[time-nuts] Re: GPSDO replacement recommendation

[David G. McGaw]

The only caution for the Samsung version is it has a bit different 
serial protocol, but Lady Heather version 6.14 knows how to talk to it.  
There is also a patch that helps - grounding pin 39 of the 50-pin 
connector to sync to the internal GPS PPS (this is true of all 
versions).  The Samsung is also very critical for supply voltage, 5V 
min, 5.5V max, to keep the power fail light off.  I have several of all 
versions.

David N1HAC

On 4/15/24 8:43 AM, Wilko Bulte via time-nuts wrote:
>     another option would be a Furuno GF-8705
>
>     ogp.png
>     [1]GF-8705 from FURUNO ELECTRIC (Multi-GNSS Disciplined Oscillator)
>     [2]qzss.go.jp
>
>     I obtained one for €40. It has a sensitive GPS rx, is fast to acquire
>     lock and is a compact, even smaller than the UCCM. For those that care:
>     it sports a programmable clock output too.
>
>     Downside: LH does not know about it. There is free Furuno software to
>     program and monitor it.
>
>     hth,
>
>     Wilko
>
>       On 15 Apr 2024, at 14:12, Wilko Bulte <wkb at xs4all.nl> wrote:
>
>     hi Atilla,
>     Assuming you can find one: the Samsung UCCM is form/fit compatible but
>     sports a much more sensitive GPS module. Fast satellite lock with
>     signal levels that made Trimble and Symm. UCCM modules very slow to
>     acquire lock.
>     I happen to own 2 of these Samsungs. Previously also had both a Trimble
>     and a Symm UCCM. The Samsungs were to stay.
>     hth,
>     Wilko
>
>       On 14 Apr 2024, at 15:17, Attila Kinali via time-nuts
>       <time-nuts at lists.febo.com> wrote:
>
>       Moin,
>
>       My house GPSDO (a Trimble UCCM) died recently and I am now looking
>       for a
>
>       replacement. As I have been a bit out of touch with the current
>       state
>
>       of affairs regarding GPSDOs, I'd like to ask what the current
>       recommendation
>
>       for getting a GPSDO is, these days.
>
>       Thanks in advance
>
>                 Attila Kinali
>
>       --
>
>       Science is made up of so many things that appear obvious
>
>       after they are explained. -- Pardot Kynes
>
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