[time-nuts] GPS Disciplined Oscillator FS

Yo Bubba Dudes!, Several years ago I bought a GPSDO from Hong Kong. It didn't lock even afer running for 24+ hours. The seller agreed to replace it BUT shipping was quoted at $175.  So I was stumped.  Now later the USPO will send it for $35 but the seller may be long gone and shipping anything

Re: [time-nuts] Cheap GPSDO with OCXO from aliexpress

What is the connector for RS-232 on that Chinese GPS receiver? Bob On Tuesday, September 10, 2019, 02:00:20 PM PDT, Andrew Kohlsmith (mailing lists account) wrote: Good afternoon, Adam, > On Sep 10, 2019, at 9:49 AM, Adam Kumiszcza wrote: > Here I found some info about it: >

Re: [time-nuts] Trying to setup HP 3048A Phase Noise test system.

I opted for buying the HT Basic software. It works great, just like you have an HP9836, etc. I bought the recommended NI GP-IB dongle. I've only run the 11848/3561 combo, although I also have an 11729 and an 8662. Certain routines like the built in verification test fail to run even with my

Re: [time-nuts] Cheap GPSDO with OCXO from aliexpress

Good afternoon, Adam, > On Sep 10, 2019, at 9:49 AM, Adam Kumiszcza wrote: > Here I found some info about it: > https://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/ > > OCXO is said to be bliley nvg47a1282 >

[time-nuts] Trying to setup HP 3048A Phase Noise test system.

I have hardware including 3561A DSA, 11848A Phase Nose Interface, 8662A and 8663A generators, 11729C Noise Test Set. Wanting to get software running. Considering both HP Basic code running on HT Basic Demo version, MS DOS opt 301 s/w and/or PN3048 windows version from John Miles. Anyone have

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

Hi Dave I posted the question as I am not up to speed with the latest solutions But I want the lowest phase noise that is easily possible so you might be correct as it is to lock up a 10 Ghz receiver but later for a 120 Ghz receiver Regards Paul -Original Message- From: time-nuts

Re: [time-nuts] Hp10811 parts ref

Gilles, what manual you refer? (Part number) Heating transistor are NPN.TO220 similar to TIP120 Driver is Q6 and NPN similar to 2N3904 U1 is LM2904N U3 is uA208M Luciano Da "time-nuts" time-nuts-boun...@lists.febo.com A time-nuts@lists.febo.com Cc Data

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

On 10/09/2019 17:00, time-nuts-requ...@lists.febo.com wrote: > Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz Why not just create a comb of frequencies based on the 5 MHz input, then filter and extract the 10 and 25 MHz signals you want, amplify and distribute as needed?  Going the PLL route seems

Re: [time-nuts] Cheap GPSDO with OCXO from aliexpress

Here I found some info about it: https://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/ OCXO is said to be bliley nvg47a1282 . GPS is NEO-M8T probably? There's

[time-nuts] Two HP 5061A Cesium units still for sale

Thanks for looking. Please reply to this off list to my email jwsmail < at > jwsss dot com I have for sale two remaining HP 5061As.  One is sold. These two both run as far as the oscillators, but only one locks at 10mhz running at this time. https://imgur.com/gallery/SuPZqJL (in

[time-nuts] Hp10811 parts ref

Dear list, Looking forward to apply the oven configuration of the 10811 oven oscillator - that is working so well - could you please help me identifying the appropriate references for the active parts : Q7 and Q8 heating darligntons PNP Q4 driving transistor PNP U1 and U3 op amps >From the

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

Not sure if it's using the same device, may be ICS501... but this appears to be the same functionality a bit cheaper: https://www.ebay.co.uk/itm/Clock-Multiplier-Module-Frequency-Multiplier-Module-2-50MHz-NEW/283386087346 I haven't tried one yet... On 10/09/2019 07:51, djl wrote: > I looked for

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

Don, don't worry too much about soldering the 8-pin SOIC's. You've been soldering 0.05" pitch TO-92's for decades. And each 4-pin side of a SOIC is 0.05" pitch as well. Rather than use an adapter with perfboard, I'd advise going with dead-bug with all grounded SOIC pins going straight to copper

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

I looked at all of the details and a breakout board works. These are SOIC-8's so the pin spacing is 1/2 of a normal IC. Believe .05". But still solderable. The NB3N502 is just a bit cheaper then the others and at least a bit of application data is out there. Another approach would be dead bug

Re: [time-nuts] Cheap GPSDO with OCXO from aliexpress

The BG7TBL design (that happens to be the designer's ham call sign) is also available on eBay in various versions.  I do have one. Seems to work.  The problem I have with it is that it only outputs NMEA from the GPS receiver.  There is no lock info from the serial port. David N1HAC On 9/10/19

Re: [time-nuts] Cheap GPSDO with OCXO from aliexpress

I'd say that for the low price, the critical component (OCXO) can't be a very good one. It's too bad that the seller offers no real specifications (and that he/she doesn't write very good English). I'll be "listening" with interest. Dana On Tue, Sep 10, 2019 at 7:32 AM Adam Kumiszcza wrote:

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

I looked for breakouts/eval boards for these. Only one I found was $250.00 nuts. maybe an 8=pin SOIC adapter board will do the job? found on dear ol' Amazon for cheap. Don On 2019-09-09 15:24, Paul Bicknell wrote: Hi all thank you I have now printed out the dater sheets for The ICS570B

[time-nuts] Cheap GPSDO with OCXO from aliexpress

Hi! I've found an interesting product on aliexpress: https://www.aliexpress.com/i/33055900193.html?spm=2114.12057483.0.0.1f6e7820MBFZQZ GPSDO allegedly with OCXO, 1PPS and 10MHz BNC output, RS232 output of NMEA and PPS, LCD screen. I see that there are many similar devices there. Did anybody