I am considering a below ground "clock room" away from the house. This
will be for some low-drift quartz oscillators and also a couple of
precision pendulum clocks. The goal is long-term, unattended, and very
undisturbed operation.
For scale, assume the room is 1 meter × 1 meter × 2 meters deep. So
that's vastly smaller than digging a basement, but much larger than
drilling a 8 inch round pipe. Digging down gives some natural isolation
and temperature regulation. A couple tons of concrete gives high
stability vertical walls for the pendulum clocks.
If any of you have personal or professional experience with the design
or construction of this sort of thing, especially experience with
precast (utility) vaults or poured concrete, please let me know.
In case this gets too off-topic for time-nuts, off-list email to me is
fine (t...@leapsecond.com).
Thanks,
/tvb
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