There is a small, about 3.5" by 4.5", GPSDO board being offered by several sellers on eBay. I bought one from what looks to be the only US based source. It is identified as True Position, Inc., and had a small CTS OCXO and Furuno GT8031 on board. I found hook up information in one of the Asian vendor's ads. When it arrived, I hooked it up and waited for it to achieve GPS lock. I left it over night, but it never locked. This morning, I sent a message to the seller requesting to return it. I looked around on eBay to see what the going price was and discovered that the US source was about 1/3rd the price of the Asian vendors. I also noticed in one listing where the seller mentioned that it will not discipline the 10 MHz unless you entered a command by RS232. If you buy one, he will tell you what the secret command is. Does anyone, perchance happen to know the secret command? And, would you be willing to share? This isn't a bad looking little board. I was thinking of pulling the little CTS oscillator and replacing it with something better. The fact that you have to tell it to do its thing is something of a bummer, but I think I can live with it.
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