Lapis

A 10 Hz pulse is nearly a contradiction in terms.

 

really? so you are saying that "an electromagnetic field that pulses at a frequency of 10 Hz" is a phrase that makes no sense?

it seems pretty straightforward and simple to me. But hey I could be wrong

I know of no evidence whatever that there is any biological effect from a static magnetic field or any reason to think that there might be.

 

actually, the effect of pulsed electromagnetic fields on the human body is quite astonishing. It's being used to treat everything from Parkinson's to ALS to schizophrenia to alcoholism

http://www.aetna.com...0_499/0469.html

http://scholar.google.com/scholar?q=Pulsed+electromagnetic+therapy&hl=en&as_sdt=0&as_vis=1&oi=scholart

information on its effect on plants However, is much harder to come by. That's one of the reasons I'm interested in studying it

Emf is also a commonly used acronym for "electromotive force," which is measured in volts. That's probably what TonyMcC was thinking of.

 

Could you not connect a signal generator to a small amplifier? You don't need terribly much power.

Okay then, electromotive force. emf for me has always met electromagnetic field, but I'm not familiar with all of the acronyms and whatnot.

Signal generator = function generator = frequency generator? same thing?

Yes, it seems that setup would work. But do I need a Specific amplifier to couple with a function generator?

also, what do you think the output of the amplifier should be in order to generate a one Gauss EMF with a simple copper coil?

Firstly, you measure emf in volts. I'm wondering if a tens machine would do the job. Its really to limit pain by blocking nerves with various patterns of voltage setting up currents in the nerves. http://en.wikipedia....rve_stimulation

actually, As I understand it, voltage is a measurement of the electrical potential of a wire with a current running through it.

Electromagnetic fields, Which are Created as a result of electric currents, are measured in terms of Tesla units and/or gauss units

a tens unit delivers a very weak electrical charge. That's not what I'm after.

I'm interested in how electromagnetic fields affect the growth of plants, not how electrical charges affect them

if anything I said Here is incorrect, somebody please correct me

I would like to set up an experiment in order to study the effect of pulsed emf's on plant growth.

So I want to build a device that emits a 10 Hz pulsed emf, at a strength of about 1-10 Gauss

Any suggestions on how to do this? the simpler the better, considering I'm reasonably intelligent Person On the one hand, on the other hand, I'm not the kind of person who likes to sit around constructing complex circuitry

thanks for any input

one way I thought of is to get a basic frequency generator and use that to get the 10 Hz frequency And rig up a simple copper coil to attach to the frequency generator. but the problem with that, the output amperage of frequency generators is very low. I would never be able to get Anything close to a EMF Of one gauss from it.

So perhaps I can amplify the output of a frequency generator…?

There are a good many drivers that operate effectively at this frequency. With the addition of a horn you could easily achieve a dB of >120dB @ ~100Watts. If you produce your own amplifier/oscillator circuit you should be able to do this for ~$100 less the cost of tools.

thank you

Great suggestions

If the method is ultrasound, then you don't want an EM source, you want an ultrasound source.

okay fine. do you know how I can generate 26 kHz via ultrasound without spending thousands of dollars?

I am interested in doing experiments using specific frequencies to destroy mold. According to my research 26 kHz will destroy n Aspergillus.

I would like to test this out. Question is how can I generate 26 kHz? What form of energy should I use? What kind of device should I use?

I was thinking of using radio frequency generating device. However most of those seem to start at 100 kilohertz and up. Maybe electromagnetic energy would be better? How would one go about generating an electromagnetic field that pulses at 26 kHz?

Any input is appreciated

http://iopscience.iop.org/0256-307X/15/2/014;jsessionid=AB6A60375E0A820121FB1BB4601EE076.c1

An ultrasound method of sterilizing aspergillus flavus and fusarium is proposed and demonstrated. The dependence of sterilizing effect on ultrasonic intensity, frequency, and treatment time is experimentally investigated. The density of surviving spores decreases first with increasing ultrasonic frequency and then increases with the further increase of the frequency, that is to say, there exists the optimum frequency 26 kHz at which the killing rate is near 100%. The killing rate seems proportional to the intensity and the time.