[time-nuts] An improved home for your Thunderbolt
holrum at hotmail.com
Wed Jun 10 19:40:07 EDT 2009
I did another test on my Thunderbolt isolation unit. I took my corrugated cardboard box (which measures 12x10x7" and covered it with aluminum foil. The Thunderbolt itself sits on a 1.5" thick piece of waffled foam rubber in the box.
The new housing is producing results very comparable to the fully insulated box, except the internal electronics temperature is 5 degrees C less:
RMS PPS error: 2.65 ns (over a two hour period)
RMS OSC error 0.026 ppb
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