OK - there is some confusion here.
The only complex LRL you can practically build yourself is the type similar to the Ranger-Tell Examiner. See this link:
http://www.thunting.com/cgi-bin/geot...iner/index.dat
There is some dispute over the operation of these devices, so it make sense to build one yourself before parting with a lot of money. Description one in my last post is an attempt to explain the underlying principles behind this type of device. The construction is very simple, as can be seen from Carl's report in the above link.
The second design is extremely complicated and not suitable for home construction. Anyway, it's still under development. The Sample Chamber Amplifier Module (SCAM) is the most tricky part of the design to construct and calibrate. The Ionic-Electrostatic Phenonemon Biotronic System is an advancement on the standard ionic versions and the theory is still under intense study. The I.E.P. - B.S. system achieves very close coupling between the operator and the natural Schumann resonances of the earth. This is because the Biotronic-System (B.S.) calibrates not only the target sample, but also the operator, bringing the biological and electronic systems into alignment.
If you do build the Ranger-Tell Examiner lookalike, then please let us all know the results.