[time-nuts] Portable Time Standard

[jimlux]

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
>