Re: [time-nuts] Cheap GPSDO's

2016-03-03 Thread Nick Sayer via time-nuts
> On Mar 2, 2016, at 6:00 PM, Keith Loiselle wrote: > > Below are some comments from Said: > >>> The TCXO variant is powered by an LDO rather than a switcher, FWIW. > > The published schematics only showed the DC-to-DC switcher version, sounds > like the TCXO version

Re: [time-nuts] Cheap GPSDO's

2016-03-02 Thread Keith Loiselle
Below are some comments from Said: >>The TCXO variant is powered by an LDO rather than a switcher, FWIW. The published schematics only showed the DC-to-DC switcher version, sounds like the TCXO version should have better PN and spur performance with an LDO. >>In my bench experiments with the

Re: [time-nuts] Cheap GPSDO's

2016-03-02 Thread Nick Sayer via time-nuts
> On Feb 25, 2016, at 12:41 PM, Keith Loiselle wrote: > > Below is a message Said asked me to forward to the group: > > > Gents, > > > > While I haven’t posted here for a while, I have been following Time Nuts. > One recent post caught my attention, and here are

Re: [time-nuts] Cheap GPSDO's

2016-02-29 Thread Keith Loiselle
Below is a message Said asked me to forward to the group: Gents, While I haven’t posted here for a while, I have been following Time Nuts. One recent post caught my attention, and here are my comments. There are some serious basic design issues with Nick Sayers’ GPSDO hack mentioned by

[time-nuts] Cheap GPSDO's

2016-02-12 Thread Alan Ambrose
>>> For more money, yixunhk has some nicely packaged units and AFAIK he has a >>> good reputation. BTW I have a '58503A' from him. It did and does (a year later) still work, although it took me a while to get it going. But it was a bit iffy - obviously in a re-made case and the eBay images

[time-nuts] Cheap GPSDO's

2016-02-11 Thread Joseph Gray
I searched the list archives and found some discussion mid-to-late last year about several inexpensive GPSDO's made by bg7tbl. It seems that all of the better models (according to discussion on the EEVBlog forum) are gone. I do find two similar units currently listed:

Re: [time-nuts] Cheap GPSDO's

2016-02-11 Thread John Green
That last one sure looks interesting. I have one that is similar to the Trimble units that have been discussed, but was made by Symmetricom. About all I can say right now is that it *seems to work. I'll know more after I have compared it to the Z3801.* On Thu, Feb 11, 2016 at 1:13 AM, Joseph Gray

Re: [time-nuts] Cheap GPSDO's

2016-02-11 Thread Azelio Boriani
The last you mention is a FEI PicoSync with the even second (PP2S) output. Usually, for time-nuts purposes (and if it will be your first GPSDO), it is better to have a pulse-per-second (PPS) output, On Thu, Feb 11, 2016 at 8:13 AM, Joseph Gray wrote: > I searched the list

Re: [time-nuts] Cheap GPSDO's

2016-02-11 Thread Attila Kinali
On Thu, 11 Feb 2016 00:13:20 -0700 Joseph Gray wrote: > I searched the list archives and found some discussion mid-to-late > last year about several inexpensive GPSDO's made by bg7tbl. It seems > that all of the better models (according to discussion on the EEVBlog > forum) are