I used special order PVC Pipe with end caps, used the drilling mud to encase it
in the ground. The top cap had a U made up of PVC L's and was removable.
Initial tests where without any filling. Once convinced it worked I filled the
pipe with coin bags my local banker got me. Very strong canvas. Filled with
gravel and sand.and a numbered string attached. Used it from 74 till 93 when I
sold the home. Dug out 6 inches and filled it with dirt.Never detected any
moisture.Used a Tracor M100 modified to 60 KHz for comparison it served me in
Miami till 60 KHz was modified. Bert Kehren In a message dated 9/16/2020
1:16:24 AM Eastern Standard Time, [email protected] writes:
[email protected] said:> I later talked to a geologist who knows the Danish
underground well, and he> estimated I would have needed to drill to at least
25m depth to escape> seasonal temperature-changes and cited a research paper
from the 1950'ies> where the did precisely that experiment. I found a paper
showing skin depth at 1 year of 3-4 meters for soil, a bit over 1 meter for ice
and rock. Does a pipe in the ground stay dry? Or how do you keep in dry? In
summer, I'd expect it to be cool and if the humidity in the outside air is
above X% it would condense in the pipe. Do you just cover the top to avoid air
mixing? Does in need a desiccant? ... -- These are my opinions. I hate spam.
_______________________________________________time-nuts mailing list --
[email protected] unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.comand follow the
instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
