Poul-Henning Kamp wrote:
Sorry, I had read it as you had the OCXO in close contact with the box.
No, I agree that wouldn't work well. Isolating the oscillator from the cast box is what the teflon or nylon standoffs are for. As I said in response to Paul, I recommend at least 3-4 cm of air space on all 6 sides of the oscillator. If the cast box is mounted in another enclosure (whether the second enclosure has a thermostatically controlled fan or not), it should be insulated from that box, too (so, no direct thermally conducting path from the oscillator to the cast box, and no direct thermally conducting path from the cast box to any additional enclosure or rack).
Typically, the cast box can just sit in an out-of-the-way place on some rubber feet (preferably, not right in front of an HVAC vent). If the environment is brutal with respect to large, fast temperature changes, then an outer enclosure and perhaps even a thermostatically controlled fan are indicated.
This system has worked extremely well for me, and does not attract the same attention as requisitioning 4U rackspace for a cinderblock.
Best regards, Charles _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
