In reply to MSF's message of Wed, 16 Jul 2025 23:10:26 +0000: Hi Michael, I was thinking along the lines of the cyclotron frequency of protons in the lower Van Allen belt. However strength of the Earth's magnetic field is a bit variable, and stronger at the poles than over the equator, hence latitude dependent, and the shape and thickness of the belt itself also somewhat variable. However a middle of the road frequency is on the order of 700-800 Hz, so anything around there might be interesting, and also a little easier perhaps, when it comes to components. I also wonder how you managed to determine the local direction of the Earth's field at your location?
> > > > > >Sent with Proton Mail secure email. > >On Tuesday, July 15th, 2025 at 12:16 PM, Robin ><[email protected]> wrote: > >> In reply to MSF's message of Tue, 15 Jul 2025 16:15:30 +0000: >> Hi Michael , >> >> >> Thank you. :) BTW did you try a range of frequencies? > >No, I had such a tiny current from the "Shuman" frequency, that I wasn't sure >if it wasn't a measurement artifact. I used electrolytic capacitors on account >of the extremely low frequency because I didn't want make a huge coil. Given >the leaky nature of that type of capacitor, it would be hard to be sure of the >results. I tried to figure out some sort of phase-lock loop on account of the >variations in "Shuman", but that's way out of my wheelhouse. I'll bet William >Beaty could figure it out. > >I just thought that while I was at it, I could "steal" some 60hz grid juice. >Using an open solenoid, you can fine tune the frequency by moving an iron rod >in and out. It worked pretty well. > >Regards, > >MSF Regards, Robin van Spandonk If you work from home, consider living out in the country, where houses can cost half the price or less than those in the city.
