Re: [time-nuts] Lucent RFTG-u REF-0 Standalone (Dan Watson)

I don't live in New Zealand. :) Dan > On Jun 29, 2017, at 1:05 PM, Gregory Beat wrote: > > Dan Watson (New Zealand) appears to have abandoned this Lucent KS-2436 Ref-0 > GPSDO project (standalone operation). > > Earlier this week, I noted Lucent KS-2436 units being sold on

Re: [time-nuts] TruePosition and Arduino Progress

Hi, Here's an interesting addition to the project once you get the serial parser and display driver worked out. It is quite easy to generate the $GPZDA NMEA message in your program. You can send this off to a Raspberry Pi or BBB along with the PPS signal and drive an NTP server. :) [image:

Re: [time-nuts] Mains Frequency Monitor with the PIC 16F1619

Hi all, Responding to a few comments: - The DC-DC converter has the same pinout as a 7805. It would be possible to substitute the linear regulator (as long as you handle the power dissipation of course). - I will likely switch to I2C for the LCD on the next revision. - Adding an input for an

[time-nuts] Mains Frequency Monitor with the PIC 16F1619

Hi all, A few months ago someone on the list made mention of the PIC 16F1619, prompting me to order a few to check out. It's an interesting little chip with some nice peripherals. I decided to do a mains frequency monitor project using it. The project is not quite complete, but you can read about

Re: [time-nuts] Electronic Goldmine ===> was: Re: DC-DC Converters

Hi, The "Electronic Surprise Boxes" they sell are fun to sort through. You will end up with a huge pile of junk resistors and such, but I have never been disappointed in the other goodies I found. One box I received contained about 40 oscillators in various frequencies. You often get a lot of

[time-nuts] A Very Interesting "Plock"

Hi all, I saw this article about a hand-made clock, and thought some of you might enjoy it. Called the Plock (plot clock), it is a 407-piece wooden clock that writes the time. You really just have to see it in action to appreciate it.

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

Hi all, I worked out the schematic for the CTS OCXO. You can find it here: http://syncchannel.blogspot.com/2016/03/schematic-of-cts-1960017-10mhz-ocxo.html Best regards, Dan W. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

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

mal gain. That > will most likely make the temperature performance significantly worse. See > the good old papers on the HP super ovens for all the details. > > Bob > > > On Feb 27, 2016, at 12:44 PM, Tom Miller <tmiller11...@verizon.net> > wrote: > > > > >

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

, Joseph Gray <jg...@zianet.com> wrote: > 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 Wats

[time-nuts] Inside a CTS 1960017 OCXO

Hi, I'm sure many of you are tracking the cheap CTS 10MHz OCXOs available on eBay right now. I purchased a case of them, and decided to crack one open. I took pictures along the way, thinking that might be interesting to the list. Here is the blog post if you are interested:

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

Hi, I had an interesting experience with a local cal lab when I took in my HP 5334B (Option 010). I'd recently purchased the unit and had no idea of its calibration history. At the time I wasn't quite a time nut, and I didn't own a reference to check frequency accuracy myself. I was hoping to get

Re: [time-nuts] Glass Envelope Quartz Crystals

a > PCB if they are tinned already. > > Tim N3QE > > On Mon, Feb 1, 2016 at 9:58 PM, Daniel Watson <watsondani...@gmail.com> > wrote: > > > Hi, > > > > I purchased a pair of interesting glass envelope crystals for a project. > > Here are some pictures:

[time-nuts] Glass Envelope Quartz Crystals

Hi, I purchased a pair of interesting glass envelope crystals for a project. Here are some pictures: http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html Does anyone have an idea about what mount/socket I should buy for these? I read a previous thread on the list about

Re: [time-nuts] Generating a solid PPS from 10Mhz source

I'm curious if that code will perform the intended function (down to the clock cycle) when compiled. A check in the simulator would be a good idea while the TIA is busy. If it doesn't give you the performance you are looking for, try programming it in assembly, as was done for the PicDiv. Dan

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi, Sadly my tbolt is sick as well. There is some fault that causes the processor to constantly reset. I already had the outer screws undone, so I popped open the case to look for the trimmer you need. There is indeed a solder blob on one side of the oscillator, under which I would presume is

Re: [time-nuts] Bad date out of HP Z3805A

Hi, It just so happens I've been playing around with GPS week rollover on the Tria GPS. I added an option to simulate the next rollover in 2019, and did some experimentation with a REF-0. With this being a current topic in this thread, I decided to do a quick write-up on it:

Re: [time-nuts] KS-24361 REF-0 standalone

Hi, It looks like Synergy makes some really nice devices. Actually, I now know first hand that they do. I'm sure their module would be an excellent choice for some applications. I've made some progress on my own REF-0 project and the Denuo GPS board. I've also decided to expand the scope and

Re: [time-nuts] UBLOX LEA-5T Programming?

Hi, The REF-0 will accept a PPS signal from a non-timing GPS. I use the u-blox NEO-6M for a lot of my testing. That module can be had in the $12 range online. I have also gotten the REF-0 to lock to a Venus GPS and an FE-5680B rubidium standard. Of course, using a less stable PPS signal will

Re: [time-nuts] KS-24361 REF-0 standalone

Gregory, Thanks for your comments. You are absolutely right that a timing GPS module is required to make this a proper Time-Nuts solution. I know that many on the list have been thinking the same thing when they read my posts. Cost alone is what has prevented me from going directly to that

Re: [time-nuts] New Symmetricom 58532A antennas - Launch3

Thanks for passing this along. That's quite a good price, assuming the shipping is reasonable. Is the 38dB of gain a little "hot" for some receivers? Dan > On Oct 1, 2015, at 3:19 PM, Gregory Beat wrote: > > I received this e-mail earlier today (below) from Launch3. >

Re: [time-nuts] KS-24361 REF-0 standalone

Hi, Here's a little progress report on my REF-0 project. Though there hasn't been a lot of activity in this thread recently, I do hope that some more people have successfully gotten their REF-0s up and running. My goal all along has been to retrofit a modern GPS into the REF-0. Over the past

Re: [time-nuts] Some results on a very interesting Sulzer OCXO

I recently scored some old Austron 5MHz oscillators at a military surplus store. They were listed at $10 each. (The price may have gone lower after I BSed with the owner for a while) One is a Sulzer model 1120N from 1972. The other is a Sulzer model 1150C from 1971. That 5 MHz oscillator has

Re: [time-nuts] KS-24361 REF-0 standalone

All, I hope some more of you have had luck getting your REF-0s running standalone. My earlier write-ups were focused on the bare minimum connections and code needed to make a REF-0 work. Of course, external connections are not ideal for long-term operations. The real end-state here is to have a

Re: [time-nuts] KS-24361 REF-0 standalone

All, I have posted some example code for running the REF-0 standalone. There is an Arduino sketch and some AVR C code. (Just in time for the weekend) http://syncchannel.blogspot.com/2015/08/example-code-for-ks-24361-ref-0.html I also did a quick write up recently about how I added the 10MHz

[time-nuts] Upgrading the Oncore GPS in the KS-24361 REF-1

All, I poked around inside the KS-24361 REF-1 today to see how easy it would be to replace/upgrade the Oncore GPS. I wasn't too successful, but I decided to write up my findings anyway. Perhaps the information will be useful to someone else as a starting point. BLUF: It's not nearly as easy as

Re: [time-nuts] KS-24361 REF-0 standalone

All, I have completed a write-up on how to make the REF-0 run standalone. As there is a lot to cover, I decided to split it up into two (or more) parts. This first part summarizes what is required on the interface pins, and details what I have discovered about the serial string timing. If you