay away from the Osc. circuit itself. Will try that when I replace the OCXO of my FRK-H with a super 10811. Bert Kehren In a message dated 10/29/2010 8:37:13 A.M.

[time-nuts] Tbolt characterization

Has any one characterized the 1 pps output over time against a Maser? I think it makes an excellent GPS substitute, but actual data would be great. Thanks Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Comparing the frequency of two gpsdo's.

Hi I give up a 113.3 K picture attachment no text turns into 157 K. I tried. It is particular frustrating when seeing how much bandwidth is wasted with garbage that has nothing to do with time and frequency. Bert Kehren In a message dated 11/13/2010 2:14:04 P.M. Eastern Standard Time,

Re: [time-nuts] Comparing the frequency of two gpsdo's.

Thank you Will remember it. Thought I had stayed within the guidelines. Bert In a message dated 11/13/2010 3:45:21 P.M. Eastern Standard Time, j...@febo.com writes: Bert, I just approved your message, so it should show up soon. The reason for the size increase is that the

Re: [time-nuts] Frequency comparrison

Magnus I will keep it in mind, in the meantime it has been approved. But once every thing has been tested I will send it to you to post all the drawings, board and code for dissemination. Thank you. How did you come out on the Rb Bert In a message dated 11/13/2010 3:42:05 P.M. Eastern

Re: [time-nuts] Form factor

Hi One source of boxes to consider is old HP equipment, some is very reasonably priced, like 37203 for small boxes and a 59401A makes an ideal housing for a Rb with clock GPS and backup power. Some times you can even use part of the guts. I even went as far as repackaging my 5062C into a HP

Re: [time-nuts] Editing, nitpicking, and graciousness

Thank you Perrier, I could not say it any better. Right from my hart. My frustration along with the points so eloquently covered is that among some of the beat it to death responses there maybe be something worth wile that I have deleted, because I do not open all postings any more. Also some

Re: [time-nuts] Problems with Garmin - maybe we should cut them alittle slack

Happy New Year every one. It is not the GPS, it is clearly the database, and short of a detailed survey of every address there will be variations. As Google enhances it's database I am sure so will the Navigator sellers. We have come a long way and we are getting spoiled. Bert Kehren Miami

Re: [time-nuts] Comparing 10 MHz Oscillators at 10 GHz

Ulrich Strictly for adjusting and comparing two 10 or 5 MHz sources I use the circuit from the Austron 2110 that takes a 5 MHz input and through mixing generates 5.0005 MHz subsequently devided down to 1.0001 MHZ. Mixed with the other input at 1 MHz the resulting difference is 100 Hz which

Re: [time-nuts] Comparing 10 MHz Oscillators

Bob it is all there on the left are the inputs and the labels are missing because of the ring binder. Top does not have transformer because it is the internal reference. Can be replaced with the circuit below. Bert Kehren In a message dated 1/5/2011 1:52:29 P.M. Eastern Standard Time,

Re: [time-nuts] Looking for Tracor 599 VLF Receiver Manual

Paul, did you scan the manual? Bert In a message dated 1/5/2011 2:58:25 P.M. Eastern Standard Time, paulsw...@gmail.com writes: Al, Bert who is on this list is quite an expert. He has helped me. I have a pair of 599s One working the other so so. Several comments. Pretty sure that your 599

Re: [time-nuts] Looking for Tracor 599 VLF Receiver Manual

Arthur, you mention that the 204 can select 60 KHz by thumbwheel. Do you have a schematic of that synthesizer? I know they had a 60 KHz down converter I have modified my unit and in my TI days modified quite a few for our cal labs by setting the oscillator to 122 KHz dividing it by two and

[time-nuts] 10811 foam enclosure

Being a Shera Fan I finally broke down and bought a Tbolt. I experimented with a foam enclosure with roughly 1 centimeter on all sides. What I found that it only increased the board temperature by 19 C. It was still as sensitive to ambient. Thanks to Lady Heater it even shows an increase

Re: [time-nuts] 10811 foam enclosure

Thanks Poul-Henning makes sense Bert In a message dated 1/9/2011 11:06:34 A.M. Eastern Standard Time, p...@phk.freebsd.dk writes: In message 3150c.48e44656.3a5b1...@aol.com, ewkeh...@aol.com writes: Being a Shera Fan I finally broke down and bought a Tbolt. I experimented with a foam

Re: [time-nuts] 10811 foam enclosure

Graham, I have no problems with my 10811 I just want to experiment with ways to improve performance, right now I have several that are in the E-13 range between 1 and 100 sec and am getting greedy and looking for ways to improve one of them. Want to take it step by step and not degrade a

Re: [time-nuts] 10811 foam enclosure

Thanks for all the info. Agree after my tests on the Tbolt, that is why I will place large mass around it, will keep it close to ambient and move slowly. What is the zero G axis? Presently oven current is 65 mA down from 95 at room temp so I have room to go but I will monitor over ambient

Re: [time-nuts] 10811 foam enclosure

I use Alu extrusion that is used on commercial windows, got it twenty years ago, but they may still use it. Bert In a message dated 1/9/2011 3:09:19 P.M. Eastern Standard Time, mspencer12...@yahoo.ca writes: My experiences placing my thunderbolt board in various insulated containers

Re: [time-nuts] 10 MHz Oscillator comparison part II

List A while back I proposed the Austron 2110 circuit. No response. This is a straight forward circuit with the only critical component the 5.0005 MHz Xtal. I am sure there is in this group enough expertise to find a source and if enough sign up a one time buy could bring the total assembly

Re: [time-nuts] CS reservoir depletion

Having two HP CBT's minus enclosure sitting on my window sill, allow me to ad my two cents worth. Looking at the assemblies I see more art than science and duplicating something like that would most likely end in failure. Comparing that to the previous H Maser discussions the collective know

Re: [time-nuts] CS reservoir depletion

Thank you. Bert Kehren In a message dated 1/16/2011 12:03:53 P.M. Eastern Standard Time, hol...@hotmail.com writes: Baring any holdover events, the long term output of a properly configured tbolt should exceed any single cesium source or maser. If you assume the 1 PPS signal is

Re: [time-nuts] Achievable temperature stability for Thunderbolt

Looking at ways to optimize GPS-Rb-OCXO performance, using dewar, foam and fan cooling, using a fan was an eye opener. I have now come to the conclusion that for the temperature environment we are working in, a fan is the best way for all three. I am using a 5X5X1 cm fan drawing 50 mA at 12

Re: [time-nuts] Thunderbolt cooling vs heating for stability

Peltier takes to much power and generates more heat. A fan will work nicely. Bert Kehren In a message dated 1/18/2011 12:17:00 P.M. Eastern Standard Time, p...@petelancashire.com writes: Been getting ready to build a box for the t'bolt and instead of it all getting hotter to maintain a

[time-nuts] Austron 1150

Does any one have information on the Austron 1150 oscillator? I am considering using it as an offset oscillator for a dual mixer so Allan Deviation, aging and temperature stability would be of help. Thank you BertKehren ___ time-nuts

Re: [time-nuts] Austron 1150

Arthur I have the both, the screwdriver adjust only will probably make a good offset for the Dual Mixer. I just checked one, it tunes 3 Hz down and 1.5 Hz up In a message dated 2/1/2011 9:39:08 A.M. Eastern Standard Time, golgarfrinc...@yahoo.com writes: Does any one have information

Re: [time-nuts] Austron 1150

Thank you Allen, I think I have enough. Unless there are some more Allan Variance plots. Every thing else is well covered. Bert Kehren In a message dated 2/1/2011 4:06:58 P.M. Eastern Standard Time, alan.me...@btinternet.com writes: Hi Bert it is around I have a 1MHz version so I got the

Re: [time-nuts] Austron 1150

Sorry Alan for misspelling your name. Bert In a message dated 2/1/2011 4:06:58 P.M. Eastern Standard Time, alan.me...@btinternet.com writes: Hi Bert it is around I have a 1MHz version so I got the sheet from somewhere. I am just doing a sweep of my machine...it may be on an old disc..my

Re: [time-nuts] Thunderbolt Supply

I use a 16 Volt Laptop power supply followed by Low Noise LT1764A linear regulator for +12 and a 7805 for the logic. If you want to splurge use a LT1764A also for the +5.. To generate the -12V a Microchip TC962 followed by a 79L12 does a nice job. The +5 and -12 are not that critical. That

[time-nuts] Austron

Previously I asked about the Austron 1150 and got excellent information. How ever all data sheets I received show 28 Volt power requirement. My units have labels stating 12 to 28 Volt. Do these units have internal regulators or what should I look out for. Thanks Bert Kehren Miami

Re: [time-nuts] Thunderbolt Supply

That is basically what I do. Bert Kehren In a message dated 2/11/2011 11:44:56 P.M. Eastern Standard Time, namic...@gmail.com writes: One approach for the Tbolt is to use a low dropout low noise linear regulator (I used a LT1764 set to 11.5 volts) for the 12 volt input (it is within

Re: [time-nuts] Austron

Thanks Bill. I am heading right now to the Orlando Hamfest but will be on tomorrow. Bert In a message dated 2/11/2011 10:40:03 P.M. Eastern Standard Time, wb6...@cox.net writes: Bert, The data sheet I sent you has a number of possible factory voltage options indicated where the specs

[time-nuts] Attention Orlando Fl. time nuts

Just came back from Orlando Hamcom. Bought a brand new ATT unit with FRS and extra boards for $ 50. He has more. Contact me direct and I will help you find him. Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Thunderbolt Supply

Achim of course I am using Filters, among others the wide band inductors Radio Conrad offers. Contact me direct and I will send you sketches of what I do, including GPSDO with 10811. Where are you located? Bert In a message dated 2/13/2011 8:44:56 A.M. Eastern Standard Time,

Re: [time-nuts] Advanced 5 to 10 MHz doubler

Thank you Luciano for the circuit. It never fails. I got your message 1 minute!! after placing an order for PC boards. I would have loved to add it to this order, how ever I will lay it out and add it to the next run. Thanks again... Bert Kehren In a message dated 2/14/2011 5:35:12 A.M.

Re: [time-nuts] Advanced 5 to 10 MHz doubler

Luciano Please keep me posted, I will add it to the next run. Bert In a message dated 2/14/2011 6:35:40 A.M. Eastern Standard Time, luciano.paramithio...@hp.com writes: thankyou, sorry for time misalign. At the moment I am preparing my final version that will add an input low pass

Re: [time-nuts] Thunderbolt Supply

I use ferrite beads the old ones where the wire goes through a round cylinder five times I get them from Radio Conrad item # 50 21 97 36, 16 cents each and capacitors followed by regulators. The regulators are close to the Tbolt the rest is with the batteries and switchers. Works fine for

Re: [time-nuts] Tool Needed to Access my Timer Battery

You may find that if you left a battery in there you may have other problems. Having some expensive watches I leave that part up to an expert, take it to a watch repair place. Bert Kehren In a message dated 2/15/2011 2:43:52 P.M. Eastern Standard Time, stanw...@verizon.net writes:

[time-nuts] PM6654

Just became the owner of a PM6654 with a PM9691 OCXO. The OCXO looks interesting. I am not able to make it count but that could be operator problem. Any operator manual out there and what is known about the OCXO? Thanks Bert Kehren Miami ___

Re: [time-nuts] PM6654

Thank you. Bert In a message dated 2/16/2011 4:08:29 P.M. Eastern Standard Time, cadbl...@hotmail.com writes: Hi Bert, this should be a help: http://128.238.9.201/~kurt/manuals/manuals/Other/ cheers, ian From: ewkeh...@aol.com Subject: [time-nuts] PM6654 To: time-nuts@febo.com

Re: [time-nuts] PM6654

Thank you Bert In a message dated 2/16/2011 2:50:47 P.M. Eastern Standard Time, mag...@rubidium.dyndns.org writes: On 02/16/2011 06:18 PM, ewkeh...@aol.com wrote: Just became the owner of a PM6654 with a PM9691 OCXO. The OCXO looks interesting. I am not able to make it count but that

Re: [time-nuts] PM6654

Arthur, will check. Thanks Bert In a message dated 2/16/2011 2:24:12 P.M. Eastern Standard Time, golgarfrinc...@yahoo.com writes: Just became the owner of a PM6654 with a PM9691 OCXO. + The oscillator isn’t that bad. The specs say less than 5x10E-10 per day after 48hrs

Re: [time-nuts] SRS PRS10 problem

Like always they have them on ebay. I know most of you do not like them but they are for me the best source of obsolete parts. Bert In a message dated 2/16/2011 4:57:45 P.M. Eastern Standard Time, li...@rtty.us writes: Hi Since the unit is current production, the part should be around.

Re: [time-nuts] SRS PRS10 problem

MRF315 should also work Bert Kehren In a message dated 2/16/2011 5:37:49 P.M. Eastern Standard Time, ei6iz.bren...@gmail.com writes: Interestingly it was not your normal tin whisker (I have seen a few of those, just..) it was a substantial one that had grown out from the stack of 2

[time-nuts] Dual Mixer update

It is close to 18 month now that I first proposed a D/M for $200. Thanks to the help of Corby, Richard, Brian, Bob and Hubert I think it is very close to final release. The delay is mainly due to testing, not by the five mentioned above but by others, that did get kits under the condition

Re: [time-nuts] Enclosure for Thunderbolt

James I was strongly criticized in the past but again look at HP's half width cases like the HP 37203A, there are many instruments out there for next to nothing in that size case and it looks very professional. My Dual Mixer goes into one of those, and if you can not find one contact me

Re: [time-nuts] Earthquake meets time ball

Steve Living in South Florida and have had two Hurricane eyes actually going over my house I feel with you. Only difference, we have a warning and if so choose, can get out of the way. Bert Kehren Miami In a message dated 2/24/2011 5:12:52 A.M. Eastern Standard Time, sar10...@gmail.com

[time-nuts] VCXO help

As part of the D/M project the counter uses a 100 MHz VCO with an AD 4001 PLL. To simplify further I would like to consider a very simple VCXO, easily available components, no tuning, any ideas out there. For once phase noise is of no concern. Bert Kehren

Re: [time-nuts] VCXO help

Thanks for the info Fred The problem is the package. Looking at the Cirrus Logic CS 2300-CP and use a bubbler. Since I start out with 5 or 10 MHz there must be something out there that can be soldered. In a message dated 2/25/2011 7:17:42 A.M. Eastern Standard Time, tijddin...@yahoo.com

Re: [time-nuts] VCXO help

Thanks for the input, do not forget the total system cost has to be $200, the latest version has a simple VCO but I would like to eliminate component selection, may stay with the present design, but the Cirrus CS 2300 followed by a bubbler may be the answer. Maybe there is something like the

Re: [time-nuts] VCXO help

I need to multiply by 10 and 20, 670-2 can not multiply by 20.Thanks. Bert In a message dated 2/25/2011 8:03:55 A.M. Eastern Standard Time, tijddin...@yahoo.com writes: Well, I know Geraldo Lino de Campos on this list is using an ICS670-03 for this purpose. For me personally that part

Re: [time-nuts] VCXO help

English and fingers are not perfect and I did not check before I send it sorry about that Bert Kehren In a message dated 2/25/2011 10:50:03 A.M. Eastern Standard Time, tijddin...@yahoo.com writes: Pardon my ignorance, but what is a bubbler? Is that time-nut speak for a frequency

[time-nuts] HP 5061

Cleaning out an attic that I had not touched in ten years I found some HP 5061A manuals, HP 10811 manuals, AC and DC power cords, plastic feet and most the parts of a unit. If there is interest please contact me directly. Bert Kehren ___ time-nuts

[time-nuts] HP Parts and 5061

Based on some resposes some additional information. I have some new oval power cables HP used to use, I do not have any 10811 I want to part with, but I have a source where I bought mine for $100 and if contacted direct I will forward. Also I have some 10544A' with power supply boards and a

[time-nuts] Low noise power supply

There is an interesting article in the March 2011 Electronic Products magazine design an ultra low noise supply for analog circuits. It is a combination of switcher and LDO's and written by P Hunter TI so it may also be available on their site. Bert Kehren

[time-nuts] FRS

On one of my older FRS I tightened the cover to much blowing in the process the TIP 31 and the 2N4021. Any idea where to get a 2N4021 or what would be a substitute. Thanks Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,

Re: [time-nuts] FRS

Thank you, yes it is a 2N4091, my fingers are getting bad. I think I am going to try a TIP122, I have plenty of TIP31C's, to much trouble and money for a single 2N4091 when you take into consideration the age of the unit and lamp voltage shows 6 volt. Bert Kehren In a message dated

[time-nuts] Mail Fraud

Having only been a member for two years I have always considered this group to be of character in more ways than one. That is why I have never asked for money up front before shipping even when I send a HP 5061 A to the UK and D/Ms to New Zealand and Germany. Sadly to say I have now to

[time-nuts] Mail Fraud

Did get an email from Scot this afternoon, payment is on its way. Items where shipped two weeks ago. Bert Kehren ___ 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] Thunderbolt vs Motorola M12+T

I also would like to know the answer to that question if you use the 1 PPS of the Tbolt versus the M12 or maybe a later model affordable GPS engine. Bert Kehren In a message dated 3/16/2011 11:18:23 P.M. Eastern Daylight Time, albertson.ch...@gmail.com writes: On Wed, Mar 16, 2011 at

[time-nuts] Clean up

Still finding stuff. Manuals for Austron 2010B, FTS 4000/5000, FTS4500 and a control Panel for the FTS4500. Please contact me direct. Bert Kehren Miami ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] WWVB Measurements

Living in Miami probably as far away as possible in the continental US I have no problem receiving WWVB. When I moved here in 1993, 60 KHz was my main reference source. I used a Tracor 599 and a HP 117 along with a 4 foot commercial loop. The 599 showed clearly superior performance. Later

Re: [time-nuts] Help needed in Seattle with HP 8620C and 86242D Sweep Oscilla...

Pete, contact me direct, I am in Miami but I may be able to talk you through it. If you do it to sell, check prices first, they do not get much money now a days. I did recently salvaged some. Bert In a message dated 4/4/2011 12:57:54 A.M. Eastern Daylight Time, pet...@standingwave.org

Re: [time-nuts] Portable standard

Joe Having OCXO's, Rb's, Tbolt's and a Cs running with battery backup, over time I have used AGM, Ni-CAD, and now Ni-MH,, in all cases you have to have ventilation. Also battery and electronics have to be separated as much as possible since temperature is enemy #1 for any battery. Today most

Re: [time-nuts] Portable standard

Sorry to confuse. Pulse was the wrong word. What I was trying to say is that during the charge mode the charge controller does interrupt the charge process to check battery voltage. Since English is my third language please forgive me. Bert Kehren In a message dated 4/6/2011 7:04:36 A.M.

Re: [time-nuts] Housing LPRO and Thunderbolt together

Having over years looked down at Thunderbolt using GPS/Shera/Rb's and Cesium Standards I finally broke down and bought a Tbolt when there where some available for a day for $75. Decided at that price I can not go wrong. Now my counters, Spectrum Analyzer and all Sig. Generators are fed by

[time-nuts] ZAPD-3DB-1675-3

I am considering using the ZAPD-3DB for GPS distribution. Any information available before I do something stupid? Thanks Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Correction it is a ZAPD-3DB-1575-3

Getting my glasses out it is a 1575-3 Thanks for the correction. Bert Kehren ___ 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] Strange temperature peak

I have seen it, as a matter of fact two days ago I did see a straight jump in excess of 1 C. I have seen it before. I do not monitor constantly, but will keep an eye out. Bert Kehren In a message dated 5/27/2011 3:19:46 P.M. Eastern Daylight Time, dib...@usa.net writes: On 5/27/2011

Re: [time-nuts] locate 6 digit digital clock

I have a good supply of MM5314N chips so all my clocks are based on the chip. But I always wondered why as long as I have been on the list no one has developed a LCD or LED unit using a PIC or other controller chip along with a board. Is there no interest? Bert Kehren Miami In a message

Re: [time-nuts] Thunderbolt no usable sats.

the -12 VDC is also used by the OCXO as tuning voltage! Bert Kehren In a message dated 6/12/2011 6:05:01 A.M. Eastern Daylight Time, golgarfrinc...@yahoo.com writes: I bougth an Thunderbolt off E-bay some time ago, to use as reference for my spectrum analyzer and signal generators. I

Re: [time-nuts] Lyttleton Time Ball completly collapsed

I do not think this is funy. Bert Kehren In a message dated 6/14/2011 4:29:07 P.M. Eastern Daylight Time, time-nuts-m...@tenpierick.com writes: Pity... Hopefully no one was working on the dismantling when nature decided to help. Soon on eBay - Slightly used timeball - local pickup

Re: [time-nuts] How accurate are cheap radio controlled clocks?

I have one of my Junghans Mega next to my computer and use it for ebay bidding and it is always better than a second.Bert Kehren In a message dated 6/26/2011 10:23:16 A.M. Eastern Daylight Time, david.kir...@onetel.net writes: On 06/26/11 07:25 AM, David J Taylor wrote: I've got

Re: [time-nuts] FE-5680A software calibration units ?

Depends on who you got it from Sent from Samsung tabletNick Sayer via time-nuts wrote:When I got it, the setting was zero. That suggests to me that the factory tuning was erased, assuming that the factory tunes it the same way - by changing the value adjusted by that

Re: [time-nuts] Tbolt issues

Know all that that is why we decided not to do it. Not knowing all the ins and outs and limits of the Tbolts that is why I asked the question to begin with Bert Kehren Sent from Samsung tabletCharles Steinmetz wrote:Bert wrote: > On our to do list was temperature

Re: [time-nuts] hm H Maser

Do we know what the PHM development for Galileo cost? Sent from Samsung tabletBob Camp wrote:Hi > On Jan 10, 2017, at 2:45 AM, Dr. David Kirkby (Kirkby Microwave Ltd) > wrote: > > Once 9 Jan 2017 12:59, "Bob Camp" wrote: >>

Re: [time-nuts] OCXO inside the FEI AN/URQ-23

Thanks I have 2. Will run some tests. In my opinion ADEV does hide changes in Frequency and we see it when we compare ADEV plots with at the same time frequency measurements. We see it with your plots on the Tbolt. The URQ shows frequency specs 2E-12 most likely ADEVBert Sent from my Galaxy

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

Having  had a fan failure on a well insulated Rb we use a temperature sensor also used for compensation in to a PIC to shut down the systemBert Kehren Sent from my Galaxy Tab® A Original message From: "David G. McGaw" Date: 5/10/17 11:20 PM

Re: [time-nuts] Anyone using UBLOX LEA-M8F for GPSDO?

Neil we  have used M7 and I have boards contact me off list toBert Kehren  Sent from my Galaxy Tab® A Original message From: Neil Smith G4DBN Date: 5/10/17 4:03 PM (GMT-05:00) To: Discussion of precise time and frequency measurement

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