On 1/11/19 12:26 PM, Bob kb8tq wrote:
Hi
The most common approach to “monitor” a quartz movement is to listen to
it at 32,768 KHz with a tuned microphone. If it is an analog movement, then
one can detect the sound of the motor driving the mechanical side.
Do you need a device with a visual readout or are you after something that
gives you an electrical signal (like a PPS)?
Is DIY ok in this application? If so, there are a lot of TCXO’s out there that
will do at least as well as what you are looking for. A very different approach
would be a GPS (or WWVB) module with a battery attached to it.
I mis-spoke in my recent response.. 0.3 ppm is very challenging for a
TCXO in a wide temp range, but I just realized you're 0-35C.. that's not
that tough at all.
If a watch is “ok”, there are WWVB and GPS watches that will do much
better than 1 second accuracy for not very insane sort of prices.
Bob
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