Thread: Homebrew GPSDO
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Old 3rd Mar 2021, 5:52 pm   #10
mole42uk's Avatar
Join Date: Aug 2010
Location: Bristol, UK
Posts: 2,142
Default Re: Homebrew GPSDO

Originally Posted by jimmc101 View Post
A really cheap way to check the 10MHz would be one of the GPS modules using the u-blox NEO-7M
Of course, that has set me off on a new quest - designing a GPSDO using one of the NEO-7M devices, setting the output to 10MHz, then using that and the output of the 10MHz OXCO into a frequency comparator to drive the adjustment on the OXCO..... with a suitable low-pass filter it should ignore the jitter on the NEO-7M and, by using a very stable power supply, give a much more accurate output than using the 10kHz comparator that I have now.....but should I build the whole into a constant-temperature enclosure?

recursive loop: see recursive loop
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