HHO. 20 Using a VNA to find the cell resonance скачать в хорошем качестве

HHO. 20 Using a VNA to find the cell resonance

Update 12th March 2013 I now think I'm wrong about folk not being able to hit resonance see HHO. 22 or HHO. 23 back to this video... In this video I use a miniVNA (vector network analyser) to investigate the resonant frequency of the HHO test cell. In order to do this I connected a small inductor in parallel with the plates of the cell. I started off with the same coil that I used in the last video when I used the oscilloscope and signal generator to find resonance, remember that I had the coil one metre away from the plates on the end of the coax feed cable in that test. In this test I found that in order to achieve anything like a significant dip with the VNA I had to use quite a small coil. If I use a larger coil there are two drawbacks, first the frequency is below the 1 Mhz bottom end of the range of the VNA but more significantly, with a larger coil the dip at resonance is very very small, in fact it gets lost in the noise. When I was looking for resonance with the oscilloscope and signal generator I found that it was impossible to find resonance of the cell when it was wet, so I found the resonance of a dry cell and then slowly introduced the plates into the water and 'tracked' the resonance as it changed frequency. Water increases the capacitance of the cell but the resistance reduces as the cell is immersed into the tank. With the 2 off 100mm x 100mm 316L stainless steel plates with a 1mm gap in water from my dehumidifier this resistance is enough almost totally damp the Q. By the way I take it for granted that you appreciate that once you know the resonant frequency of the wet cell that it's simply a case of measuring the inductance to calculate the capacitance. (you can't measure the capacitance of a wet cell reliably) I think the idea of finding and tracking resonance of a damped cell is unlikely, I think that any special effects that may be achieved in the disassociation of molecules is likely to have more to do with dv/dt than actually hitting resonance, that is having a fast rise time to any applied DC signal. That's what I'll be looking at next. I'd like to hear from anyone who can contradict my comments about predictably hitting resonance, with proof or convincing discussion, no juju beads and chicken feathers please. Thanks for the interest and the input. Kind Regards...Andy GWØJXM Link to HHO. 1 Successful test using a copper & stainless steel cell    • HHO.1 Successful tests using a copper & st...   Link to HHO. 2 Construction of a test cell.    • HHO. 2 Construction of a test cell.   Link to HHO. 3 Some mods to the cell and higher than anticipated capacitance reading.    • HHO. 3 Some mods to the cell and higher th...   Link to HHO. 4 building a resettable gas flow monitor.    • HHO. 4 building a resettable gas flow moni...   Link to HHO. 5 Test set up for results for dehumidifier water.    • HHO. 5 Test setup, the results are in HHO.6   Link to HHO. 6 Results for the test setup in HHO. 5    • HHO. 6 (Re-edited video) Test results for ...   Link to HHO. 7 Graphs, same data as in HHO.6 but presented differently    • HHO. 7 Graphs, same data as in HHO.6 but p...   Link to HHO. 8 Test cell efficiency graph 5 to 30 volts DC    • HHO. 8 Test cell efficiency graph, 5 to 30...   Link to HHO. 9 3 to 5 volts graphs plus 3 to 30 Volts    • Link to HHO. 9.   3 to 5 volts graphs plus...   HHO. 10 No data, just me waffling on about matters arising    • HHO. 10   No data, just me waffling on abo...   HHO. 11 Cell resistance vs temperature ~ 0.49 Ω per °C    • HHO. 11 Cell resistance vs temperature ~ 0...   HHO. 12 Cell resistance vs DC Voltage (2.5 to 30 Volts)    • HHO. 12 Cell resistance vs DC Voltage (2.5...   HHO. 13 Cell resistance vs DC voltage (1.5 to 6 volts)    • HHO. 13 Cell resistance vs DC voltage (1.5...   HHO. 14 Comparing the cell to a capacitor and a battery    • HHO. 14 Comparing the cell to a capacitor ...   HHO. 15 Test to eliminate issues with dissimilar metals    • HHO. 15 Test to eliminate issues with diss...   HHO. 16 Test to eliminate possibly issues with the power supply    • HHO. 16 Test to eliminate possibly issues ...   HHO. 17 Graphs for different plate spacing's, 1 to 5mm    • HHO. 17 Graphs for different plate spacing...   HHO. 18 Just me waffling on about where I'm going with this project    • HHO. 18 Just me waffling on about where I'...   HHO. 19 Finding the cells resonant frequency    • HHO. 19   HHO. 20 Using a VNA to find the cell resonance    • HHO. 20 Using a VNA to find the cell reson...