[time-nuts] GPSDO - was - oscillator choice question

Richard W. Solomon w1ksz at earthlink.net
Mon May 17 21:52:47 UTC 2010


Will the boards be available for purchase ? I would like to 
build two of them.

73, Dick, W1KSZ


-----Original Message-----
>From: ernieperes at aol.com
>Sent: May 17, 2010 4:58 PM
>To: time-nuts at febo.com
>Subject: Re: [time-nuts] GPSDO - was - oscillator choice question
>
>
>
>Hi,
>
>there is a modified W5OJM  GPSDO and all the PCB and so on......please see the flwng link
>
>http://pagesperso-orange.fr/f5cau/base_temps_gps_f5cau/page_basegpsF5CAU.htm
>
>Basically a well designed mods of the above idea.......and no special parts..... and it runs from 10MHz.....
>
>Rgds Ernie.
>
>
>
>
>
>
>-----Original Message-----
>From: Bob Camp <lists at rtty.us>
>To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
>Sent: Mon, May 17, 2010 3:40 am
>Subject: Re: [time-nuts] GPSDO - was - oscillator choice question
>
>
>Hi
>Part of the issue is that some of the thinking on GPSDO's dates back to the era 
>f selective availability on GPS.  Designs from that era need to be upgraded to 
>eally get them to be all they can be with SA turned off.
>Bob
>
>n May 16, 2010, at 9:19 PM, Stanley Reynolds wrote:
>> Parts for the Brooks Sheera W5OJM design are getting hard to find also need 
>he extra divider mod for the 10 Mhz OCXO
> 
> The James Miller G3RUH design is popular for simple if you have the right GPS 
>eceiver with 100Khz out.
> 
> VE2ZAZ design has a few issues with ground loops ( a fix is out there) and 
>sing the same buffer for all outputs, may also need a buffer amp for the 10811, 
>nother mod would be a separate voltage regulator for the ECC voltage.
> 
> I think all three designs would fall short for most on the list, but for me it 
>s hard to tell the difference.
> 
> Did you have another design in mind ?
> 
> Stanley
> 
> 
> <snip>
> 
> 
> Now I am reading Time-nuts history and I see that
> there is no consensus on which of the popular/published GPSDO
> configurations is the best return on effort and expense.
> That is rather disappointing.
> 
> Any comments on that before I just flip a coin?
> 
> <snip>
> 
> 
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