Re: [time-nuts] New GNSS chipsets

had much influence, but I at least try to advocate for it > to become a good market, so hopefully it will be affordable. It has > actually been affordable for quite some time, so going multifrequency > should be the next step and with that the benefits. > > Cheers, > Magnus

Re: [time-nuts] New GNSS chipsets

mous vehicles. If > you are GM or Toyota, > they will gladly support you. For the rest of us …. go to the back of the > line ….. That’s been the pattern > on this stuff like this for quite a while. > > Bob > > > On Apr 1, 2018, at 1:04 PM, Joseph Gray <jg...@zianet.com> wrote:

Re: [time-nuts] New GNSS chipsets

On Sun, Apr 1, 2018 at 3:15 AM, Magnus Danielson <mag...@rubidium.dyndns.org > wrote: > Hi Joe, > > On 03/31/2018 01:16 PM, Joseph Gray wrote: > > I've been reading announcements by Broadcom, uBlox and ST Micro for new > > chipsets that will use L1, L2, L5 to provide

[time-nuts] New GNSS chipsets

I've been reading announcements by Broadcom, uBlox and ST Micro for new chipsets that will use L1, L2, L5 to provide significantly more precise positioning for every day applications like cell phone, autonomous vehicles, UAV, etc. Broadcom is claiming 30 cm, uBlox just says "centimeter level". The

[time-nuts] TADD-1 question

I have a sig gen that uses a single BNC for input/output of the 10 MHz reference. You have to set it for in or out using the interface. However, if the sig gen thinks that the external reference is no longer there, it automatically switches to using the internal reference, and outputing it on the

Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

big ones... > > On 2018-01-16 18:47, Joseph Gray wrote: > >> If you want to watch this episode online, go here: >> http://video.unctv.org/video/3008204310 >> >> This is the UNC Public TV web site. >> >> Joe Gray >> W5JG >> >>

Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

If you want to watch this episode online, go here: http://video.unctv.org/video/3008204310 This is the UNC Public TV web site. Joe Gray W5JG On Tue, Jan 16, 2018 at 2:28 PM, Bill Tracey wrote: > To record OTA television I use an HDHomeRun : >

Re: [time-nuts] What to do with a 5061A/5061B with dead NiCds

I don't know which option would be best, but rebuilding the pack may not be expensive. A rebuilt NiCad pack for a Flukemeter only cost me $12. Fluke charges $120 for a new one. On Feb 5, 2017 4:27 PM, "Skip Withrow" wrote: > Hello time-nuts, > > I have 5061A and 5061B

Re: [time-nuts] FS: HP 10811A

OCXO is sold. Joe On Mon, Jan 30, 2017 at 6:33 PM, Joseph Gray <jg...@zianet.com> wrote: > Working pull from a piece of HP test gear. Includes a new gold-plated > edge-card socket that mates with the OCXO. $60 with free US shipping. > &g

[time-nuts] FS: HP 10811A

Working pull from a piece of HP test gear. Includes a new gold-plated edge-card socket that mates with the OCXO. $60 with free US shipping. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Ublox M8N - have I a XO or TCXO ?

Some time ago, I bought two different modules from Reyax on ebay. One module had a ublox M8N. Recently, I did some reading on several drone forums about fake ublox modules from China. It seems that modules from quite a few vendors are not genuine. From the information presented about identifying

Re: [time-nuts] HP Z3801A

Someone bought it with the Z3801A. Joe On Mon, Nov 28, 2016 at 11:08 AM, Eric Scace <e...@scace.org> wrote: > Hi Joe — > >I’ll take the HP-58516A splitter, if you’re willing to see it separately. > > — Eric K3NA > >> On 2016 Nov 27, at 14:15 , Joseph Gray <j

[time-nuts] Net4501 case

Does anyone have a spare case for a Soekris Net4501? It looks like Soekris no longer sells them. Joe Gray W5JG ___ 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

[time-nuts] FS: HP Z3801A

I'm selling my remaining Z3801A. Months ago, I replaced the original GPS module with a more sensitive Oncore VP. At that time, I also replaced several suspect capacitors on the DC-DC converter board. Everything has been 100% since. The RS-232 mod was done long ago. A serial cable and a 24 VDC

Re: [time-nuts] TCXO drift - related to TVB's posting

I periodically check that. On Nov 12, 2016 5:43 PM, "Adrian Godwin" <artgod...@gmail.com> wrote: > What if your shop reference were drifting up ? > > > On Sat, Nov 12, 2016 at 11:25 PM, Joseph Gray <jg...@zianet.com> wrote: > > > TCXO, not OCX

[time-nuts] TCXO drift - related to TVB's posting

TCXO, not OCXO, but related. Sorry, but I have no graphs. I work for a municipal radio shop. We service radios that span 20 years (through acquisitions, it was GE, Ericsson, Com-Net, M/A-COM, Tyco, now Harris). There are several different model handhelds and mobiles, with different designs and

[time-nuts] Unexpected problem found

This really is Time Nuts related. Keep reading. I recently bought some surplus Motorola UHF mobiles. They came with the previous frequencies blanked and only channel one programmed with 460.000 MHz. I put all of them on the bench to do a quick test to see if they transmitted and received. Upon

Re: [time-nuts] Moving GPSDO

ere's no position fix because > enough satellites have not been acquired. Too bad I lived in a valley. > > Let us know how this turns out, starting from an initial survey. > > Bill Hawkins > > -Original Message- > From: Joseph Gray > Sent: Sunday, October 16, 2016

[time-nuts] Moving GPSDO

I'm curious to know how accurately a GPSDO will keep its 10 MHz output while moving. No initial survey to set a position would be done. I don't care about the UTC time. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] FS: Garmin 18x LVC GPS

NIB with docs. $50 plus shipping. Joe Gray W5JG ___ 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] FS: PICTIC II

The kits are sold. Joe Gray W5JG ___ 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] FS: PICTIC II

More house cleaning. I have two PCB and all the parts (from Mouser) to build two PICTIC II units. Make me an offer. Joe Gray ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Schematic needed

Thanks to two list members, I got what I needed. Joe Gray W5JG ___ 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] Schematic needed

Can someone send me the schematic for this: https://www.febo.com/pipermail/time-nuts/2012-January/062616.html I looked through the list archives but didn't find the schematic posted anywhere. Joe Gray W5JG ___ time-nuts mailing list --

[time-nuts] FS: Starbox

AllStar DGPS base station. Uses a 10 MHz internal reference. I have lots of docs that I downloaded some time ago. Make me an offer. https://www.dropbox.com/s/jc4t1959l3bpf2v/Starbox.jpg?dl=01 Joe Gray W5JG ___ time-nuts mailing list --

[time-nuts] FS: HP 10811A

Has hole for coarse frequency adjust on the top. Edgecard connector and two mounting studs are on the bottom. I don't remember which piece of HP test equipment this came out of. Probably one of the Universal Counters. $100 OBO, plus shipping/insurance. Joe Gray W5JG

[time-nuts] FS: FE-5680A, 2 each

Info here: http://www.ko4bb.com/doku2015/doku.php?id=precision_timing:fe5680a_faq These are the fixed 10 MHz variety. Everything hooks up to the DE-9 connector. $100 each OBO, plus shipping/insurance. Joe Gray W5JG ___ time-nuts mailing list --

[time-nuts] FS: Prologix GPIB

One like new Prologix GPIB-USB controller $100 plus shipping/insurance. One like new Prologix GPIB-ETHERNET controller $150 plus shipping/insurance. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] FS: Lucent GPSDO

The new-in-box Lucent/Agilent REF-0/REF-1 units that were selling on ebay last year. I have been running this GPSDO ever since I bought it. Includes a Meanwell 24 VDC power supply. I will also include a spare REF-0 unit. $200 OBO plus shipping/insurance. More info:

[time-nuts] FS: Spectracom 8140 frequency distribution amps

More downsizing. One unit works 100% (I have been using it for years). It includes the 5 MHz option board, which I have disabled, for 10 MHz use. I have also disabled the DC voltage on the four outputs, as I wasn't using the external Taps. These functions can be very easily restored if you need

[time-nuts] FS: SR620

I am scaling back on my Time Nuttery. $1200 OBO, plus shipping & insurance. Joe Gray W5JG ___ 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] FS: Z3801A

Fully functional (in use now). Has been upgraded to an Oncore VP GPS module (more sensitive than the original). I replaced several caps on the DC-DC board with low-ESR parts (it wasn't necessary, but I didn't like the look of some of them). Includes DC power supply, but no antenna. $300 OBO.

Re: [time-nuts] GPS position

rs. > > Or are those errors swamped by other factors that are not receiver specific? > >> On May 2, 2016, at 2:44 PM, Joseph Gray <jg...@zianet.com> wrote: >> >> Sorry, no Thunderbolts. TVB emailed me to ask if I had one, to make >> the same suggestion. >> &

Re: [time-nuts] GPS position

Sorry, no Thunderbolts. TVB emailed me to ask if I had one, to make the same suggestion. Joe Gray W5JG On Mon, May 2, 2016 at 11:38 AM, Mark Sims wrote: > You could try Lady Heather's precision 48 hour survey. It basically does a > weighted average of median filtered fixes

Re: [time-nuts] GPS position

On the topic of benchmarks, I found this official site earlier this morning. http://www.ngs.noaa.gov/CORS-Proxy/NGSDataExplorer/ Joe Gray W5JG On Mon, May 2, 2016 at 1:49 PM, Wes wrote: > Nothing to do with time but... > > Technically speaking, in surveying a bench mark is

[time-nuts] Crazy PPS

After replacing the GPS module in Z3801A #2, I fired it up and let it run. For over an hour, things looked OK, then the PPS TI/s rose dramatically. Later, it started back down, Other than a high HUP, everything else looked good. What would cause this to happen?

[time-nuts] GPS position

Now that I have three (maybe four) working GPSDO's, I'd like to set the GPS coordinates the same on all of them. The survey that each one does produces very similar coordinates, but not exactly the same. The Z3801A's have VP's, the Lucent has a UT+. I don't know what is in the 58540A, as the

[time-nuts] Original Oncores for free

Does anyone want two non-working 6-channel Oncores that I pulled from Z3801A's? They may be repairable, but now that I have working VP's and spares, I don't want to take the time to fool with them. Just thought I'd ask before tossing them in the recycle bin. Joe Gray W5JG

Re: [time-nuts] Z3801A recovering

After about three hours: https://dl.dropboxusercontent.com/u/19599147/Z3801A%203hr.png Ignore the graph discontinuity at the beginning. I had to power cycle to change to UTC. Joe Gray W5JG On Sun, May 1, 2016 at 1:30 AM, Joseph Gray <jg...@zianet.com> wrote: > In past discussi

Re: [time-nuts] Z3801A recovering

In past discussions about replacing a 6-channel Oncore in a Z3801A with an 8-channel VP Oncore, some claimed that the VP had to first be put into 6-channel mode, others indicated this was not necessary. Earlier tonight, I put a VP (still in 8-channel mode) into my malfunctioning Z3801A. Monitoring

Re: [time-nuts] HP 58540A

I just thought I'd try the Z38XX program, to see what it shows. Well, none of the graphic windows, nor the logging windows show anything at all. I used the Manual Command Entry to test each of the query strings. At this point, I didn't want to try commands that changed things. Below are the

[time-nuts] HP 58540A

I just bought one of the above. Of course, before powering it on, I had to take the cover off to see what was inside. The OCXO is a Piezo 2900082-114, 10 MHz. It has a S/N of 1 and a date code of 9751. A search brought up several varieties of 2900082, but nothing on the -114 version. Can anyone

Re: [time-nuts] Z3801A recovering

Art, Thanks for the link. Very useful information. I also read the 'VP Service note" posted there. Is that note also referring to the oscillator, or some other component that needs periodic recalibration. In any case, it seems that they are recommending that we power down our GPSDO units every

Re: [time-nuts] Z3801A recovering

be able to use the UT+ modules elsewhere. Joe Gray W5JG On Fri, Mar 18, 2016 at 8:21 AM, John Green <wpxs...@gmail.com> wrote: > Joe, I'd be interested in knowing what you find out. My Z3801 is acting a > lot like yours. It is currently locked, but. > > On Thu, Mar 17, 2016 at 8:15 A

[time-nuts] Oncore battery

Can anyone recommend a rechargeable lithium coin cell that is a direct replacement for the ones that come on some Oncore receivers? Something I can order from Mouser or Digikey, if possible. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Difference between Oncore models

essive power cycle, I have one receiver > that will now fail within 20 minutes predictably. > > Dave > NR1DX > > > > > On 3/16/2016 7:03 AM, Joseph Gray wrote: >> >> I understand that the Oncore GPS in the Lucent units is a newer module >> that tracks eight sate

Re: [time-nuts] Lucent GPS UTC confusion

Hal, I did the "*TST?" command, which seemed to do a power cycle. The Status screen shows "GPS 1PPS Synchronized to UTC". Joe Gray W5JG On Wed, Mar 16, 2016 at 11:30 PM, Hal Murray wrote: > > jg...@zianet.com said: >> I noticed on the Status screen that the Lucent

[time-nuts] Microsonics TCXO

I got my hands on some of these. https://dl.dropboxusercontent.com/u/19599147/TCXO%20Top.jpg https://dl.dropboxusercontent.com/u/19599147/TCXO%20Bottom.jpg A search finds other Microsonics units, but not this one. I can't find any information on what voltage to feed this. Does anyone know? I

Re: [time-nuts] Lucent GPS UTC confusion

, 2016 at 7:27 AM, Paul <tic-...@bodosom.net> wrote: > > On Wed, Mar 16, 2016 at 8:29 PM, Joseph Gray <jg...@zianet.com> wrote: >> >> I noticed on the Status screen that the Lucent unit said the PPS was >> locked to GPS, not UTC, as the Z3801A is. So, I

[time-nuts] Z3801A EEPROM

Referring to this old post: https://www.febo.com/pipermail/time-nuts/2011-December/061718.html In particular, this statement: "but If the RTC in the receiver is not set or its battery has failed, and the reference year stored in EEPROM is also wrong, the receiver may select the wrong 20-year

Re: [time-nuts] Serial-Ethernet

the look of this graph, it seems to be performing quite well. https://dl.dropboxusercontent.com/u/19599147/Lucent%20Adev.png Joe Gray W5JG On Tue, Mar 15, 2016 at 7:05 PM, Joseph Gray <jg...@zianet.com> wrote: > On Thu, Feb 25, 2016 at 1:38 AM, Tom Van Baak <t...@leapsecon

Re: [time-nuts] Serial-Ethernet

don’t really have all you need to come up with proper numbers. A simple scale > error can make things look much better or much worse than they actually are. > > Bob > >> On Mar 16, 2016, at 7:54 PM, Joseph Gray <jg...@zianet.com> wrote: >> >> Well, the 4-por

[time-nuts] Lucent GPS UTC confusion

I noticed on the Status screen that the Lucent unit said the PPS was locked to GPS, not UTC, as the Z3801A is. So, I issued ":DIAG:GPS:UTC 1" and "TST?" to correct this. But things are not as I expected. Displaying the clock for both GPSDO's in Z38xx now shows them to be 17 seconds different,

Re: [time-nuts] Z3801A recovering

mmand or What software are you running? > > I would power the unit down and let it sit for 24 hours and then do the two > commands above. > > What software are you running? > > Dave > NR1DX > > > > > > On 3/16/2016 7:38 PM, Joseph Gray wrote: >&

[time-nuts] Z3801A recovering

As I mentioned a while back, my trusty Z3801A, which has worked well for several years, went into holdover some time ago and stayed there. Until recently, I haven't had time to look into this. About 20 days ago, I did power cycle it to see if that made a difference. It did not. In the middle of

Re: [time-nuts] Z3801A recovering

gt; running? >> > >> > I would power the unit down and let it sit for 24 hours and then do the >> two >> > commands above. >> > >> > What software are you running? >> > >> > Dave >> > NR1DX >> > >> > >> > >&

Re: [time-nuts] Z3801A EEPROM

troubleshooting a flakey Z3801A and the fact that I traded for another Z3801A. Joe Gray W5JG On Fri, Mar 18, 2016 at 3:42 PM, Magnus Danielson <mag...@rubidium.dyndns.org> wrote: > Joe, > > On 03/18/2016 02:33 AM, Joseph Gray wrote: >> >> Referring to this old post: >> >&

[time-nuts] Difference between Oncore models

I understand that the Oncore GPS in the Lucent units is a newer module that tracks eight satellites, vs the older Oncore in the Z3801A that only tracks six satellites. I decided to do a re-survey with my Z3801A that has been in holdover for some time, just as a test. Watching the status screens

[time-nuts] Lucent PPS

Although I have had this GPSDO operating continuously for several months, this is the first time I have looked at the serial output. The Status information looks OK to me, but should the PPS be jumping around this much? I can't compare it to my Z3801A as I haven't gotten around to fixing it yet

Re: [time-nuts] Serial-Ethernet

On Thu, Feb 25, 2016 at 1:38 AM, Tom Van Baak wrote: > > And, if you have a couple of 422 devices, consider the economics of a 4-port > unit like: > > http://www.ebay.com/itm/301881123530 As promised, I am reporting on the USR-N540, 4-serial-port to Ethernet box that Tom

Re: [time-nuts] BG7TBL GPS Disciplined Source

There is a long thread over on the EEVblog forum about the various versions made by BG7TBL. You can match the date and pictures with what you have. Joe Gray W5JG On Sun, Mar 13, 2016 at 9:47 PM, Gedas wrote: > Hello to the group. I am a new member and 1st wanted to say hello.

Re: [time-nuts] Best Rubidium Frequency Standard

> Or, perhaps not. The two working TSD12s that I see on eBay (apparently > the same as the PRS-10 except the lock flag is set to 3 instead of 1 and > which can be reset) Would you elaborate on this? I Googled for TSD12 and except for the auction listings, found nothing. Joe

Re: [time-nuts] I am a nut

I'll probaly not touch it. The reference is certainly good enough for any radio repair. I just thought it was funny that at 0.2 Hz, my first impulse was to "fix" it. Joe Gray W5JG On Wed, Mar 2, 2016 at 9:57 AM, Chuck Harris wrote: > Speaking of Wavetek 3000's: They are

Re: [time-nuts] Serial-Ethernet

> And, if you have a couple of 422 devices, consider the economics of a 4-port > unit like: > > http://www.ebay.com/itm/301881123530 > > I have no affiliation with any seller, nor have I tried these specific items. > But they are inexpensive and look worthwhile. OTOH, I'm nervous about any >

Re: [time-nuts] SoftMark USB to GPIB converter

>From all accounts, the Softmark unit is pretty useless. Depending on which software you will use, you might consider a Prologix. Also, there are quite a few Agilent USB-GPIB converters on ebay. Although I understand that most of the ones selling as "new" are fakes. I ordered a "used" one. When I

[time-nuts] I am a nut

I just got an HP 8920B service monitor to replace what I had before. It has the High Stability oscillator option. After running the self tests, I was doing a quick check of the internal reference. With my frequency counter locked to a GPSDO, I see that the 8920B reference is 0.2 Hz high. OMG! I'd

Re: [time-nuts] FW: Instrument BASIC

All this talk of Instrument BASIC brings up a question. Is the Windows version "out there" somewhere? I know you can't buy it any more. Joe Gray W5JG On Sun, Feb 28, 2016 at 5:11 PM, Daun Yeagley wrote: > Hi Magnus > > My memory is a bit faded on this, but the Instrument

Re: [time-nuts] Inside a CTS 1960017 OCXO

Nice teardown. I was looking at that listing just yesterday. I am tempted, but don't know what I'd do with 40. The real question is, how do they perform? Joe Gray W5JG On Feb 27, 2016 9:48 AM, "Daniel Watson" wrote: > Hi, > > I'm sure many of you are tracking the cheap

Re: [time-nuts] Serial-Ethernet

Dave, I am running Win7 64-bit. Joe Gray W5JG On Thu, Feb 25, 2016 at 1:57 AM, Artek Manuals <manu...@artekmanuals.com> wrote: > On 2/25/2016 12:01 AM, Joseph Gray wrote: >> >> I just thought I'd report about a serial to Ethernet interface I just >> bought. I g

Re: [time-nuts] Z3801A holdover

with >> only 4 sats and with low signal strength. >> >> I then replaced the GPS receiver and now all is well. It found itself, 8 >> sats, good signal strength, correct date and time, as compared to the TBolt. >> >> So, the GPS receiver might be on the list for your p

Re: [time-nuts] Serial-Ethernet

ny seller, nor have I tried these specific items. > But they are inexpensive and look worthwhile. OTOH, I'm nervous about any > networking product made in CN even if its web interface says "IOT Experts" > and "Be Honest, Do Best!"... > > /tvb > > -

Re: [time-nuts] Serial-Ethernet

any seller, nor have I tried these specific items. > But they are inexpensive and look worthwhile. OTOH, I'm nervous about any > networking product made in CN even if its web interface says "IOT Experts" > and "Be Honest, Do Best!"... > > /tvb > > - Origi

Re: [time-nuts] Z3801A holdover

the unit has maxed out the EFC voltage one way. Joe Gray W5JG On Thu, Feb 25, 2016 at 1:54 AM, Artek Manuals <manu...@artekmanuals.com> wrote: > On 2/24/2016 11:37 PM, Joseph Gray wrote: >> >> I just took a look at my Z3801A that has been in holdover for some >> time.

[time-nuts] Serial-Ethernet

I just thought I'd report about a serial to Ethernet interface I just bought. I got one of these: http://www.amazon.com/gp/product/B00ATV2DX2 At the moment it is hooked up to my Z3801A and I am using Z38XX.exe from across the network. Using the included software and driver, I have the RS232 port

[time-nuts] Z3801A holdover

I just took a look at my Z3801A that has been in holdover for some time. I have been too busy to do anything about it until now. Before looking at the receiver stats just now, my first guess was that the Oncore GPS board went bad. However, I see that it is currently tracking 4 sats. I also see

Re: [time-nuts] SR620 testing

I don't think I would use the XY output, but I'm sure that this tilted and overlaid text is not correct. https://dl.dropboxusercontent.com/u/19599147/XY%20mode.jpg Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] SR620 testing

Ignore the problem with EXT trigger. I did a factory reset and now it is working. I should have thought to reset it to begin with. Joe Gray W5JG On Mon, Feb 22, 2016 at 8:14 PM, Joseph Gray <jg...@zianet.com> wrote: > Finally got an SR620 at a decent price. I'm going through the >

[time-nuts] SR620 testing

Finally got an SR620 at a decent price. I'm going through the Functional Tests and the Performance Tests now. So far, I have two anomalies. Pg 62 Functional Test - EXT input. When I vary the EXT trigger knob, I don't get the trigger LED, except that it flashes briefly at one spot as I move the

[time-nuts] SR620

OK, who got the SR620 with the "test error 34"? From looking at the manual, it may simply be user error and the instrument may be just fine. If you are the buyer, I hope that is true and that you got a bargain. I took a stab at buying it, but wasn't willing to chance too much, in case there was

Re: [time-nuts] Calibration procedures - what is normal?

On Fri, Feb 12, 2016 at 3:43 PM, Richard (Rick) Karlquist wrote: > I left Agilent just before the split, but I don't know > anyone there who liked that name. Or the logo :-) Another recent name change (acquisition) that is even worse is Aeroflex to Cobham. I realize that

Re: [time-nuts] Calibration procedures - what is normal?

kir...@kirkbymicrowave.co.uk> wrote: > On 12 Feb 2016 21:12, "Joseph Gray" <jg...@zianet.com> wrote: >> >> I sent my HP 3457A in for cal. I should be getting it back next week. >> I won't mention where I sent it, but it wasn't Keysight (I don't like >> that name). I re

[time-nuts] Calibration procedures - what is normal?

I sent my HP 3457A in for cal. I should be getting it back next week. I won't mention where I sent it, but it wasn't Keysight (I don't like that name). I recently changed the SRAM battery and purposely did not save the cal constants. I bought the meter second hand and it wasn't in spec when I

[time-nuts] Cheap GPSDO's

I searched the list archives and found some discussion mid-to-late last year about several inexpensive GPSDO's made by bg7tbl. It seems that all of the better models (according to discussion on the EEVBlog forum) are gone. I do find two similar units currently listed:

[time-nuts] Not so cheap GPSDO's

Moving upscale to more well known models that cost quite a bit more, I see several Z3805A units. It looks like more than one type of OCXO was used in these. Which variant would you recommend? The less expensive Z3805A's look like they have been beat to crap, before or after being pulled from the

[time-nuts] HP 10811

I have a spare 10811 that I want to setup as a standalone reference. Since it is a double oven unit, should I put it and the power supply in just a single walled plastic or metal box? Should I make air vents or not? Going to extremes, can I put the OCXO inside a thick Styrofoam box with no air

Re: [time-nuts] HPZ3801 Failure

board went bad. I'll have to see if they are still available on ebay. After decades of use, I just can't understand why these things fail :-) Too many projects. Joe Gray W5JG On Thu, Feb 4, 2016 at 8:09 PM, Joseph Gray <jg...@zianet.com> wrote: > Wes, > > I just checked and KO

Re: [time-nuts] HPZ3801 Failure

Wes, I just checked and KO4BB already has the power supply info. http://www.ko4bb.com/manuals/index.php?dir=02_GPS_Timing/Z3801 Joe Gray W5JG On Thu, Feb 4, 2016 at 5:21 PM, paul swed wrote: > Daves absolutely correct about working around bad supplies. > The reason for

Re: [time-nuts] T.I. questions

Oops, I missed a digit on that last email. it should be 10,000 s average for 100 ps resolution. Joe Gray W5JG On Wed, Feb 4, 2015 at 1:58 PM, Joseph Gray jg...@zianet.com wrote: Sorry for the simple questions. Old hands can simply ignore this message if it bothers you. I have an HP 5328A

[time-nuts] T.I. questions

Sorry for the simple questions. Old hands can simply ignore this message if it bothers you. I have an HP 5328A that I have pieced together from broken units. As soon as I make a ribbon cable for the GPIB card, I want to use it for T.I. measurements. I know it isn't nearly as good as a 5370, but

[time-nuts] Arduino GPIB

I thought everyone here would find this of interest. I stumbled across it a few days ago on the 'net. It is a Prologix GPIB-USB compatible made with an Arduino Uno. http://egirland.blogspot.com/2014/03/arduino-uno-as-usb-to-gpib-controller.html Like on his web site, I just took a cheap GPIB

Re: [time-nuts] Any reason not to use one power amplifier and splitter for distribution amplifier?

My 2 cents. I just repurposed an RGB video distribution amp for use with a rubidium. The board has three EL2070 (200 MHz BW) amps, each one feeds several BNC jacks for RGB output. I only need three separate, isolated outputs, so I am feeding the rubidium into all three EL2070's and only taking one

Re: [time-nuts] Which First GPSDO to buy?

I don't mean to one up Chris, but if you are looking for inexpensive, I have bought the same Pro Mini from this seller for $2.58. Like Chris says, you can't buy the parts this for this. And if you need the 3.3 VDC version: http://www.ebay.com/itm/191182699659 I bought six of the Pro Mini's from

Re: [time-nuts] Which First GPSDO to buy?

I have to watch what I'm typing a little closer. I meant to say You can't buy the parts this cheap. Joe Gray W5JG On Sun, Dec 14, 2014 at 8:56 AM, Chris Albertson albertson.ch...@gmail.com wrote: It's not worth making a PCB, not when you can buy the whole thing already assembled for $3 with

Re: [time-nuts] KS-24361 quirk

I haven't checked the PPS yet, but the 15 MHz from the standby unit is off on my setup. Joe Gray W5JG On Sat, Dec 13, 2014 at 9:55 PM, Hal Murray hmur...@megapathdsl.net wrote: Can somebody confirm that the PPS and 15 MHz on the standby unit are disabled? Does anybody understand how/why they

Re: [time-nuts] Which First GPSDO to buy?

Do you have the details on your stripped down version posted somewhere accessable? Joe Gray W5JG On Sat, Dec 13, 2014 at 10:47 PM, Chris Albertson albertson.ch...@gmail.com wrote: I tried to see just how simple, low cost and self contained I could make a GPSDO. I started with the Lars

Re: [time-nuts] Another GPSDO

later, it is 2.77e-10 high. Joe Gray W5JG On Wed, Dec 10, 2014 at 5:05 AM, Bob Camp kb...@n1k.org wrote: Hi The antenna connectors on the front of the KS box are TNC's Bob On Dec 9, 2014, at 9:13 PM, Joseph Gray jg...@zianet.com wrote: Paul, Thanks for the info. I have been

Re: [time-nuts] Another GPSDO

thing (now compared to the Lucent) as it warms up. Best to leave all theses OCXO based boxes on all the time. Bob On Dec 12, 2014, at 9:17 PM, Joseph Gray jg...@zianet.com wrote: Just an update. I found that I didn't have another 24 VDC supply, so Mouser to the rescue. The supply

[time-nuts] Another GPSDO

I think I have finally graduated to Junior Time Nut. I now have three GPSDO's. The trusty Z3801A I have had for years. The LTE-Lite is recent. The Lucent 2-box unit just arrived today. Maybe I'll finally know what time it is :-) This Lucent is much smaller than I thought it would be. Slightly

[time-nuts] Nortel Trimble GPSDO

Did I miss the discussion, or hasn't anyone mentioned this unit on ebay? With a timing antenna, it looks like a good deal. Nortel Trimble NTBW50AA GPSTM 10MHz Oscillator GPSDO + Antenna Acc. Thunderbolt Item 301424570443 Joe Gray W5JG ___ time-nuts

Re: [time-nuts] Another GPSDO

since the lucents are most likely NOS you will need to let it cook in 30 days. I now have two units and they do match up well to the 3801. But they did need to age. Just a heads up. It is nice to see them line up pretty well. Regards Paul WB8TSL On Tue, Dec 9, 2014 at 7:37 PM, Joseph Gray

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