[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 ma

[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 wide

Re: [time-nuts] tcxo

http://www.romanblack.com/xoven.htm Joe Gray W5JG On Sun, Dec 7, 2014 at 1:53 PM, folkert wrote: > Hi, > > I'm experimenting a bit with time keeping. > For that I use cheap low power hardware like raspberry pies and > arduinos. > I noticed that the accuracy of a crystal makes a big difference.

Re: [time-nuts] WTT New Lucent GPSDO set

Yellow fin? Are we talking tuna? Joe Gray W5JG On Sat, Nov 29, 2014 at 7:08 PM, Perry Sandeen via time-nuts wrote: > List, > My two new OEM Lucent sets arrived today. As I suspected from reading the > previous posts, they are a total kettle of fish different from the older > *yellow finned*

Re: [time-nuts] Minicircuits 10% discount in December

Mouser carries a selection from Fair-Rite. They don't make it easy to find a specific part number, however. http://www.mouser.com/Fair-Rite/Passive-Components/EMI-RFI-Components/EMI-RFI-Suppressors-Ferrites/Ferrite-Toroids-Ferrite-Rings/_/N-bw7t9?P=1z13m3cZ1yxh9di Joe Gray W5JG On Thu, Nov 27,

Re: [time-nuts] 10 MHz Filters

Perry, Just three days ago, I posted about my using transformers from Ethernet cards. I also summarized the results of some measurements using the spectrum analyzer. There was only one response, so it seems that what I posted was widely ignored. Dave M - good find on Electronic Goldmine. Joe Gr

Re: [time-nuts] LTE Lite SkyTraq chip info

Thanks for the link. The Navspark also uses a Venus GPS, but I don't know if it the same one. I can't look it up at the moment. Joe Gray W5JG On Nov 25, 2014 3:02 PM, "paul swed" wrote: > Here is a link to a company that at least shares details of the SkyTraq > venus 8 chip on the LTE-Lite. The

Re: [time-nuts] LTR-Lite GPS

Yes, I know that NMEA is standard. I assumed that your board was also putting out proprietary messages.sounds like not. Joe Gray W5JG On Nov 25, 2014 2:50 PM, "S. Jackson via time-nuts" wrote: > NMEA is a company-independent format.. and the uBlox application is nice. > > > In a message dated

[time-nuts] LTR-Lite GPS

Looking closely at the board, I see it uses a Venus GPS chipset. And yet folks here are using the ublox ucenter software with it. What am I missing? Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com

Re: [time-nuts] anyone tried the cheap Lea-6T modules seen on eBay?

I bought one of those recently. I haven't done more than power it on to see if it works. I will probably look at it more over Thanksgiving. Joe Gray W5JG On Nov 25, 2014 9:15 AM, "Mike Cook" wrote: > You may have seen them as in > < > http://www.ebay.fr/itm/Ublox-LEA-6T-GPS-Module-w-Compass-for-

[time-nuts] Distribution amps and isolation transformers

Although my current project doesn't have the strict requirements that many of you have, I thought I would mention part of it, due to the recent talk of distribution amps. I am putting one of the FE5680A's that I bought a while back into a permanent home. I have a nice box from a gutted HP microwav

Re: [time-nuts] rs-422 rs-232 to fast ethernet converter

Didier has a good suggestion as to the serial to Wifi adapter. I may order one for my Z3801. Looking on Amazon, I see these two units that are more reasonably priced: http://www.amazon.com/Keynice-Ethernet-Intelligent-Communication-Wireless/dp/B00JTUVA0G/ref=pd_sim_sbs_e_1?ie=UTF8 http://www.amaz

Re: [time-nuts] GPS in the news

look at it, I have a kind of notion of what they imply one >> should look for, but it's not really well described exactly what to expect, >> but maybe it becomes clearer on a quality read-through. It is more >> suggestive than detailed method proposing, enough to show the

Re: [time-nuts] GPS in the news

Yes, I read that yesterday. It will be interesting to hear what the outcome of the study is. Joe Gray W5JG On Tue, Nov 18, 2014 at 4:59 AM, Charles Steinmetz wrote: > Dark matter the source of GPS irregularities? > >

[time-nuts] Si5351A

Some of you have probably already heard of this new clock generator chip from Si. News of a board with this chip from Adafruit just came up on a local Amateur list today. A quick Google shows that some folks have used this chip in homebrew SSB rigs. My concern would be that when this chip generate

Re: [time-nuts] 10 MHz OCXO recommendations

> If 0.2 ppm over a narrow range is the objective, that sounds like a TCXO application. Please point me to such a TCXO at 14.4 MHz that is affordable. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.

Re: [time-nuts] 10 MHz OCXO recommendations

> You can run at 400 KHz by dividing by 5/5 and 4/9. True. Either will work. > You said "0.2ppm stability". What do you need for accuracy and/or how are you going to calibrate your setup? I will initially calibrate the OXCO against my HP GPSDO. Idealy, it will only need checking against the GPS

[time-nuts] 10 MHz OCXO recommendations

>From the current crop of ebay OCXO's available, what have you actually used that you would recommend for the following? Sine output, either 5V or 12V, better than 0.2ppm stability after warmup. I plan on putting things in a sealed box, so there shouldn't be too wide a temperature fluctuation. Ever

Re: [time-nuts] Electrolytic Capacitor Question

I bought one of those ESR testers some time ago. It works very well. It is from Russia, but ordering from Brooke is much easier :-) Joe Gray W5JG On Mon, Nov 10, 2014 at 6:51 PM, Brooke Clarke wrote: > Hi Perry: > > (shameless plug) Have you measured the tantalum caps? > I sell a combined ESR

Re: [time-nuts] Divide by five

by 5 > at 125 MHz see here http://ecee.colorado.edu/~mcleod/pdfs/IADE/references/ > 74AC161.pdf to be sure to work at 125MHz run with 5,5 to 6V... > > 73 > Alex > > > > On 11/7/2014 1:12 PM, Joseph Gray wrote: > >> I need to divide a 125 Mhz clock by five. I have

[time-nuts] Divide by five

I need to divide a 125 Mhz clock by five. I have looked on Mouser and every chip I find is either obsolete or in SMT. Can anyone recommend a chip that is fast enough and comes in DIP? Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsu

[time-nuts] FS: HP 8662A

I believe that this should be of interest to some list members, due to the low phase noise of the 8662A. I don't want to spend any more time and money on this, so I'm selling it. The unit powers up and the status shows an error 10. Checking the output with my HP service monitor, I get a nice clean

Re: [time-nuts] HP5334 parport linux tool

This reminds me of a similar MSDOS utility that I bought years ago for talking to HPIB plotters via the parallel port. The software came with a cable. At the time, it was much less expensive than buying a GPIB card. Joe Gray W5JG On Sun, Nov 2, 2014 at 7:54 PM, Tom Wimmenhove wrote: > I just r

Re: [time-nuts] GPS for ntp

of you are pushing NTP to sub-microsecond limits, cheap > GPS/1PPS receivers like this are of interest. > > For more details, including almost medical-grade photos of a GPS patch > antenna, see: > http://leapsecond.com/pages/reyax/ > > /tvb > > - Original Message - > From:

Re: [time-nuts] GPS for ntp

3, 2014 at 2:41 AM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > On 2014-10-22 21:07, Joseph Gray wrote: > >> Now I'm confused. Both the ebay listing and the linked specsheet clearly >> state that the Ublox Neo-7N is used. Is this true or not? >> > &g

Re: [time-nuts] GPS for ntp

Now I'm confused. Both the ebay listing and the linked specsheet clearly state that the Ublox Neo-7N is used. Is this true or not? Joe Gray W5JG On Wed, Oct 22, 2014 at 2:50 PM, Tom Van Baak wrote: > > The USB interface will give you unpredictable timing and you still have > to hook > > up the

Re: [time-nuts] GPS for ntp

lator. > > On Mon, Oct 20, 2014 at 6:39 PM, Joseph Gray wrote: > > What does everyone think of this GPS module for ntp use? According to the > > specsheet, it uses a Ublox Neo-7N. > > > > > http://www.ebay.com/itm/RY725AI-10Hz-UART-USB-interface-GPS-Glonass-QZSS-ante

Re: [time-nuts] GPS for ntp

4BB > > > On October 20, 2014 8:39:16 PM CDT, Joseph Gray wrote: > >What does everyone think of this GPS module for ntp use? According to > >the > >specsheet, it uses a Ublox Neo-7N. > > > > > http://www.ebay.com/itm/RY725AI-10Hz-UART-USB-interface-GPS-

[time-nuts] GPS for ntp

What does everyone think of this GPS module for ntp use? According to the specsheet, it uses a Ublox Neo-7N. http://www.ebay.com/itm/RY725AI-10Hz-UART-USB-interface-GPS-Glonass-QZSS-antenna-module-flash-memory-/181562403752 I'm thinking about using it for a Beaglebone ntp server. I know there was

Re: [time-nuts] FE-5680 Linux command line tool

EPROM and the dump is 160K: > -rw-rw-r-- 1 tom tom 160K nov 8 2012 FE5680A_EEPROM.bin > > Which part in this dump is the actual data from the EEPROM? > > Thanks in advance. > > Regards, > Tom > > > > On Fri, Oct 10, 2014 at 12:21 PM, Joseph Gray wrote: >

Re: [time-nuts] FE-5680 Linux command line tool

I don't know how crowded the board is, but I would use an SMD DIP clip instead of unsoldering the chip. Joe Gray W5JG On Oct 10, 2014 8:30 AM, "Tom Wimmenhove" wrote: > I recently came across a thread on this list about undocumented FE5680 > commands. I have been using a little linux command li

Re: [time-nuts] WTB: GPS Antenna Splitter

Dave, I had a 4-port GPS splitter, but sold it. I got mine from eBay. It was an HP unit and I got it cheap. You need to watch for a good price on eBay. I see two HP 4-way splitters on eBay for $73. Search for GPS distribution. As for the antenna, I use an HP timing antenna. I see some Nokia timi

Re: [time-nuts] Looking for a particular OCXO....

http://www.amtronix.com/ Joe Gray W5JG On Mon, May 26, 2014 at 2:31 PM, Brian, WA1ZMS wrote: > I am trying to repair my HP-8920 RF Com test set since its internal > > 10MHz OCXO has aged way beyond the DAC EFC cal range. (There > > is no trimmer cap to allow adjustment.) > > > > The OCXO is 10

[time-nuts] FS: More stuff

Two more items to get rid of. HP 8590A SA. 10 KHz to 1.5 GHz, -115 dBm to +30 dBm. Very clean. The screen has no burn-in and is very bright. It has the tilt handle, but no front cover. Option 21 (GPIB) is installed. HP 54522A scope. 2 GS/s, 500 MHz dual channel. Channel 2 has a bad input attenuat

Re: [time-nuts] OT - Need a German speaker

Thanks to all who replied. It seems that the item is not available yet. When it is, I'll contact one of the members who offered to help. Again, thanks. Joe Gray W5JG On Sat, May 17, 2014 at 9:27 PM, Joseph Gray wrote: > Are there any German speakers who live in the USA on this list

[time-nuts] OT - Need a German speaker

Are there any German speakers who live in the USA on this list? I need someone to order me a small kit from a German web site. I'll pay you up front to order this for me. http://www.box73.de/product_info.php?products_id=945 It is a speech compressor kit that plugs into the mic of an FT-817. If yo

Re: [time-nuts] Stuff for free and for sale

Sorry, I didn't intend to clutter the list with that. It should have been a reply to an individual. Joe Gray W5JG On Tue, May 13, 2014 at 7:01 PM, Joseph Gray wrote: > The Fluke 8842 is already spoken for. > > Joe Gray > W5JG > > On Sun, May 11, 2014 at 9:45 PM, Jay Cox

Re: [time-nuts] Stuff for free and for sale

The Fluke 8842 is already spoken for. Joe Gray W5JG On Sun, May 11, 2014 at 9:45 PM, Jay Cox wrote: > On 5/11/2014 10:31 PM, Joseph Gray wrote: > > Hi Joe, > > I'd love to have the dead Fluke 8842 and would be happy to pay any shipping > charges. > > Regards >

[time-nuts] Stuff for free and for sale

I'm posting this to both the Time Nuts and Volt Nuts list, as some folks don't belong to both. I need to get rid of some items. It has gotten so cluttered around here that I can hardly get any work done. Several items are free for the cost of postage. These items are marked (postage). The rest of

Re: [time-nuts] Local Solar Time Clock

> And this lead me to a RTC module for $1.88 that will provide a time > that can be massaged with eq'n of time. Speaking of RTC modules, I don't know which one you found, but I have some of these on order for $2.29 each: http://www.ebay.com/itm/DS3231-AT24C32-IIC-Precision-RTC-Real-Time-Clock-Mem

Re: [time-nuts] Local Solar Time Clock

How about a Fred Flintstone wrist sundial? :-) Isn't that what he wore in the cartoon? Actually, the idea of a sundial clock that was mobile sounds pretty cool. Joe Gray W5JG On Sat, Jan 18, 2014 at 5:55 PM, Jim Lux wrote: > On 1/18/14 4:22 PM, Tom Van Baak (lab) wrote: > >> Add GPS if you w

Re: [time-nuts] Webinar: Phase Noise & Jitter Measurements by Rohde & Schwarz

> > From: Dr. David Kirkby > > To: Discussion of precise time and frequency measurement > > > > Sent: Thursday, October 3, 2013 9:35 AM > > Subject: Re: [time-nuts] Webinar: Phase Noise & Jitter Measurements by > Rohde& Schwarz > > &

Re: [time-nuts] Webinar: Phase Noise & Jitter Measurements by Rohde & Schwarz

I won't be available when this is live. Do you know if the video will be available afterwards? Joe Gray W5JG On Wed, Oct 2, 2013 at 9:26 AM, Dr. David Kirkby wrote: > I got sent an email about a Webinar, which is free (I like that!!!) on > next Wednesday (Oct 9th). > > http://mwrf.com/webinar

[time-nuts] A readl atomic wristwatch

http://www.ablogtowatch.com/bathys-hawaii-cesium-133-atomic-wrist-watch-accurate-second-1000-years/ But will TVB buy one? :-) Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listi

Re: [time-nuts] ThunderBolt Display - Update

Do all of us have to continue to be subjected to this pissing contest? Please quit or take it offline. Joe Gray W5JG On Thu, Sep 12, 2013 at 7:13 PM, wb6bnq wrote: > Dear Mr. Adam Maurer (VK4GHZ), > > It really has nothing to do with your accolades, accomplishments or the > number of posts ma

[time-nuts] Video about oscillator drift

Some may be familiar with this guy's video blog. I came across it not too long ago. While looking back through the old videos, I came across this one: http://www.eevblog.com/2010/02/14/eevblog-61-crystal-oscillator-drift/ Mostly basic stuff, but still interesting. The first thing that came to my

Re: [time-nuts] Star Box

#x27;s probably > > not going to work as well as an LEA-6T or even a LEA-5T. It might be > > competitive with a 4T or a 3T. > > > > Bob > > > > On Aug 15, 2013, at 10:47 PM, Joseph Gray wrote: > > > >> I just picked up a Star Box for $10. It has an A

Re: [time-nuts] Star Box

electronic stuff :-) Joe Gray W5JG On Sat, Aug 17, 2013 at 5:00 AM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: > Hi Joe, > > On 08/16/2013 04:47 AM, Joseph Gray wrote: > > I just picked up a Star Box for $10. It has an Allstar DGPS board > inside. I > > saw

[time-nuts] Star Box

I just picked up a Star Box for $10. It has an Allstar DGPS board inside. I saw several mentions of similar boards in the archives and I have found some documentation on the net. Has anyone actually used one of these in a GPSDO? Does it work any better than the usual Motorola, Rockwell, or other av

Re: [time-nuts] Warped back to 1993

I just checked by Z3801A which is being monitored by SatStat on an old laptop. Mine is showing the correct date and time. Joe Gray W5JG On Sat, Aug 10, 2013 at 8:53 PM, Hal Murray wrote: > > ma...@non-stop.com.au said: > > A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's

[time-nuts] DDS module

I have a few of those $5 AD9850 DDS modules from China. I'm going to use one to replace a crystal in a transmitter. I attached it to a TI MSP430 Launchpad and programmed a fixed frequency. Just out of curiosity, I wanted to see how stable this thing is. Using cellophane tape, I put a few pieces of

[time-nuts] How standards have changed

Another one, rejected for attachment size. https://dl.dropboxusercontent.com/u/19599147/QST%20May%201930.jpg A comment was made about how things have changed over the years regarding frequency accuracy. I am currently going through a scanned set of QST magazines that I borrowed and came across an

Re: [time-nuts] Oscillator temperature compensation...

Burt, Thanks for the information. I thought that the tolerance was supposed to 100 Hz, as You said. As far as I know, this is the original crystal that came with the rig when NMSU bought it. I will spend more time working with the rig this weekend. I am looking for a solid state LPB transmitter,

Re: [time-nuts] The first FMT

as 3.4 MB (too large for the list) so I put a copy > here: > www.leapsecond.com/tmp/1931-Sep-QST-FMT.pdf > > /tvb > > - Original Message - > From: Joseph Gray > To: Discussion of precise time and frequency measurement > Sent: Friday, June 21, 2013 7:26 PM >

Re: [time-nuts] The first FMT

That PDF shows 2.4 MB on this end. I guess the MIME encoding really bloats it. Joe On Fri, Jun 21, 2013 at 10:50 PM, Joseph Gray wrote: > Tom, > > Thanks, but I already reposted with links to that PDF and a followup. Feel > free to post a permanent copy of both. I will delet

[time-nuts] First FMT

More goodies from QST. Attached is an article about the very first ARRL Frequency Measuring Test. At just over 2 MB, that attachment was too big for the list. Find it here for a short while: https://dl.dropboxusercontent.com/u/19599147/QST%20Sep%201931%20-%20FMT.pdf And while I'm at it, here are

Re: [time-nuts] Oscillator temperature compensation

>Otherwise you might just as well lock it up instead. Hmm, a 1970 vintage tube transmitter with a GPSDO frequency lock :-) Thanks to everyone for the suggestions. I will spend more time with this rig and see what works. Joe Gray W5JG ___ time-nuts mail

Re: [time-nuts] Oscillator temperature compensation

Charles, you obviously are familiar with this transmitter. You don't happen to know where I can get a schematic, do you? Joe On Fri, Jun 21, 2013 at 5:07 AM, Charles P. Steinmetz < charles_steinm...@lavabit.com> wrote: > Joe wrote: > > I have an old AM transmitter that has three 6AL11 compactr

Re: [time-nuts] Oscillator temperature compensation

>Can you show some pictures of the oscillator? The wiring is point-to-point, so I don't think a picture is going to tell you much. >Is there a tunable inductor in the oscillator circuit? As I mentioned, nothing tunable there. >Who makes the unit? It is an LPB RC-6A carrier current AM transmitt

[time-nuts] Oscillator temperature compensation

This is not strictly Time Nuts, but it is about a crystal oscillator that needs some temperature compensation, or something. Please ignore this posting if you like. In fact, so as not to clutter up the list, it would be best to email me directly about this. I have an old AM transmitter that has th

Re: [time-nuts] Brooks Shera

Sad news. I wonder if his web pages will survive him. If not, the Internet Archive has archived the information. The latest is at: http://web.archive.org/web/20120823060601/http://www.rt66.com/~shera/ Joe Gray W5JG On Sat, Mar 23, 2013 at 1:48 PM, wrote: > Brooks Shera passed away last Saturday

Re: [time-nuts] lightweight webserver for, e.g., NTP widget

I used thttpd many years ago. It is tiny and fast. There are others. Joe Gray W5JG On Feb 11, 2013 3:01 PM, "Jim Lux" wrote: > I'm intrigued by the possibility of using a lightweight web server to > provide a management/user interface to test equipment or appliances (e.g. > like the NTP server r

Re: [time-nuts] Used Spectracom

Good info. I'll file it away in case I ever pick up a unit cheap. Joe Gray W5JG On Wed, Jan 16, 2013 at 1:11 PM, Charles P. Steinmetz wrote: > That's what I did with my 8163. You need to add a Wenzel-style two-PNP > squarer and use the squarer output to replace the internal 10 MHz VCO output >

[time-nuts] Used Spectracom

I find it amusing the number of Spectracom WWVB receivers that are on ebay lately. With the prices being asked, it looks like everyone is trying to dump these on the unsuspecting and make a killing on obsolete equipment. If they were dirt cheap, I'd probably pick one up. If you could wire in an ex

[time-nuts] OCXO DIP

I just ordered a few of these. They looked like a potential substitute for a larger OXCO in some applications. Does anyone have any experience with them? http://www.ebay.com/itm/NEW-10MHz-OCXO-DIP-Micro-Crystal-x1pc-5x10E-11-Oven-Oscillator-OCVCXO-GPSDO-/310380778466 Joe Gray W5JG __

Re: [time-nuts] Z3801A trouble

un, Jan 13, 2013 at 9:42 PM, Joseph Gray wrote: > Well, it sort of worked. Now it won't come out of holdover. It's > telling me "1 PPS CLK Invalid: Time RAIM error". It also says "GPS > 1PPS CLK Invalid". > > Joe Gray > W5JG > > On Sun, Jan 13, 2

Re: [time-nuts] Z3801A trouble

Well, it sort of worked. Now it won't come out of holdover. It's telling me "1 PPS CLK Invalid: Time RAIM error". It also says "GPS 1PPS CLK Invalid". Joe Gray W5JG On Sun, Jan 13, 2013 at 9:28 PM, Joseph Gray wrote: > Forcing the date on power up worked, alth

Re: [time-nuts] Z3801A trouble

Forcing the date on power up worked, although a bit strangely. I entered "2013,01,14" and got an "out of range" error. The date then showed as "14 Jan 2007" briefly, before showing "14 Jan 2013". Joe Gray W5JG On Sun, Jan 13, 2013 at 9:17 PM, Joseph Gray

Re: [time-nuts] Z3801A trouble

I just tried manually putting the unit into holdover and setting the date. Same error. I'll have to try power cycling. Joe Gray W5JG On Sun, Jan 13, 2013 at 8:57 PM, Hal Murray wrote: > > jg...@zianet.com said: >> I did that command earlier, but got an error. I just tried it again and I >> get t

Re: [time-nuts] Z3801A trouble

Hal, I did that command earlier, but got an error. I just tried it again and I get the same error: -221 "Settings conflict" Joe Gray W5JG On Sun, Jan 13, 2013 at 7:47 PM, Hal Murray wrote: > > jg...@zianet.com said: >> For a quick configuration, I installed SatStat on a laptop and hooked up a

Re: [time-nuts] Z3801A trouble

It has been years since I had to fool with setting up my Z3801A, so my memory may be a bit fuzzy on things. For a quick configuration, I installed SatStat on a laptop and hooked up a serial cable to the Z3801A. After completing a survey, I have GPS lock again. Although the UTC time is correct, the

Re: [time-nuts] 1970's flashback

Canterbury. These days it's a well known >> astronomical observatory run as part of Canterbury University Physics >> Department. >> Dave Brown >> Christchurch, NZ >> >> >> - Original Message - From: "Joseph Gray" >> To: "Dis

[time-nuts] 1970's flashback

Some time ago, a local Amateur gave me a CD with some radio related information. Also on the CD was some information from when he was in the Air Force. As it is Time Nuts related, some of you might find this of interest. I have posted the images in my Dropbox and will leave them there for a few day

Re: [time-nuts] Z3801A trouble

power on the 48v input. > You may find that 50-52vdc works. > > On Jan 13, 2013, at 0:14, Joseph Gray wrote: > >> After many years of faithful service, my Z3801A has stopped working. >> It seems to be going through a loop at powerup. All of the LEDs blink >> at o

[time-nuts] Z3801A trouble

After many years of faithful service, my Z3801A has stopped working. It seems to be going through a loop at powerup. All of the LEDs blink at once, then they blink in order, left to right. After several seconds, this is repeated. I'll have to clear the bench of the project I was working on so I can

Re: [time-nuts] 10 MHz -> 16 MHz clock multiplier

Don't leave us in suspense :-) What method did you decide to use? Joe Gray W5JG On Mon, Jan 7, 2013 at 8:54 PM, Tom Van Baak wrote: > A week ago I asked about a 10 MHz to 16 MHz multiplier. Thanks very much for > the suggestions and interesting discussion. > >> What's the simplest way to genera

Re: [time-nuts] Rockwell 12 Channel GPS Module TU00-D200-401

Oh, and I believe that model is only five channel. Joe Gray W5JG On Sat, Jan 5, 2013 at 7:28 PM, Joseph Gray wrote: > Yes, I saw those for $9 each and almost ordered a few. Then I realized > that this model doesn't have the 10 KHz output. Can the 10 KHz models > still be found,

Re: [time-nuts] Rockwell 12 Channel GPS Module TU00-D200-401

Yes, I saw those for $9 each and almost ordered a few. Then I realized that this model doesn't have the 10 KHz output. Can the 10 KHz models still be found, inexpensively? Joe Gray W5JG > -Original message- > From: Jim Broyles > To: time-nuts@febo.com > Sent: Sun, Jan 6, 2013 01:09:40 GM

Re: [time-nuts] An embedded NTP server

On Wed, Jan 2, 2013 at 12:37 PM, Poul-Henning Kamp wrote: > > Actually, the OS is not important, floating point support is. That is one reason that the recent crop of inexpensive ARM Cortex M4 experimenter boards is quite interesting. I picked up two of the TI Stellaris Launchpads on pre

Re: [time-nuts] Switching oscillators

Thanks for all the good suggestions. After further consideration, I think I'll just keep the equipment in standby until a sufficient time has elapsed for the OXCO to stabilize. That way I don't have to switch oscillators at all. The whole project will be controlled by a uC board anyway, so this wil

Re: [time-nuts] Switching oscillators

For my use, I don't think the switching glitch will be a concern. Most of the time, the equipment will be in a standby mode. There is a high probability that the OCXO will be in use most of the time. I guess my original idea of simply waiting a sufficient time for the OXCO to warm up and then swit

Re: [time-nuts] Switching oscillators

close to the internal oscillator. I suppose than could be done with a mixer > and glue circuitry. I don't think this is cheap though. > > > -Original Message----- > From: Joseph Gray > Sender: time-nuts-boun...@febo.com > Date: Sun, 9 Dec 2012 14:12:51 > To: Discu

Re: [time-nuts] Switching oscillators

; > > Sent from my Droid Razr 4G LTE wireless tracker. > > > > -Original Message- > From: Joseph Gray > To: Discussion of precise time and frequency measurement > Sent: Sun, 09 Dec 2012 3:13 PM > Subject: [time-nuts] Switching oscillators > > I have a de

[time-nuts] Switching oscillators

I have a device that has an internal TCXO. I want to feed it with an external OCXO, but I don't want to completely replace the TCXO. Here is the scenario. On initial power on, or after a power loss, I want the internal TCXO to be used. Once the OCXO is up, I want to switch to it. How could this be

[time-nuts] For Arduino lovers and haters

I'm posting this seemingly off topic information, because many times a Time Nut needs to do something with a microcontroller (witness the recent discussion about GPSDO's). Sometimes, you just want to throw something together for a quick test or for a temporary project... I have never used an Ardu

Re: [time-nuts] 12.8 MHz OCXO

g4jnt.com/DDSVHFBeaconDriver.pdf by G4JNT. It just scraped in under > $50 > > Dave > > Ww2r > > Message: 4 > Date: Sat, 24 Nov 2012 09:01:25 -0700 > From: Joseph Gray > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] 12.8 MHz

Re: [time-nuts] C-MAC hookup

and > they have a wide variety of packages > Alan > G3NYK > > - Original Message ----- From: "Joseph Gray" > To: "Discussion of precise time and frequency measurement" > > Sent: Saturday, November 24, 2012 3:21 AM > Subject: [time-nuts] C-MAC

Re: [time-nuts] 12.8 MHz OCXO

s > Special ham price EUR 98.00 (or equivalent in US-$ plus freight. Payment by > Paypal. > I am not sure, if the freight cost may kill the opportunity for you. > > Bernd > DK1AG > > -Ursprüngliche Nachricht- > Von: time-nuts-boun...@febo.com [mailto:time-nut

Re: [time-nuts] 12.8 MHz OCXO

Mike, Surprisingly, it isn' as uncommon as I first thought. The problem seems to be the cost, however. If I can't find something within my budget, I'll have to improvise. Joe Gray W5JG On Sat, Nov 24, 2012 at 1:53 AM, mike cook wrote: > > Le 24 nov. 2012 à 09:26, Joseph Gr

Re: [time-nuts] 12.8 MHz OCXO

er/128-mhz-crystal-oscillator-tcxo.html> > > or > > <http://www1.futureelectronics.com/doc/IQD%20FREQUENCY%20PRODUCTS/E4191LF.pdf> > > or even > > <http://cgi.ebay.com/310376642284> > > > Dave > -Original Message- > From: time-nuts-boun...@

[time-nuts] 12.8 MHz OCXO

Can anyone recommend an inexpensive 12.8 MHz OCXO that outputs a sine wave? I've looked online, but the only ones I find costs hundreds of dollars. Anything 0.25 ppm or better is fine. A Vcc of 5-13.8 VDC preferred. Joe Gray W5JG ___ time-nuts mailing l

[time-nuts] C-MAC hookup

A friend just got a C-MAC Sine 10MHz Double Oven Oscillator and asked me to see if anyone here knows how to hook it up and get it working. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/

Re: [time-nuts] Interesting crossover between time-nuttery and caving

It's interesting to see what new uses old technology can be put to when it gets small enough and inexpensive enough. In my caving days, 30 years ago, I wouldn't have wanted to drag an HP 5071A through a cave :-) Joe Gray W5JG On Mon, Nov 12, 2012 at 3:41 PM, Robert Darlington wrote: > This came

Re: [time-nuts] Rubidium as radio reference

t; > 73, > John > > On Oct 30, 2012, at 8:28 PM, Joseph Gray wrote: > > > I know that some here are Amateurs and have used external sources to > > provide a more accurate reference for a receiver. So, I have a noob > > question or two. > > > > Is the

Re: [time-nuts] Hackable hardware for timenuttery

Looks nice. Shame it doesn't go up to 500 MHz or more, though. If it did, I'd probably buy one at that price. I already have an MFJ 259B that only goes up to 170 MHz. Joe Gray W5JG On Wed, Oct 31, 2012 at 2:44 PM, Poul-Henning Kamp wrote: > > If one were to rearrange the input circuit a little b

Re: [time-nuts] Simple NTP server based on a Raspberry Pi

I ordered mine from MCM Electronics for $35. Still waiting for out. On Oct 30, 2012 2:03 PM, "paul swed" wrote: > Thanks was trying to figure out the difference and there was no detail on > the $25 version. > Look forward to seeing what if anything happens. > Regards > Paul. > > On Tue, Oct 30, 2

Re: [time-nuts] Simple NTP server based on a Raspberry Pi

I have read that there were a number of people having various USB problems. Some related to network, audio, etc. I understand that there is work being done on the USB software. I don't know if the latest version of Raspbian has fixed things or not. I'll be using a USB audio dongle when my R-Pi arri

Re: [time-nuts] Are serial port headers standardized?

I have seen at least three types over the years. The straight IDC crimp on both ends is the easiest and fairly common. Also common is the one with IDC on the motherboard end and a solder cup DB-9 on the other. In these, I mostly saw the wires soldered to alternate rows on the DB-9 (top, bottom, rep

Re: [time-nuts] RasberryPi, timing and GPS receivers

Coincidentally, I just ordered a R-Pi yesterday. I have other potential uses for it, not NTP. If you are not in a hurry, it is possible to find the Soekris boards on ebay for a decent price. I got one last year, in a case, for $50. Joe Gray W5JG ___ tim

Re: [time-nuts] Mouser connector

Wow, the Digikey price shot up as well. I guess I'll ebay a cable. Joe Gray W5JG On Sun, Oct 14, 2012 at 8:18 PM, wrote: > Actually they were Digikey part numbers... > > Didier KO4BB > > Sent from my Droid Razr 4G LTE wireless tracker. > > > > -----Original

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