Problem solved - That's exactly what a phase meter would have done for you.
John
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On 9/11/2022 6:11 PM, Jeff Green wrote:
OK don't laugh, ignorance calls for desperate measures.
I fed the output of the GPS DO and the output of the UTC oscillator each through a 1K variable resistor with to my R2000 general coverage receiver.
The two signals mixed and I think heterodyned. When I first applied power to the UTC the audio tone was maybe 100Hz, over an an hour the tone frequency dropped and became inaudible.
The S-meter slowly cycled from a maximum of +20 to too low to read.
I adjusted the trimmer resistor and the S-meter was cycling so slow I couldn't keep track of the seconds.
I suspect the UTC will do just fine without locking it to the GPS DO.
I don't need millihertz accuracy, yet.
My problem is my radio room window is shaded by trees, and I have to mount the antenna and GPS DO in the living room and run a USB cable to my radio room.
So I don't have easy GPS satellite visibility.
We have a bonded metal roof and I can't drill a hole in it without voided the 30 year warranty.
My wife is very supportive but draws the line at me running USB cables from one room, down the hall to my radio room.
I'm looking into running the USB cable in the wall up to the ceiling and across the attic to my radio room.
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John Kolb