Re: [time-nuts] Fw: Skytraq / GPS Almanac

Status -- all is back to normal with GPS as of this morning. At least for now, the folks that run GPS appear to have reversed the change made last week that triggered latent bugs in some receivers. A note from Said just now: > Hi Tom, > > Would you mind posting to Time nuts that this is a confir

Re: [time-nuts] Fw: Skytraq / GPS Almanac

I don’t have any SkyTraq navigation modules, but I power cycled a couple of my clocks (with the timing modules) and they came back up as they usually do, so I can tentatively confirm that in survey-and-hold mode they don’t appear to have any problems getting a fix. TBD is vetting the results to

Re: [time-nuts] Fw: Skytraq / GPS Almanac

Maybe this can be useful: On Wed, Sep 27, 2017 at 5:58 AM, Scott Newell wrote: > At 05:20 PM 9/26/2017, Tom Van Baak wrote: >> >> An interesting note from Said, below... >> I've sent a couple of queries out to GPS professi

Re: [time-nuts] Fw: Skytraq / GPS Almanac

At 05:20 PM 9/26/2017, Tom Van Baak wrote: An interesting note from Said, below... I've sent a couple of queries out to GPS professionals. Feel free to comment if you have concrete information that would help. Also, if during the past week any of you were logging almanacs or continuously recordi

Re: [time-nuts] Fw: Skytraq / GPS Almanac

So Tom and I were batting this one around for a while, and think we mostly know what the proximal cause of the reported problems are, even if we don't know the specific code bug that causes the Skytraq failure. I have a database of recent (last year) broadcast parameters that made it pr

[time-nuts] Fw: Skytraq / GPS Almanac

An interesting note from Said, below... I've sent a couple of queries out to GPS professionals. Feel free to comment if you have concrete information that would help. Also, if during the past week any of you were logging almanacs or continuously recording the 50 bps raw data from any GPS/SV, pleas

[time-nuts] Fw: HP 1820-0313 4.2V Logic (Flip-flop)

Dave M wrote: Poul-Henning Kamp wrote: In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf Kylenfall via time-nut s writes: That the 1820-0313 is unobtanium I can understand.Has anyone created an equvalent based on discretesor is there a suitable SMD "single" flip-flop li

Re: [time-nuts] FW: GPS Antenna

I do not recognize the part number. All I can offer is that Micropulse has been acquired by PCTEL. Their GPS antenna line is here: http://www.antenna.com/apg_product_lines.cgi?id_num=150 It may be that the antenna you have was labelled for an OEM and is identical or very similar to one of their

Re: [time-nuts] FW: GPS Antenna

On Sat, Jul 16, 2016 at 9:56 PM, Lester Veenstra wrote: > Can anyone help Hal? > Data on: GPS Antenna Micropulse Z1001 > Is there a part number, or an year of manufacture? -- Sanjeev Gupta +65 98551208 http://www.linkedin.com/in/ghane ___ time-nu

[time-nuts] FW: GPS Antenna

Can anyone help Hal? Data on: GPS Antenna Micropulse Z1001 Lester B Veenstra  MØYCM K1YCM W8YCM les...@veenstras.com Physical and US Postal Addresses 5 Shrine Club Drive (Physical) 452 Stable Ln (RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (

[time-nuts] Fw: Commercial software defined radio for clock metrology

The FPGA is probably adequate (if it has LVDS inputs), but a dual single chip ADC is also required. Bruce On Saturday, 28 May 2016 5:05 PM, Bob Stewart wrote: Hi Bruce, What about the BeMicroCV-A9 that Scotty Cowling has been recommending in QEX?  It has a Cyclone V SoC FPGA running

Re: [time-nuts] Fw: Optical transfer of time and frequency

> > ----- Original Message - > From: "Mark Sims" > To: > Sent: Wednesday, May 04, 2016 4:41 PM > Subject: [time-nuts] Fw: Optical transfer of time and frequency > > >>> See www.leapsecond.com/tmp/5071a-12-run8-5d-10d.gif for a plot of a bunch

Re: [time-nuts] Fw: Optical transfer of time and frequency

atistics. I know I'm not explaining this well enough, and it's a bit off-topic for this thread, but I'll write it up later and post it. /tvb - Original Message - From: "Mark Sims" To: Sent: Wednesday, May 04, 2016 4:41 PM Subject: [time-nuts] Fw: Optical transf

[time-nuts] Fw: Optical transfer of time and frequency

> See www.leapsecond.com/tmp/5071a-12-run8-5d-10d.gif for a plot of a bunch of > 5071A Cs clocks. Interesting... what happened on day 4 to send them all bonkers? ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Fw: Optical transfer of time and frequency

adjust the timestamps in post-facto. /tvb - Original Message - From: "Hal Murray" To: "Tom Van Baak" ; "Discussion of precise time and frequency measurement" Cc: Sent: Wednesday, May 04, 2016 10:30 AM Subject: Re: [time-nuts] Fw: Optical transfer of ti

Re: [time-nuts] Fw: Optical transfer of time and frequency

ck or passively compare them to within > > 500 ps in order to adjust the timestamps in post-facto. > > > > /tvb > > > > ----- Original Message - > > From: "Hal Murray" > > To: "Tom Van Baak" ; "Discussion of precise time and >

Re: [time-nuts] Fw: Optical transfer of time and frequency

cks. He needs some method to > actively keep them in tight phase lock or passively compare them to within > 500 ps in order to adjust the timestamps in post-facto. > > /tvb > > - Original Message - > From: "Hal Murray" > To: "Tom Van Baak" ; &qu

Re: [time-nuts] Fw: Optical transfer of time and frequency

/tvb - Original Message - From: "Hal Murray" To: "Tom Van Baak" ; "Discussion of precise time and frequency measurement" Cc: Sent: Wednesday, May 04, 2016 10:30 AM Subject: Re: [time-nuts] Fw: Optical transfer of time and frequency > > t...@leapsecond.co

Re: [time-nuts] Fw: Optical transfer of time and frequency

ssage - From: "Azelio Boriani" To: "Discussion of precise time and frequency measurement" Sent: Monday, May 02, 2016 5:20 AM Subject: Re: [time-nuts] Fw: Optical transfer of time and frequency If every station has its own GPSDO, what is the purpose of the optical transfer

Re: [time-nuts] Fw: Optical transfer of time and frequency

t...@leapsecond.com said: > Any of these methods is going to be a challenge, given their 500 ps > requirement and their $2k budget. How stable are surplus rubidium oscillators? How close could you get if you brought two of them together, compared phase, drove them to the site for a nights work

Re: [time-nuts] Fw: Optical transfer of time and frequency

- From: "Azelio Boriani" To: "Discussion of precise time and frequency measurement" Sent: Monday, May 02, 2016 5:20 AM Subject: Re: [time-nuts] Fw: Optical transfer of time and frequency > If every station has its own GPSDO, what is the purpose of the optical > transf

Re: [time-nuts] Fw: Optical transfer of time and frequency

If every station has its own GPSDO, what is the purpose of the optical transfer? On Mon, May 2, 2016 at 11:14 AM, Michael Wouters wrote: > One other possibility occurs to me that might be doable with surplus > gear and sticks to the budget. Instead of using WR, give up on > getting time of day a

Re: [time-nuts] Fw: Optical transfer of time and frequency

If the dynamics is working for you, yes, you can use something like that. If you have noise, you would like a spreading code such that the correlation in the receiver suppress the noise. MVH Magnus On 05/02/2016 11:14 AM, Michael Wouters wrote: One other possibility occurs to me that might be

Re: [time-nuts] Fw: Optical transfer of time and frequency

One other possibility occurs to me that might be doable with surplus gear and sticks to the budget. Instead of using WR, give up on getting time of day and just send a 1 kHz pulse stream in each direction. Each station then measures against its own GPSDO clock using a standard/homebrew TIC and rec

Re: [time-nuts] Fw: Optical transfer of time and frequency

Javier, On 05/01/2016 02:54 PM, Javier Serrano wrote: On Sun, May 1, 2016 at 9:50 AM, Magnus Danielson wrote: If I recall correctly, there where some White Rabbit stuff available from vendors, was it only Ethernet switches or also cards? Yes, the switch is available from two vendors that I k

Re: [time-nuts] Fw: Optical transfer of time and frequency

On Sun, May 1, 2016 at 5:44 PM, Tom Van Baak wrote: > This particular issue -- how to synchronize (or, at least phase compare) > multiple oscillators by a two-way laser link over a few km to within 500 ps > -- is really quite interesting. It would, for example, allow me to do live > monitoring

Re: [time-nuts] Fw: Optical transfer of time and frequency

> Has anybody experienced with free-space optical gigabit Ethernet > links? I am curious about whether the transceivers have a fixed > latency or at least a latency one can easily quantify online. This is > the trickiest part for adding WR support on top of a given physical > layer. Hi Javier, Wh

Re: [time-nuts] Fw: Optical transfer of time and frequency

On Sun, May 1, 2016 at 9:50 AM, Magnus Danielson wrote: > If I recall correctly, there where some White Rabbit stuff available from > vendors, was it only Ethernet switches or also cards? Yes, the switch is available from two vendors that I know of. They are referenced at [1]. For nodes, we have

Re: [time-nuts] Fw: Optical transfer of time and frequency

Javier, If I recall correctly, there where some White Rabbit stuff available from vendors, was it only Ethernet switches or also cards? Cheers, Magnus On 05/01/2016 01:14 AM, Bruce Griffiths wrote: On Sunday, 1 May 2016 10:52 AM, Bruce Griffiths wrote: White Rabbit is open hard

[time-nuts] Fw: Optical transfer of time and frequency

On Sunday, 1 May 2016 10:52 AM, Bruce Griffiths wrote: White Rabbit is open hardware, you are free to build it yourself should you want to do so. All the relevant VHDL etc is available.There will also be suitable TDC designs available on the CERN site.You can also integrate these in

[time-nuts] FW: : HP 5360A History(Terminet answerback board)

Subject: : [time-nuts] HP 5360A History(Terminet answerback board) Good evening Tom and TN, I was a manufacturing engineer and set up the initial assembly line for the Terminet board area in 1969 in Waynesboro Virginia. I remember those being very different boards. Learned about and trained fo

Re: [time-nuts] Fw: 5065

On 3/19/2016 1:43 AM, tim...@timeok.it wrote: > > > > Tom, > it is not, see the Farnell code below followed by Amphenol part number: > > > Farnell code: 1914117 pn 97-3106A18-22S connector > Farnell code: 1654733 pn 9779-513-8 plastic ring > Farnell code: 151628 pn 97-3057-1010-1 cable clamp and bu

Re: [time-nuts] Fw: 5065

Both good answers the old connect to the bottom, and my favorite get the connector. I used both methods. Connected to the bottom, fixed the unit, purchased the real connector. It was something like $18 or $30. Search time nuts because 2 years ago someone figured out the model numbers and source. So

Re: [time-nuts] Fw: 5065

Ulrich, you can buy it from Farnell: Farnell code: 1914117 pn 97-3106A18-22S connector Farnell code: 1654733 pn 9779-513-8 plastic ring Farnell code: 151628 pn 97-3057-1010-1 cable clamp and bush Luciano www.timeok.it On Thu 17/03/16 15:29 , KA2WEU--- via time-nuts wrote: > The HP 50

Re: [time-nuts] Fw: 5065

very important, make sure you've got the right pins. See http://leapsecond.com/museum/hp5065a/conn.htm for details. /tvb - Original Message - From: "KA2WEU--- via time-nuts" To: Sent: Thursday, March 17, 2016 7:29 AM Subject: Re: [time-nuts] Fw: 5065 > > The H

Re: [time-nuts] Fw: 5065

The HP 5065A Rubidium Frequency Standard requires a circular 3 pin adapter cable that can be plugged into 115V AC outlet. I checked all cables I have and this particular cable is not finable. Can the unit set to 110/220 V Maybe this cable can be purchased or assembled ? ULRICH ___

Re: [time-nuts] Fw: 5065

is different between the 5061A and some of the 5065A's but >> I've never found a 5065A that was different from my 5061A. >> >> Might want to open the unit and make sure the wiring matches the schematic. >> >> Good luck. >> >> Joe >> >

Re: [time-nuts] Fw: 5065

> I've never found a 5065A that was different from my 5061A. > > Might want to open the unit and make sure the wiring matches the schematic. > > Good luck. > > Joe > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2W

Re: [time-nuts] Fw: 5065

Tom, it is not, see the Farnell code below followed by Amphenol part number: Farnell code: 1914117 pn 97-3106A18-22S connector Farnell code: 1654733 pn 9779-513-8 plastic ring Farnell code: 151628 pn 97-3057-1010-1 cable clamp and bush see also: http://canada.newark.com/amphenol-industrial/

Re: [time-nuts] Fw: 5065

From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU--- via time-nuts Sent: Thursday, March 17, 2016 9:30 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Fw: 5065 The HP 5065A Rubidium Frequency Standard requires a circular 3 pin adapter cable that can be plugged into

Re: [time-nuts] Fw: 5065

In message , "Tom Van Baak" writes: With respect to 120/240VAC, the 5065 I have is jumpered for 5065, the manual (available from Artek) has the details. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD

Re: [time-nuts] Fw: 5065

Anywhere there is a concentration of HAMs you should be able to find the connector. I found the one for my 5061 at a ham swapmeet and found another for a friend by asking a few hams who were the 'collector' type. On Thu, Mar 17, 2016 at 10:54 AM, paul swed wrote: > Both good answers the old conn

Re: [time-nuts] Fw: 5065

Yes. Thats an original. But someone posted on time nuts an alternate to amphenol and at a reasonable cost that was brand new. Thats how I came by my sets. I agree with Pete you do find them at hamfests in various condition. Regards Paul WB8TSL On Thu, Mar 17, 2016 at 4:04 PM, Pete Lancashire wrot

Re: [time-nuts] Fw: 5065

on the surplus market fairly cheap. Regards, Tom - Original Message - From: "J. L. Trantham" To: ; "'Discussion of precise time and frequency measurement'" Sent: Thursday, March 17, 2016 5:56 PM Subject: Re: [time-nuts] Fw: 5065 Ulrich, The connect

Re: [time-nuts] FW: Instrument BASIC

Joseph, I had seen that the rocky mountain basic was available at some $680 for one license. I guess if you really want it you will pay that. However that will not be me. Regards Paul WB8TSL On Sun, Feb 28, 2016 at 8:50 PM, Joseph Gray wrote: > All this talk of Instrument BASIC brings up a quest

Re: [time-nuts] FW: Instrument BASIC

Daun... I believe turning the option on required entering a license code. Tom Holmes, N8ZM -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Daun Yeagley Sent: Sunday, February 28, 2016 7:12 PM To: time-nuts@febo.com Subject: [time-nuts] FW: Instrument

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 Basic on the 894xx is

Re: [time-nuts] FW: Instrument BASIC

Hi Daun, Lacking the option I did ask the question how to enable or install it. I think it would be a nice way of doing some things, knowing from previous experience, and in particular since it seems like it also can act as a GPIB controller, which is useful when interacting with other instrum

[time-nuts] FW: Instrument BASIC

Hi Magnus My memory is a bit faded on this, but the Instrument Basic on the 894xx is pretty useful, and I'd recommend making use of it. Instrument Basic is a subset of "Rocky Mountain Basic" which was a very useful programming language, especially for instrument control. "Back in the day", I

[time-nuts] FW: More serial ports in NanoBSD

Thank you Mike for your tips but NanoBSD in my situation is a read only system because its stored on a flash card and copied in to RAM during the boot sequence. I don't see any UART in the boot messages. This the result of the # dmesg | grep -E "^sio[0-9]" command. sio0 at port 0x3f8-0x3ff ir

[time-nuts] FW: Leap Second June 30, 2015 Video

Greetings to all timekeepers, Using a Trimble Thunderbolt and Lady Heather I created a short video of the recent leap second event and put it on UTUBE which documents this event. I viewed ...58..59..60..00..01.. You can watch it here: https://www.youtube.com/watch?v=o3mbzqRxWyE&feature=you

Re: [time-nuts] Fw: Homebrew frequency counter, need help

Thanks Tom, The "front end" is still 75ALS176, but I put another simple transistor circuit from wenzel to to compare the performance. http://www.wenzel.com/wp-content/uploads/diffsqr.gif 2014-12-12 17:04 GMT+08:00, Tom Van Baak : > This large posting is from Li Ang. > /tvb > > - Original Me

Re: [time-nuts] Fw: GPS, NTP, and Cisco routers...

Dear Mark, Thanks for the file. In fact the 7204 & IOS was work for 10year+ when it pair w/ TimesSource3600 PRS. a few month before the TS3600 was dead and I replace it w/ TS3550. So I was wondering, is there something difference in TOD between TS3600 & TS3550. Any suggestion?, I already replace

[time-nuts] FW: Z3810 Correction

Correction of post sent about 5 min ago. I had TX- going to pin 7. It should go to Pin 8 of Z3810. Bill Riches I finally got my 3810 talking with my windows 7 64 bit pc. 1. Ordered a Gearmo GM-485422 USB to RS-485-422 interface converter from Amazon - 39.95. http://www.amaz

[time-nuts] Fw: Re: Cutler NAA on 24.0kHz....

___ 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] FW: Finding Victims Trapped in Rubble with NASA Radar Device

Kudos to Jim Lux! Regards, John K1AE John Allen - PC Support Solutions www.pcsupportsolutions.com PC On Site Service and Training - Computer HW/SW/Network debugging, installation and upgrades. Dell Premier Partner sales. Check me out on Yelp!

[time-nuts] Fw: Rb as source for ADEV?

Hi Orin, No, it's not a matter of just talking to the device.  I can to that.  The problem happens when you want more than one program/process to access the GPIB bus at the same time; e.g. running two different tests.  For that you have to have a server process which manages the interface and

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

rement" < > time-nuts@febo.com> > Sent: Thursday, October 03, 2013 11:18 AM > Subject: Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, > Datum > > > > Joe, > I did not actually look at the numbers until your email. I did reformat and > clean them

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

s not too clear. I know everyone says the tubes can't be rebuilt, but why? Tom - Original Message - From: "paul swed" To: "Discussion of precise time and frequency measurement" Sent: Thursday, October 03, 2013 11:18 AM Subject: Re: [time-nuts] Fw: FT

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

October 02, 2013 9:54 PM > To: time-nuts@febo.com > Subject: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum > > > > Just to get this data on the list. > > Here are the measured voltages on U1: > > Pin Fn Voltage Lim

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

:time-nuts-boun...@febo.com] On Behalf Of Tom Miller Sent: Wednesday, October 02, 2013 9:54 PM To: time-nuts@febo.com Subject: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum Just to get this data on the list. Here are the measured voltages on U1: P

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

Suspicious for a dead tube. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Miller Sent: Wednesday, October 02, 2013 9:54 PM To: time-nuts@febo.com Subject: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, D

Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

Tom I have uploaded rom images to Diddiers and others sites for safe keeping. Thankfully others do also. Thats exactly how I was able to recover my HP5100d digital scope. It had alzheimers and though I looked high and low for an image for 3 years, it was only after I purchased a tek DSO that the im

[time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

Just to get this data on the list. Here are the measured voltages on U1: Pin Fn Voltage Limits 9Beam I0.0011.01 to 3.73 18 Ion Pump E2.4361.72 to 3.01 7Ion Pump I0.0200

[time-nuts] Fw: DIY Choke Ring Antennas?

This response didn't make it to the list for some reason. Hi Don, > >Would you care to elaborate?  Remember, I know nothing about this other than >what I can read on that guy's site.  I guess I'm looking for ~63mm height?  >What part are you talking about soldering?  The seam?  And what do you

[time-nuts] FW: [ntp:questions] Start of new GPS 1024 week epoch

David Malone is on the ball Magnus, he replied to your post with a patch for nnmea refclock drver... The changes to reclock_nmea will be interesting to see over next few weeks.. I do hope it is officially picked up, as there are a lot of people stranded in 1993! --marki -Original Message-

[time-nuts] FW: Rb video

This link works. The one with ** in it doesn't. John K1AE -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eric Garner Sent: Wednesday, August 07, 2013 3:57 PM To: Steve G8EBM; Discussion of

Re: [time-nuts] Fw: New to list and GPSDO questions

is where it will be when your correction takes effect. Stanley - Original Message - From: "Chris Howard" To: ; "Discussion of precise time and frequency measurement" Sent: Thursday, June 13, 2013 8:58 PM Subject: Re: [time-nuts] Fw: New to list and GPSDO questi

Re: [time-nuts] Fw: New to list and GPSDO questions

- > From: Chris Howard > To: mccor...@ptialaska.net; Discussion of precise time and frequency > measurement > Cc: Bob Stewart > Sent: Thursday, June 13, 2013 8:58 PM > Subject: Re: [time-nuts] Fw: New to list and GPSDO questions > > > I'm with Bob in that I don't really

Re: [time-nuts] Fw: New to list and GPSDO questions

I'm with Bob in that I don't really understand this description. And what are we trying to be in phase with? the 1PPS? Is it possible to reproduce the actual phase of the clock in the GPS birds once it has been through my GPS and come out as 1PPS? I picture the EFC steering the car straight down

Re: [time-nuts] Fw: New to list and GPSDO questions

OK, I believe you.  I can see I have a lot to learn. Bob - Original Message - > From: Richard H McCorkle > To: Bob Stewart ; Discussion of precise time and frequency > measurement > Cc: > Sent: Thursday, June 13, 2013 7:04 PM > Subject: Re: [time-nuts] Fw: New

Re: [time-nuts] Fw: New to list and GPSDO questions

ssion of precise time and frequency >> measurement >> Cc: >> Sent: Thursday, June 13, 2013 5:51 PM >> Subject: Re: [time-nuts] Fw: New to list and GPSDO questions >> >> Hi Bob, >> >> The VE2ZAZ controller is a frequency locked loop th

Re: [time-nuts] Fw: New to list and GPSDO questions

Hi Bob, The VE2ZAZ controller is a frequency locked loop that keeps the source on frequency but over time the phase drifts, as past corrections are not compensated for. When the system is stable every 16 seconds the 16-bit counter rolls over 2441 times with an extra 26624 counts (6800 HEX). The pr

Re: [time-nuts] Fw: New to list and GPSDO questions

cCorkle > To: Bob Stewart ; Discussion of precise time and frequency > measurement > Cc: > Sent: Thursday, June 13, 2013 5:51 PM > Subject: Re: [time-nuts] Fw: New to list and GPSDO questions > > Hi Bob, > > The VE2ZAZ controller is a frequency locked loop that keep

[time-nuts] Fw: New to list and GPSDO questions

Atilla, Isn't the VE2ZAZ circuit functionally equivalent to your example 3?  Granted, he's not picking the 10 millionth transition and checking its phase difference to the reference, but I've only got a 1PPS reference with a 1uS or so jitter from pulse to pulse.  Bert is averaging over 16 se

[time-nuts] FW: AD9830 DDS question

> -Original Message- > From: Chris Stake [mailto:st...@btinternet.com] > Sent: 10 May 2013 02:01 > To: 'Discussion of precise time and frequency measurement' > Subject: RE: [time-nuts] AD9830 DDS question > > Hi, > Seems to work OK for me. (Win7/32, IE9) I noticed Java is mentioned, it >

Re: [time-nuts] Fw: Rubidium Lamp PIX

On 30/12/12 00:33, Joe Leikhim wrote: I wonder if a small laser like those salvaged from a CDR writer would be effective at evaporating the rb? I doubt it. 250 mW laser compared to my (small) 300 W heat-gun? It took some time to heat the rubidium up to achieve the effect. Too little power, an

Re: [time-nuts] Fw: Rubidium Lamp PIX

Subject: Re: [time-nuts] Fw: Rubidium Lamp PIX Message-ID:<50defae6.6040...@erols.com> Content-Type: text/plain; charset=UTF-8; format=flowed Should be easy enough for you to figure out. The idea is to evaporate any rubidium that is blocking the light from leaving the bulb and ma

Re: [time-nuts] Fw: Rubidium Lamp PIX

Hey, thanks, Chuck. I think I have a couple of candidates. Soon as I get some time. . . Don Chuck Harris > Should be easy enough for you to figure out. The idea is to > evaporate any rubidium that is blocking the light from leaving > the bulb and making a straight path to the filter cell, and > u

Re: [time-nuts] Fw: Rubidium Lamp PIX

Chuck hit the nail on the head. Thats what I have done and it restores the bulbs nicely. I have seen both the darkened area and actually a silver-ish glob that when heat moved around and finally evaporated. Paul WB8TSL On Sat, Dec 29, 2012 at 9:15 AM, Chuck Harris wrote: > Should be easy enough

Re: [time-nuts] Fw: Rubidium Lamp PIX

Should be easy enough for you to figure out. The idea is to evaporate any rubidium that is blocking the light from leaving the bulb and making a straight path to the filter cell, and ultimately the detector end of the package. Look at the bulb on the side where the light must exit, and if it is s

Re: [time-nuts] Fw: Rubidium Lamp PIX

this would be even better with some arrows showing where to put the heat to heal the lamp! Don cdel...@juno.com > > > > Here is a PIX of various Rubidium lamps. > >>From the left top, > > Tracor EG&G LPRO 5065A R20 FRS PRS10 > > bottom two are FRK > > I'll see if Tom Van Baak will add th

Re: [time-nuts] Fw: Cell timing error

Dec 2012 22:58:39 To: Discussion of precise time and frequency measurement Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Fw: Cell timing error On 15 Dec, 2012, at 21:30 , gary wrote: > This is a shot of the GPS timing rack in an AT&

Re: [time-nuts] Fw: Cell timing error

On 15 Dec, 2012, at 21:30 , gary wrote: > This is a shot of the GPS timing rack in an AT&T shack. >> http://www.lazygranch.com/images/att/att_3.jpg Yes, the TruePosition box helps compute handset locations for E911 and whomever else wants to know where your phone is. This isn't a unit you would

Re: [time-nuts] Fw: Cell timing error

My Starloc was a pull from a wireless shack. We should have DGPSOs up to our armpits, but I guess most were crushed. This is a shot of the GPS timing rack in an AT&T shack. http://www.lazygranch.com/images/att/att_3.jpg ___ time-nuts mailing list --

[time-nuts] Fw: Cell timing error

GSM sites do indeed have GPS antennas. But Dennis is correct; all of them use GPS for E911 compliance, the GSM standard wasn't up to that task so sites have an outboard box (LMU - Location Messaging Unit) which provides E911 Location independent of the actual cell site base station. By the way

[time-nuts] FW:

Hi friend! http://jesusmylifechurch.org/poganini112.html?dtopicid=1ynuo ___ 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] Fw: What's the easiest way to divide by 10 for Thunderbolt reference output?

Dave M wrote: From: Chris Wilson Ready made or to be built? Use a divide-by-10 (7490-like) set to divide with 50% duty cycle or divide by 5 then by 2. Thanks for the reply Azelio. Sorry, should have said, ready built, got too many half finished jobs on the go right now. FAR too many accor

[time-nuts] Fw: WG: Tele Quarz Group OCXO

Hi Detlef, this item is not an OCXO but a TCXO. Accoding to my memory the stability is +-0.3 ppm over about 0°C to +50°C, it has 5 V supply and a CMOS/TTL output You can see the pin connections in the attachment (Option E). The trimmer is 20 kOhm. I wish you much fun with the part. Best regards

[time-nuts] Fw: Ofcom Update: GPS Jamming Notice (UK)

NOTIFICATION OF GPS JAMMING EXERCISES STANFORD TRAINING AREA, EAST ANGLIA, 26th MARCH 2011 Dates: Between 26th and 30th March 2012 inclusive. Times: 0800 - 1700 GMT. Location of MULTIPLE jammers: Land based within 5km of N52° 29.0' E000° 45.0'. Frequency: A 24 MHz band centred around 1575.42MH

[time-nuts] Fw: Bulletin C number 43, leap second June 30

There will be a leap second the end of June 2012. John WA4WDL -- From: "IERS EOP Product Center" Sent: Thursday, January 05, 2012 9:16 AM To: Subject: Bulletin C number 43 INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)

[time-nuts] FW: "The GPS navigation is the weakest point,"

Jim, Are you sure that wasn't the April edition of that mag? Nic Arriving this week, IEEE Magazine this months issue has an article about pilot-less commercial airliners, comparing the UAV drone technology as being readily available to fly paying passengers from here to there. ___

[time-nuts] Fw: Clocking a PIC16F628A from a Rubidium Standard

- Forwarded Message - From: Robert Atkinson To: Orin Eman Sent: Saturday, 26 November 2011, 12:21 Subject: Re: [time-nuts] Clocking a PIC16F628A from a Rubidium Standard Hi, Absolute max I understand, but even at 10% of Abs max you have 2mA, a significant current and more than eno

[time-nuts] Fw: Prologix GPIB adapter w/Tektronix TDS320

Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: shali...@gmail.com Date: Sat, 10 Sep 2011 11:44:22 To: ; Time-Nuts Reply-To: shali...@gmail.com Subject: Re: [time-nuts] Prologix GPIB adapter w/Tektronix TDS320 On the TDS 210 and 220, the bitma

Re: [time-nuts] Fw: Tbolt LCD Monitor - No DAC reading

Didier, I suspect that the negative voltage issue might be something of a blind alley as I would expect more people to be affected than have reported an issue - nevertheless it's worth a try. Just let me know when you have an opportunity to use the data and I can provide it. The host PC here us

[time-nuts] Fw: Tbolt LCD Monitor - No DAC reading

Forgot to copy the list... Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: shali...@gmail.com Date: Thu, 12 May 2011 13:07:13 To: David Bobbett Reply-To: shali...@gmail.com Subject: Re: [time-nuts] Tbolt LCD Monitor - No DAC readi

[time-nuts] Fw: your 'quake

Hi All I though you might like to hear our member Steve Rooke is a survivor in Christchurch. This just received from him. Alan G3NYK - Original Message - From: "Steve Rooke" To: "Alan Melia" Sent: Thursday, February 24, 2011 6:55 AM Subject: Re: your 'quake > Hi Alan, > > How's things

[time-nuts] Fw: Human Clock

We have had much about wrist watches, perhaps you will forgive the rather naughty clock (Human Clock), that is attached ! Trust you will be amused. Roy --- Begin Message --- ---Original Message--- From: [1]Winslow, Michele Date: 18/02/2011 08:22:53 To: [2]Ray P

Re: [time-nuts] FW: E5500 phase noise test set

ailto:time-nuts-boun...@febo.com] On Behalf Of Adrian Sent: Wednesday, December 15, 2010 6:50 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FW: E5500 phase noise test set The link didn't work, so I searched for PCI20428 and found this: http://www.bedogm

Re: [time-nuts] FW: E5500 phase noise test set

ee it it has analogue or TTL signals and start from there. Regards, Robert G8RPI. --- On Wed, 15/12/10, Clive Green wrote: From: Clive Green Subject: [time-nuts] FW: E5500 phase noise test set To: time-nuts@febo.com Date: Wednesday, 15 December, 2010, 12:03 Subject: Fw: E5500 phase nois

  1   2   3   4   >