[time-nuts] Has anybody checked this? GPSDO in kit

Bryan _ bpl521 at outlook.com
Sun Oct 23 17:27:41 EDT 2016


The link on EEVblog is  http://www.eevblog.com/forum/projects/a-look-at-my-symmetricom-gpsdo-(ocxo-furuno-receiver)/
the Symmetricom and the Trimble you referenced are almost identical in operation. Issue is receiving one that works, a bit hit and miss. Apparently the next version of Lady heather will be able to monitor it. With the Symmetricom you are somewhat limited to what settings you can apply to tweak it, at least as to what limited documentation is available to do so.  If you have a decent antenna and a good view of the sky you should be fine.


NOTE be careful with the voltages that may be quoted. The Trimble's are NOT 12v. search Time-Nuts for more info



-=Bryan=-


________________________________
From: time-nuts <time-nuts-bounces at febo.com> on behalf of Bob Camp <kb8tq at n1k.org>
Sent: October 23, 2016 6:56 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Has anybody checked this? GPSDO in kit

Hi

There is a *long* list of information on that unit over on EEVBlog. Bottom line is
that if you get a good one (you may not) it is a *much* better solution than the other
one you are looking at.

Bob

> On Oct 23, 2016, at 9:32 AM, Giuseppe Marullo <giuseppe at marullo.it> wrote:
>
> Thanks to all that have answered, as usual very good advices.
>
> I am puzzled about what to do, still the total cost of it for a OXCO + GPS(unit with antenna) + control mcu is 67usd, I doubt I could find anything like this for a cheaper price new.
>
> Only cheap alternative could be this one(already discussed here one year ago):
>
> http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649
[http://i.ebayimg.com/images/i/141734507722-0-1/s-l1000.jpg]<http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649>

Used Tested 10MHz Trimble 63090/73090/65256 GPS board OCXO | eBay<http://www.ebay.com/itm/141734507722?_trksid=p2057872.m2749.l2649>
www.ebay.com
Note : this item is used ,but Good quality. | eBay!



>
> Would this allow me to play as the "standard" ThunderBolt using the same software? Any preferred model among
> 63090/73090/65256 "models"?
>
> Giuseppe Marullo
> IW2JWW - JN45RQ
>
> PS: Still I like the idea of the kit...the trimble would require PSU, antenna, boxing and no fancy display...
>
>
> On 10/22/2016 4:02 PM, Giuseppe Marullo wrote:
>> Hello,
>>
>> I know, I know it is not supposed to be high end stuff(timenutted), but I was looking for a GPS clock and noticed that this could be a cheap GPSDO too:
>>
>> http://qrp-labs.com/progrock.html
ProgRock - triple programmable crystal - QRP Labs<http://qrp-labs.com/progrock.html>
qrp-labs.com
This kit is a simple minimalist controller for the Si5351A Synth kit (included with the ProgRock kit). It is intended as a programmable crystal replacement.



>>
>> It has a OCXO option, a box, a display(customizable), a GPS and could be probably fitted with a Raspberry Zero for a cheap NTP server too.
>>
>> Any advice?
>> Sorry if this has been already discussed here, didn't find any reference in the ML.
>>
>> Could it be compared to a Thunderbolt GPSO in terms of performance, how worse it could be?
>>
>> I just need a clean/self-calibrating  10MHz reference to tune HF radios ...seems good enough for the price.
>>
>> Giuseppe Marullo
>> IW2JWW - JN45RQ
>>
>>
>>
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>
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