Our Technical Advisor is not aware of any such Schumann Generator with a switch.
With our Geoclense Orgone Generator, if you have it plugged into a power board that has an on-off switch, then you would be able to regulate it this way, as our Geoclense Orgone Generator will change its frequency this way.
Perhaps this is what you may be thinking of? Here in Australia we have switches on our power point plugs, hence we can switch our electrical appliances off by simply hitting the switch, which you do not have in USA.
This may be the switch you are thinking of (see attached image).
For a futher explanation, please read out Blog titled "What Is The Hz Frequency Of Geocleanse Orgone Generators" http://www.orgoneenergy.org/blog/post/3467250
The resin block which is the Geoclense Orgone Generator is an ionic resin which changes the resonance of the electrical wiring, so that it resonates at healthy Negative Ion frequency. When current runs through the wiring, the EMF field them resonates at the healthy Negative Ion frequency.
It is medically proven that harmful Positive Ion causes a resonant effect on human organs and that helath Negative Ion balances the stress on the organs.
This is easily proven with bioresonance medical diagnostic equipment such as Biocom, Mora and Orion electrodermal.
Kinesiologist
Orgone Energy Australia
OrgoneEnergy.com
orgoneenergy.mobi