# H-Cat Resonance Puzzle

Here’s a video that I found interesting and thought I’d put it up here to see if anyone has any ideas about what might be going on. Thanks to David for sharing this. The video is from an H-Cat experimenter named Peter Bannister, who discovered in the course of putting together a h-cat system in which catalysts are placed in a metal pipe, that a strong resonance effect is found after the catalysts reach a certain temperature.

The effect was discovered completely by accident, and interestingly, the effect continues for five minutes or so after he turns off gas flow to his system. I was thinking that maybe the gas flow into the metal pipe was creating an organ pipe-like effect, but the effect seems to be coming from the catalyst itself.

The video is quite long — it begins with a demonstration of the resonance effect, then Peter backtracks and takes us through the details of the setup, and shows the steps he took to get the resonance. I thought this would be a nice brain-teaser for ECW readers!

• Sanjeev

If you wind a coil at the top and place magnets around it, you will get electricity !
Instant heat to electricity conversion with spare heat….it can be used, whatever it is.

• dickyaesta

Found this pdf link interesting in explaining and visualizing the Rijke Tube as Thermoacoustic Energy Converter: http://ecs.utdallas.edu/news-events/events/deanspong/documents/Experiments%20with%20Rijke%20Tubes-%20Investigating%20Thermoacoustic%20Dynamics%20and%20Control.pdf

• nickec

I wonder what a wire coil wrapped around the system might show? Such a coil might detect moving charge. This is, of course, pure conjecture.

• Ophelia Rump

It is actually a standing wave front which oscillates at high frequency, if I am not mistaken.
Now if that standing wave occured in a suspension of magnetic particles you could very well design a generator like that. Straight from heat to electric, I believe there is a Danish or Swedish company that makes them for geothermal to electric conversion.

I believe they just oscillate a large magnet, like a piston.

• GreenWin

Clearly ALL scientists are not ignorant – or corrupt. But many scientists behave like sheeple, towing the orthodox barge. This is due to career concerns and funding. When we return to independent research & funding, and round up the corrupt responsible for debacles like hot fusion, suppression of CF, and AGW – public respect for mainstream science may climb above ten percent again!

• ecatworld

Hi, I didn’t change anything in it — I approved it as it was submitted.

• Ophelia Rump

Congratulations you have discovered the Rijke Tube, heat engine.
This is an amazing heat engine, like the Stirling engine from a single sealed tube with some heated material in one end and a piston at the other, the piston is the only moving part.

http://en.wikipedia.org/wiki/Rijke_tube

• georgehants

Vio Phile, do you have a problem with anything I have commented above.
I don’t think your ranting is going to help clear up the many problems with science and scientists.
Just to correct you, I above put “many” scientists and not “all” as you mistakenly did.

• Obvious

Gets popcorn…

• georgehants

There always seems to be a scramble by scientists to explain away an effect.
This is very bad practice that has led to the fiasco of Cold Fusion and many other subjects in science.
Giving “opinions” on possibilities is fine, but it must go along with advice to continue competent and open-minded Research to be sure that something important is not missed.
The times of ridiculous “expert opinion” in science, hopefully are ending and the more responsible and professional methods of investigation and Research are to be now used and taught to our students.

• Alan Smith

This is another version of the ‘singing flame’ -well known to anyone who regularly played with old-style Bunsen burners. No magic involved, This article from 1874 explains the phenomenon.

• Gerard McEk

Something inside the tube starts to vibrate, probably the catalytic
material. Could take out one of them to see if the vibration still
continues. My guess is that water vapour is formed between the two
peace’s and released frequently in a radial direction, lifting the upper
one short and slightly. It seems that the resonance-frequency of the
pipe is sort of the same as the vibration of the catalytic material, and
so enhancing the sound, or that the sound of the standing wave in the
pipe determines the vibration frequency of the material. I think the
latter is the case.

• Andreas Moraitis

Thanks, that looks much better. Then, perhaps the air inside the metal tube would be the source of the sound. One could easily verify this by using tubes of different lengths. A shorter tube should give a higher tone, whereas a longer tube should produce a deeper tone. The same as with organ pipes.

• Andreas Moraitis

@disqus_u13Tu1NDEO:disqus (by some reason I can’t reply directly)

Sorry, I don’t agree. Thermoacoustic heat engines create the sound
artificially (with a loudspeaker, for instance), as is described in the
article you have pointed to.

• Rabbitduck

The sound originating is thermoacoustic phenomenon.
http://en.wikipedia.org/wiki/Thermoacoustic_heat_engine

• Dave

Heated tubes will Resonate.

• artefact

maybe that is Focardis hammer.

the contraction of the metal pushes the H and or D into the lattice.

The e-cats have input for the heating element and input for “frequencies”.
The frequency could be adjusted to have the peak when the contraction occurs.

• Andreas Moraitis

That’s roughly a 220 Hz sine wave. It could be a harmonic of the utility frequency. Was that experiment done in Europe or in the USA? European countries use a utility frequency of about 50 Hz, the USA 60 Hz. In the present case, ca. 55 Hz (1/4 of 220) would fit. Since the pitch is pretty constant, I wouldn’t expect that the effect is related to pressure.

• Andreas Moraitis

I just read that the sound appears to come from the catalyzer. That’s indeed strange. I would like to know the utility frequency anyway.

• http://www.lenrnews.eu/lenr-summary-for-policy-makers/ AlainCo

note that graham hubler told in a synthetic slides that among the trigger of LENr there is ultrasounds…

https://mospace.umsystem.edu/xmlui/bitstream/handle/10355/37370/SidneyKimmelInstituteOverviewPresentation.pdf?sequence=1

• BroKeeper

If these are multiple ultrasounds (beyond hearing range) at near frequencies could result with lower consonant and dissonant beats within our hearing range.