[time-nuts] tcxo

Bob Camp kb8tq at n1k.org
Sun Dec 7 16:47:32 EST 2014

> On Dec 7, 2014, at 3:53 PM, folkert <folkert at vanheusden.com> wrote:
> Hi,
> I'm experimenting a bit with time keeping.
> For that I use cheap low power hardware like raspberry pies and
> arduinos.
> I noticed that the accuracy of a crystal makes a big difference. Did a
> bit of googling and I learned that a txco may help solve that.
> Something that keeps a constant temperature that is that I can then
> glue/solder to the crystal of those systems.
> My question now is: does anyone know of a simple schema for such a
> thing?

A TCXO “corrects” the (likely) third order temperature curve with some form of synthetic adjustment . The resultant cure is likely to be a 5th or higher order curve. It may well go peak to peak error over a (say) 10 C range. This makes temperature stabilization a gamble. You *might* stabilize it at a step part of the result curve. 

Much simpler to just shield the TCXO from drafts and fast changes ….


> I'm not entirely new to soldering but large schemas with lots of
> components are a bit daunting as I don't have the background knowledge
> to debug them if I soldered something wrong.
> Folkert van Heusden
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