Bert wrote:
As I said before am waiting for the small spheres and will see what happens.
Monitor carefully, as I suspect the spheres will pack too tightly leaving too little airspace. You could easily burn down an OCXO if this proves to be the case and the oven control loop goes unstable. I'd put a thermal sensor on the OCXO itself for testing.
Even if it doesn't burn down, you could find that the oven performance is degraded by (i) instability or quasi-instability of the oven controller, or (ii) too much thermal resistance (remember, you want to add as little thermal resistance as possible).
On the other hand, mounting the OCXO as centrally as possible inside the outer enclosure on thermally non-conducting standoffs (teflon or nylon), with at least an inch of air on all six sides, has proven to work extremely well.
When I described using packing peanuts (or similar) to break up the airflow, it was in the context of having already mounted the OCXO as centrally as possible inside the outer enclosure on thermally non-conducting standoffs with at least an inch of air on all six sides. And as I said, I have not found the additional step necessary once you have done this. It may even be counterproductive.
Best regards, Charles _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
