Guest guest Posted December 22, 2004 Report Share Posted December 22, 2004 Nice little test, it illustrates well the odd harmonic content of 50% duty cycle square waves. Now if your software allows you to run a test with a variable duty cycle square wave (called rectangular waves), you will start to see even AND odd harmonics on your spectrum analysis of the rectangular waves. Robin > Greetings! > > With regard to some discussions on sawtooth and square wave harmonics, I ran > a small test with the new sound card engine I am developing for Frex. > > http://www.heal-me.com.au/cambrone/waveform_harmonics.htm > The above URL displays charts of the harmonic response of different wave > forms that were generated on a computer sound card at 500Hz. The page does > have some graphics and could be slow loading on some connections. > > White noise looks good :-) > > Regards > Ken > http://www.heal-me.com.au Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 22, 2004 Report Share Posted December 22, 2004 Hi Ken, Nice bit of work there. Could you now try this; Using the same frequency, wave forms and plots here as a baseline, pass this same information through a discharge tube, no RF, just the audio. You may need to go through some amplification to get the signal driving the gas in that tube to plasma, but once you do, ratio the output levels. You could expect a larger range of harmonics, as the gas is going to be a non-linear media. Depending on the distance between electrodes, this will determine the ignite voltage, then a lower voltage will sustain the discharge, use series resistors to limit the current load on your amplifier(s). You may need direct coupled (no transformers) amplifier to maintain the non-sine waveforms from rounding off in the inductance of transformers. This before and after experiment I would like to see. As a guide to what voltage range to use Vs size of tube, I start or ignite a tube with 6 feet distance between electrodes with 1100 volts, then depending on the current I wish to drive through it, a voltage of ~185 will maintain a 4.25 amp discharge (22.5 inches wide). Pressure range .1 to 10 Torr. A pressure range of ~.3 Torr is a sweet spot for starting discharges with air mix. 10 Torr gas filled tube and enough voltage will run this test fine. If you can borrow the tube, most high power audio amps are direct coupled these days. Just remember use resistor to stop run away of current. For a small gas filled tube, you should easily scale back the ignite and maintain voltages;You could also ignite it with RF and suitable RF Choke blocking away from the audio stage, then keep it going with just the audio signal. We know what this will look like on a RF modulated system, what your experiment would do is show the wave forms and harmonic distribution without all the information clutter of the RF modulated typical tube. Regards, Mike Waveform Harmonics Greetings! With regard to some discussions on sawtooth and square wave harmonics, I ran a small test with the new sound card engine I am developing for Frex. http://www.heal-me.com.au/cambrone/waveform_harmonics.htm The above URL displays charts of the harmonic response of different wave forms that were generated on a computer sound card at 500Hz. The page does have some graphics and could be slow loading on some connections. White noise looks good :-) Regards Ken http://www.heal-me.com.au Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 22, 2004 Report Share Posted December 22, 2004 Hi , I'd haven't yet created a duty function. I guess I can modulate and phase two signals to generate it. The library I am using doesn't come with duty cycle built in. Same with gateing. It does have a multi channel mixer, so I hope figuring it out wont be too difficult. Regards Ken U. Re: Waveform Harmonics > > > Nice little test, it illustrates well the odd harmonic content of 50% > duty cycle square waves. Now if your software allows you to run a test > with a variable duty cycle square wave (called rectangular waves), you > will start to see even AND odd harmonics on your spectrum analysis of > the rectangular waves. > > Robin > > > > Greetings! > > > > With regard to some discussions on sawtooth and square wave > harmonics, I ran > > a small test with the new sound card engine I am developing for Frex. > > > > http://www.heal-me.com.au/cambrone/waveform_harmonics.htm > > The above URL displays charts of the harmonic response of different wave > > forms that were generated on a computer sound card at 500Hz. The > page does > > have some graphics and could be slow loading on some connections. > > > > White noise looks good :-) > > > > Regards > > Ken > > http://www.heal-me.com.au Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 22, 2004 Report Share Posted December 22, 2004 With respect to harmonics, the clinical result is what you are after. For certain organisms like candida, if you do not generate all harmonics you will not completely eliminate the organism. A square wave with 10% duty cycle works best. For most organisms a 50% duty cycle works better. I haven't seen a lot of benefit by varying the duty cycle otherwise. For most rapid treatment time, scalar harmonics work best. They will cut treatment time by at least a factor of two. This means you divide the primary frequency by e to the third, sixth, or ninth powers for higher frequencies. Multiply by the same factors for lower frequencies. Of course, as Rife himself pointed out, if you don't have the right frequency, nothing with help much. Jeff Sutherland Date: Wed, 22 Dec 2004 14:45:20 +1100 Subject: Waveform Harmonics Greetings! With regard to some discussions on sawtooth and square wave harmonics, I ran a small test with the new sound card engine I am developing for Frex. http://www.heal-me.com.au/cambrone/waveform_harmonics.htm The above URL displays charts of the harmonic response of different wave forms that were generated on a computer sound card at 500Hz. The page does have some graphics and could be slow loading on some connections. White noise looks good :-) Regards Ken Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 22, 2004 Report Share Posted December 22, 2004 Just as we do have a comprehensive list of CAFL....Do we have a similar list of recommendations as to what duty cycle is good for what condition and so on...I am sure we have many wonderful researchers out there who can be a source of great knowledge and assistance...Do we have such a list? and if not can this initiative be taken up by one or a group of our researchers.....I am sure all Rife users will appreciate this. Thanks Reza Jeff Sutherland wrote: With respect to harmonics, the clinical result is what you are after. For certain organisms like candida, if you do not generate all harmonics you will not completely eliminate the organism. A square wave with 10% duty cycle works best. For most organisms a 50% duty cycle works better. I haven't seen a lot of benefit by varying the duty cycle otherwise. For most rapid treatment time, scalar harmonics work best. They will cut treatment time by at least a factor of two. This means you divide the primary frequency by e to the third, sixth, or ninth powers for higher frequencies. Multiply by the same factors for lower frequencies. Of course, as Rife himself pointed out, if you don't have the right frequency, nothing with help much. Jeff Sutherland Date: Wed, 22 Dec 2004 14:45:20 +1100 Subject: Waveform Harmonics Greetings! With regard to some discussions on sawtooth and square wave harmonics, I ran a small test with the new sound card engine I am developing for Frex. http://www.heal-me.com.au/cambrone/waveform_harmonics.htm The above URL displays charts of the harmonic response of different wave forms that were generated on a computer sound card at 500Hz. The page does have some graphics and could be slow loading on some connections. White noise looks good :-) Regards Ken Quote Link to comment Share on other sites More sharing options...
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