[time-nuts] OCXO Vectron 218Y44442

Kevin Doherty neg.number at gmail.com
Mon Oct 16 23:51:12 UTC 2017

Oscillators need a little noise to start up.  Usually there's plenty in 
almost any circuit, but if you're running cold, or voltage is a little 
low, you might not have enough to start.

The mechanical impulse adds noise (crystal = piezoelectric) to the 
feedback loop; apparently enough to get it started.

Might be that your power supply is running a bit low, and you don't have 
*quite* enough gain to start.

On 10/16/2017 4:10 PM, Vlad wrote:
> Hello,
> I am wandering if anybody observe the behavior for OCXO, when its stop 
> to reproduce the signal, and the only way to return it back to business 
> is little mechanical stress.
> I have TWO of such OCXO. One of them is Austron 11.2 Mhz. And another 
> one is Vectron model 218Y4442 9.8304Mhz
> In case with Vectron, I even disassemble it (to whom who brave here is a 
> pictures):
> http://www.patoka.ca/Vectron-218Y44442/
> Then as I connect it to the PS, I realize it start to reproduce the 
> signal again ! Before this it was nothing ! I tried different PS before 
> to open this "can" as a last resort.
> For the Austron - I didn't disassemble it. Instead I just kick it a 
> little bit. And immediately after that, it start to produce the signal !

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