Schumann Resonance Frequency Generators - Page 1
Forum section: electronics / general

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 06, 2025, 09:16:07 pm
content: I know this is a funny topic, but I don't care if the claims about Schumann's Resonance Frequency are legit or not. There are scientific studies, including listed in NIH (for example:https://pmc.ncbi.nlm.nih.gov/articles/PMC2656447/) that imply there is something to SR. Whatever.There are a ton of devices that claim they can broadcast these frequencies, some stating up to a 250 foot radius (among other claims). I want to test some of these machines to see what they actually produce (if anything). There's a broad range of cost for this stuff. From $6 eBay/Ali specials to "TheSchumann V2" on sale for a humble $229.TheSchumann.com website has a shady Apple marketing vibe to me. It looks like they took a $6 generator and put it in a $20 case, and sell it for $229. I could be wrong; maybe it's the best single sig gen ever made for under $500. 🤷Some of those devices have test points for oscilloscopes to confirm the frequency/waveform. 🙄 Cool. They made a generator that can send a signal to a test point. Amazing. Does it go anywhere past that?What signal (if any) is being broadcast, and what distance does it actually cover (if any)?Some of these devices claim the ability to output different waveforms, and some of them always refer to them as pulses.What's the best way to test these devices? My SA doesn't go below 9kHz, and I haven't seen an EMF meter that goes below 30Hz...and for some reason, they mention ghost hunting more often than not. 🤣🤣I'm not going to spend a ton of money on a real EMF probe. Should I go the DIY way? Any suggestions on how I can test these things?Thanks,Josh

author: temperance
author_rank: Super Contributor
timestamp: June 06, 2025, 09:52:28 pm
content: TheSchumann V2.Look at that. In order to operate down to 0.1 Hz, the front panel is a 2997925 km /10e12 (or maybe 10e16) wavelength antenna.I think you have a siglent scope with an aluminum handle on it?

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 06, 2025, 09:55:46 pm
content: Quote from: temperance on June 06, 2025, 09:52:28 pmIndeed. So how do I put that sweet aluminum handle to use?

author: temperance
author_rank: Super Contributor
timestamp: June 06, 2025, 11:07:31 pm
content: There is a VLF antenna available on Antarctica onto which you can connect SDS2 K FFT analyzer.https://nl.wikipedia.org/wiki/Very_low_frequencyI have no idea when the tickets to such locations are on sale.I don't know of any antennas readily available for ULF and ELF reception.Edit:QuoteWith a suitable 1/4 wave antenna spanning the globe a few times attached to it it might work.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 06, 2025, 11:29:14 pm
content: Your suggestion is almost as realistic as these device claims. 🤣

author: temperance
author_rank: Super Contributor
timestamp: June 07, 2025, 12:25:00 am
content: We have some RF specialists available here who might come up with better ideas.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 07, 2025, 12:53:20 am
content: To be fair, a quarter wave antenna for 8Hz should only be like 40 kilometers. That could fit in your pocket, right?

author: fourfathom
author_rank: Super Contributor
timestamp: June 07, 2025, 01:30:53 am
content: Quote from: KungFuJosh on June 07, 2025, 12:53:20 amThat 8 Hz quarter-wave would be about 9,375 kilometers. Not counting any counterpoise.

author: coppercone2
author_rank: Super Contributor
timestamp: June 07, 2025, 08:26:21 am
content: Read thishttps://www.navy-radio.com/commsta-elf.htmSpecifically read the PDF's in the front like this onehttps://www.navy-radio.com/commsta/elf/ELF-8112-ADA109555.pdfthis is a map of a state showing you maybe 1/20th of what you wantHow to test it = put a big inductor nearby connected to a high impedance amplifier and figure out how to filter the crap out of itIf you read all the plans the initial / backup plan / 'whacked out on speed' plan for this communication was for the navy to have a fleet of like fake delivery vans which would drive out across the country to try to isolate and hijack massive portions of the power grid to turn into a emergency ELF transmitter or something like that.You know the common magnetic loop receiver antenna? It never stops working really. You can keep increasing the inductor.All these devices can do is have a electromagnet that has a 7Hz sine wave plugged into it. They can't do a 'antenna'.

author: coppercone2
author_rank: Super Contributor
timestamp: June 07, 2025, 08:40:28 am
content: https://en.wikipedia.org/wiki/Chu%E2%80%93Harrington_limitthis is what it does if you put a magnet on a dremelhttps://usncursi.org/archive/aps-ursi/2017/papers/2624.pdfbut its not a substitute"We first solvethe retarded potential generated by the time-varying electric current and then calculate the electricalfield and magnetic field using the retarded potential. According to the numerical analysis, we find thatmost of the electromagnetic energy of the RMBMA is not really radiated, but it is statically storedin the field surrounding the antenna, as a static field of a permanent magnet, it will not be reflectedon the interface between the two different media. An RMBMA can be used to communicate with areceiving loop antenna by magnetic induction, which can create constant channel conditions when thepropagation media are air, water and most kinds of soil, since the magnetic permeabilities of thesemedia are similar [10, 11]. So the ELF-ULF band RMBMA is applicable to underwater communication,underground communication and communication in mixed media of air, soil and water in the near field."vhttps://www.jpier.org/ac_api/download.php?id=18070204I am not sure on why exactly, but even with a magnet, even if its strong, you need it to be large to 'radiate' like a big antenna would./ Some how its the same problemIIRC the amount of 'current' that a large spinning magnet puts out compared to a similarly sized antenna would be in the thousands of amps. So they do have merits, but it all seems limited to maybe 300 Meters for big ass super alloy magnets

author: temperance
author_rank: Super Contributor
timestamp: June 07, 2025, 10:52:37 am
content: QuoteThe smart watch looking device claims 0.1 Hz or a wavelength of 2997924580 m.

author: 5U4GB
author_rank: Super Contributor
timestamp: June 07, 2025, 10:58:22 am
content: Quote from: fourfathom on June 07, 2025, 01:30:53 amSo it would work perfectly in Russia, just connect it to one end of the trans-Siberian railway and you've got your quarter-wave.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 07, 2025, 02:10:00 pm
content: I get that the claims the sellers of these devices make are dubious at best. It doesn't matter. These things seem to be puttingsomethingout, and I want to see what that something is.Maybe it's a placebo effect, but a lot of people claim they sleep better with these devices nearby. Placebo effect is powerful, but is it the only thing happening here?I'll probe with a scope directly to see what frequencies are on the device, then I'll use a floating probe, then an antenna on an SA to see if anything above 9k is being transmitted. It seems more likely that if something is being transmitted, it's at a higher frequency than claimed.Maybe something like this would be fun:https://electronics-diy.com/simple-emf-probe.php

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 16, 2025, 11:36:23 pm
content: I bought a few different versions of these. One I probably can't open without breaking, but I'm sure it's the same as the others.They all work essentially the same way. They're pushing a 1Vrms signal to their cute spiral antennas. The frequencies going to that magic antennacanbe what they claim.Here's the first one. It has a shitty DDS signal generator module connected to it. Not a clean signal at all. There is a signal as set, but it's never alone. The 2kHz images were 1kHz signals. The 7.83Hz signal was there, but bounced around plenty from low Hertz to kHz ranges.After getting to their magic antennas, they're not likely going anywhere from there. I'll try and see if there's any super magic fancy waves floating around besides stray 60Hz AC. I won't hold my breath.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 16, 2025, 11:37:58 pm
content: And here's BS unit 2. This one is cuter, and can be adjusted with a small trimmer screw on the board. Before adjustment, the square wave was 8.18Hz, but I was able to adjust it to the magical 7.83Hz.

author: 5U4GB
author_rank: Super Contributor
timestamp: June 17, 2025, 05:03:13 am
content: I saw what you did there.For the second one, I have to say everything's nicely laid out and labelled even if it is woo-woo.