Lester J Hendershot Generator

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Matt Watts

Re: Lester J Hendershot Generator « Reply #125 on: 2015-02-01, 07:43:15 »

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I'm still very curious about these open-ended coil schematics I see from these fellows. At some point I'm going to do some experiments with this type of configuration. The first one will be with coax cable--one side on each end open, the other conductor connected. I'll wrap the coax around a core and try some various waveforms induced into it and see what it looks like on the scope. From the conventional viewpoint, I don't expect to see any current developed, but it would be nice to be wrong, then I'll need some help explaining it.

ion

Re: Lester J Hendershot Generator « Reply #126 on: 2019-04-12, 23:35:45 »

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It's turtles all the way down

Orthofield, you had some interesting points to make on the Hendershot Generator here:

http://jnaudin.free.fr/html/hender.htm

I wonder if you have thought about it anymore since that post back in 1997?

I built a unit back in the mid 1980,s but never was able to get it operational. More recently I learned that Hendershot used beeswax to fix the large inner capacitor to the "basket weave" coils. This led me to think there might be some form of acoustic coupling between the two, with the capacitor acting as an electrostatic ultrasonic transducer.

Although the serpentine coils have been later named basket weave, they don't bear much resemblance to actual basket weave coils of the early radio era where that type of construction was used to lower inter-winding capacitance. My guess is the Hendershot coils serve a different purpose acoustically, and may also explain the large capacitance values used in the device.

I have not seen any of the replicators pursue this line of research, not even have I dusted off the old unit to test this idea, but I might!

Regards

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"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy

Orthofield

Re: Lester J Hendershot Generator « Reply #127 on: 2019-04-13, 00:49:28 »

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Posts: 361

Hi Ion,

Wow, I haven't looked at that in a long time! I don't see too much that I would disagree with, except the assertion that all you need is a resonance and nonreciprocal linkage, and then you have OU. I doubt that to be true. It may be a requirement, but it's not sufficient. After that, the thing I'm less sure about would be the magnetic- ion interaction. I'm not so certain it would give enough C variation to get serious power. But maybe...

As far as thinking about it more, I didn't pay too much more attention to the Hendershot device after that, but went on the hunt for efficient, relatively low frequency, passive, nonreciprocal networks that maybe could be used in an OU device. I went more over to the Hall/Corbino side rather than the vibrating transducer side.

But looking through my papers on this stuff, I note that most of these transducers have a piezoelectric like terfenol, so it makes sense that sound is involved. I know of one magnetostrictive project with a nonreciprocal element that actually used beeswax (an excellent acoustic conductor.) Also, hey, maybe the clapper actually vibrated the 'basket weave' coil through the base, to add a little extra oomph :-)
I wonder just how easy it is to affect the C of an electrolytic capacitor? Taking one and measuring the C with or without a big fat magnet aligned with the axis would be a place to start.

I'll have to look at the coil again, because there are some cross coil configs with interesting properties (E parallel B EM waves at right angles to the intersection)-- but that's pretty exotic.
I just pulled up the 125 honeycomb coils in the patent database, will look to see if there is anything interesting there...

Fred

Orthofield

Re: Lester J Hendershot Generator « Reply #128 on: 2019-04-13, 03:01:57 »

Sr. Member

Posts: 361

Hi Ion,

Hmm, it doesn't make any sense to me now that he would use the basket weave coil to reduce parasitic capacitance, because with that big mass of dielectric nearby there would still be plenty of C. So why use a basket weave? So I went and looked.

De Forest, attached, shows the use of a Lecher line wrapped around a tube, as a highly Q transmission line stub. He discusses detecting both electromagnetic and electrostatic nodes on the wire, similar to the use of Lecher wire to measure wavelength.

With the dielectric nearby in Hendershot, you have a distinct slow line structure. With two such slow lines, you might be able to create some large delay effect, that, for instance delays CEMF from the clapper until it becomes a positive force to drive the clapper? Would need a big mass of dielectric, and a coil with a large cross section (=high L).

Pure speculation-- but resonance effects have been used in permanent magnet motors (which the clapper basically is) to apply CEMF to the next motor cycle. (patents by Goddard, Macdonald, Rupp, Subieta-Garron).
In this case, the Hendershot machine becomes a permanent magnet motor where CEMF does not impede motor action but supports it.

I note that the iron Cook Coils are long enough that there could be a substantial domain motion delay, with the secondary induction on one coil delayed enough to support the primary on the other coil (or something like that). Tesla also had transformers with a thin layer of metal between the windings to cause a delay, which could reach 90 degrees I think.

The patent from 1925 by Willy shows serpentine coils used as retardation coils, and also right angle coils intended to reduce mutual L and C. It's the only patent in this class besides De Forest that seems relevant. Retardation coils seem to be often discussed in these patents as a way to make voices clearer in radio reception. It was a time of extreme levels of experimentation in radio, with all sorts of weird antennas, including underground ones (Rogers) and miscellaneous even stranger things. In fact, I recall a patent (but can't remember who did it right now) for a 'radiant energy detector' that had a clapper or something like it.

These are more like free associations than research, but maybe there are some clues...There's also a patent class for coil/capacitor combinations, maybe there is something there...

Regards,
Fred

De Forest.pdf (497.4 kB - downloaded 981 times.)

Willy.pdf (429.99 kB - downloaded 957 times.)

thx1138	Re: Lester J Hendershot Generator « Reply #129 on: 2020-10-17, 02:33:17 »
Newbie Posts: 99	I'm just now getting back to my Hendershot build. Does it matter which direction the basket weave coils are wound? Should they be oppositely wound or wound in the same direction?

panyuming	Re: Lester J Hendershot Generator « Reply #130 on: 2026-02-03, 04:24:39 »
Newbie Posts: 44	https://youtu.be/f24OAlUKlUI

F6FLT	Re: Lester J Hendershot Generator « Reply #131 on: 2026-02-03, 19:32:38 »
Group: Professor Hero Member Posts: 2477	Quote from: panyuming on 2026-02-03, 04:24:39 https://youtu.be/f24OAlUKlUI Do you think the experiment is genuine? The lamp stays lit for a long time compared to the initial pulse that is supposed to trigger an oscillation. --------------------------- "Open your mind, but not like a trash bin"

Verpies	Re: Lester J Hendershot Generator « Reply #132 on: 2026-02-03, 19:59:34 »
Group: Administrator Hero Member Posts: 4535	Quote from: F6FLT on 2026-02-03, 19:32:38 Do you think the experiment is genuine? The lamp stays lit for a long time compared to the initial pulse that is supposed to trigger an oscillation. It is not often that an experiment is published despite that it does not work as intended.

F6FLT

Re: Lester J Hendershot Generator « Reply #133 on: 2026-02-06, 17:16:37 »

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Posts: 2477

When someone posts a link, it would be polite to explain why. Why are they bringing up this topic? Why should we click on the link? Is there something in particular that makes them think it's relevant and useful in our field?
Posting a YouTube link without any personal effort to analyze and summarize it for the community—I don't see the point. I could send 100 of those a day.

---------------------------

"Open your mind, but not like a trash bin"

Allcanadian

Re: Lester J Hendershot Generator « Reply #134 on: 2026-02-06, 18:38:43 »

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Quote from: panyuming on 2026-02-03, 04:24:39

https://youtu.be/f24OAlUKlUI

Interesting video and I often use comparative measurements. Some would spend hours on simulations or measuring things down to the last mV where I like comparisons to indicate the direction I am heading. Mainly because it's magnitudes faster and much more intuitive when doing experiments.

For example, we want to measure the basic efficiency of a DC-DC converter or joule thief. Rather than run a sim or measure input vs output current/voltage/power I just loop the output back to the input and see how long it runs. Now because the feedback is almost instant we can get a much better feel for what works and what doesn't. In fact, I stumbled onto many different new phenomena doing this.

Suppose we have a replication of the Hendershot Generator. Where is the energy flow in all this and how does the geometry relate to one another?. So I use a capacitor as the input and loop the output back to the input through an LED or light bulb. Now we have a visual indication of the run time. We could think of it as "pinging" the circuit and we send in a set pulse of energy to see what happens. So we hit a switch to charge the capacitor to X voltage in one pulse which pings the circuit and watch to see how long the light stays on, move a coil then ping the circuit, move a wire and try something else then ping the circuit. We don't need to measure anything exactly only find out what works better and a direction to proceed in.

Very important, always note what you changed in the circuit by writing it down if you get a better result. I like to stick a little piece of white electrical tape on things and number them so it's easier to make notes.

« Last Edit: 2026-02-06, 18:46:42 by Allcanadian »

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Comprehend and Copy Nature... Viktor Schauberger

“The first principle is that you must not fool yourself and you are the easiest person to fool.”― Richard P. Feynman

F6FLT	Re: Lester J Hendershot Generator « Reply #135 on: 2026-02-07, 12:01:39 »
Group: Professor Hero Member Posts: 2477	The video is of very little interest, since there are no measurements. Nothing to conclude. --------------------------- "Open your mind, but not like a trash bin"

panyuming

Re: Lester J Hendershot Generator « Reply #136 on: 2026-02-07, 21:28:42 »

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Posts: 44

Quote from: F6FLT on 2026-02-06, 17:16:37

When someone posts a link, it would be polite to explain why. Why are they bringing up this topic? Why should we click on the link? Is there something in particular that makes them think it's relevant and useful in our field?
Posting a YouTube link without any personal effort to analyze and summarize it for the community—I don't see the point. I could send 100 of those a day.

You are right. I'm sorry.

F6FLT	Re: Lester J Hendershot Generator « Reply #137 on: 2026-02-08, 09:34:01 »
Group: Professor Hero Member Posts: 2477	@panyuming Don't be sorry for such a small thing. I appreciate your contributions, which stick to the facts and rationality, the only way for us to succeed. « Last Edit: 2026-02-08, 09:35:06 by F6FLT » --------------------------- "Open your mind, but not like a trash bin"

panyuming

Re: Lester J Hendershot Generator « Reply #138 on: 2026-02-10, 03:41:25 »

Newbie

Posts: 44

Please allow me to say one thing at the beginning: I'm sorry.

On February 9, 2026, Pachuka released another video:
https://www.youtube.com/watch?v=lQCFfJIe_UE
https://www.youtube.com/@Pachuka/videos

In the video, it seems that a small incandescent bulb kept glowing continuously without any other input.

Of course, there are many similar videos. The devices shown in those videos might have hidden power lines; there might be concealed batteries; there could be airflow off-camera making the device in the frame keep spinning; or the naturally decelerating mechanical motion in the video could be played backward to show an automatic acceleration effect.
I used to believe what everyone said, that what was shown was real. Later, I watched it much less.

Because of the special nature of free energy, real videos are rarely released.
Even if a real video exists, it won't show others how to make it.
Perhaps the videos by Bedini, Kapanadze, Ton Smith, and others are genuinely OU devices, but since I couldn't replicate them successfully, I began to doubt the original videos. Eventually, I could no longer judge the authenticity of various videos.

In Pachuka's video, the output power doesn't matter; if it can indeed run on its own and keep a small incandescent bulb continuously lit, that's an effect I have been unable to achieve.
The video also shows different effects depending on the placement and angle of permanent magnets, which I have never seen before.
If I replicate the Hendershot device, even if I correctly replicate several coils and mutual inductors and adjust a few correct resonant frequencies, if I don't know how to change the angle of the magnets, I might still not achieve self-operation.
In my early years, I was able to successfully build a 9-inch TV because I had the hardware circuit diagrams, PCB layouts, and component specifications, as well as detailed adjustment steps for each part.
Ton Smith's device is very simple, yet I have never been able to replicate it successfully.

The following three videos from Pachuka show: an oscillating circuit powered by a transformer of about 5VA, which excites some incandescent bulbs over 100W, about 1/3 brightness, with at least 20W output. Then he pulls the power plug from the wall, stopping the input. The output continues to light the incandescent bulbs and lasts for several minutes. The clock in the video runs at 25 times speed.
https://www.youtube.com/watch?v=m0rvnvWQ6Dw
https://www.youtube.com/watch?v=TdSE9hQRjHI
https://www.youtube.com/watch?v=dL5BKGqBp9M

Kapanadze's early devices and Ton Smith's devices used sparks as excitation, which were rapid discharges.
Kapanadze's later devices had slow or very few driving sparks, which could be counted by ear. I find it incredible.
Pachuka's spark excitation also involved very few sparks.

Lester J Hendershot Generator

1770713106054.jpg (1889.3 kB, 1280x720 - viewed 53 times.)

« Last Edit: 2026-02-10, 08:54:26 by panyuming »