[time-nuts] GPSDO project

Christophe Huygens christophe.huygens at cs.kuleuven.ac.be
Mon Jun 29 09:19:13 EDT 2009

Consider a 2nd hand low phase noise source like a

Best regards,

Brad Dye wrote:
> Many thanks to all who responded to my request for help on this project.
> The SDR-IQ (http://www.rfspace.com/SDR-IQ.html) already has a built-in 
> 66.6667 MHz osc, I just want to make it more stable and reasonably 
> accurate, as I use it as a general coverage HF receiver with a one-Hertz 
> read-out. There is a place for a surface-mount jack on the PC board -- 
> so that an external osc can be used -- although this feature is not 
> promoted by the manufacturer. This SDR does most of its own processing 
> in hardware and doesn't rely on a computer sound card as much as some 
> SDRs do.
> There was one response, offering a kit to do what I need, but it 
> requires more test equipment for tuning and calibration than what I have 
> available. I am still looking for a simple, completed oscillator that 
> will accept 10 MHz from a Thunderbolt GPS receiver and supply 66.66666 
> MHz for my SDR as described here:
> http://www.braddye.com/gps_do.html
> My background is in radio paging where we use GPS receivers to keep our 
> 900 MHz transmitters on frequency for simulcast operation. I really 
> appreciate the time everyone took to offer suggestions.
> 73s
> Brad Dye, K9IQY
> Springfield, Illinois
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