[time-nuts] Cheap GPSDO with OCXO from aliexpress

[Bob Albert]

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) <aklists at mixdown.ca> wrote:  
 
 Good afternoon, Adam,

> On Sep 10, 2019, at 9:49 AM, Adam Kumiszcza <akumiszcza at gmail.com> 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
> <http://web.archive.org/web/20160725005042/http://www.mikrocontroller.net/attachment/107430/6891__NVG47A1282_RoHS.pdf>.
> GPS is NEO-M8T probably? There's supposed to be a PPS signal on RS232 port.

Be careful; These GPSDOs come from *many* vendors and the sources of the OCXOs are quite varied.

FWIW I have one coming in as well; my specific order is https://www.aliexpress.com/item/32944725914.html <https://www.aliexpress.com/item/32944725914.html>; You’ve already linked to the giant thread on EEVblog, the teardown for the one I bought is https://www.eevblog.com/forum/testgear/new-gpsdo-bg7tbl/msg1408842/#msg1408842.

My specific needs are just to have a (much) better reference than anything I have presently. It is my hope that this will perform that task.

-A.


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