Ionizationx: a clean environment is a human right!
Projects by members => Projects by members => Electrotek => Topic started by: tektrical on March 13, 2020, 01:59:50 am
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I've been looking at a patent for a simplistic high frequency pulse generator (US3798461A). It's basically two disks spaced apart with a spark gap in the middle. There's brass tubes in alignment, running out from the disks, with coax threaded through the tubes. Each disk is connected to its own external capacitor, and when these caps discharge through the spark gap, the apparatus produces one pulse for each two sets of brass tubes, with the frequency determined by the length of the coax. The number of desired pulses determines the number of tubes.
The patent says there is advantage to not stripping the coax, which indicates to me that the shield can be used for the central capacitive conductor, rather than the coax's inner wire. This would provide a larger diameter, higher capacitance inner conductor than just running a normal wire through snug fitting tubes.
The patent also says an asymmetric output can be produced by replacing the lower tubes and coax with resistors joining the central conductors coming down from the top. So the pulse output could be strictly positive or negative. Then the length of the coax would be half of the output wavelength. (It seems to me.)
With a lower supply voltage, the spark gap can be replaced with a diactor, or TVS diode.
For microwave frequencies, the device would be fairly small. But water's specific dielectric resonant frequency can be produced.
And there will be a slight pause between the pulse strings, as the supply caps recharge. This pause will be shorter with smaller, faster charging caps.
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Interesting....
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Thanks, Steve. I appreciate your interest. And I am planning to play around with this, since it relates to more than one thing I'm working on.
The easiest way to get the discs is to use a safety can opener which slices off part of the rim when I open various sizes of canned goods. And I just verified that electrical soldering flux also works on steel, to solder the tubes.
If I decide to do just some positive pulses, I may use the coax's shield itself for the tubes. With, say, 10 holes in the can lid, I could bend some short pieces of coax into the upper part of a sine wave, solder the shield around the holes, and leave a little of the center conductor sticking down through the holes. Then, short lengths of nichrome wire (from a hand held hair dryer) might work as the resisters, to tie the bottom circuit together. The part of the coax which has the bend will have to be stripped, leaving the inner wire bare.
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never opened a hair dryer. I have an old HV unit which has what I assumed was a resistor arrangement, which by memory broke which is why I haven't pulled it out for years. might go check that.
from my years of reading , 1/4 wave length has always stuck with me because of zero to peak. just referring to what you mentioned 1/2 wavelength
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As I understand it, each tube produces a 1/4 of each pulse wavelength. The potential goes up through one tube, then down through the adjacent tube before reversing polarity. A single tube version could be great for some applications. (This was the original inspiration for Ed Gray's Conversion Tube). From a relative perspective, a unit whose wire is a quarter longer than the length of a coil's wire will produce a rotating magnetic field when the signal is applied to the coil. Ideally, the coil could have four or five turns. But a single turn coil will also work. Or several turns, if you want a stronger field and don't mind the wire length and/or want to keep the frequency lower.
Another good place to get resistive wire is from the heating elements in a toaster oven.
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I know you never post pictures, but maybe in this case? This device will be the first on the internet, i tell you.. :)
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I know you never post pictures, but maybe in this case? This device will be the first on the internet, i tell you.. :)
I do believe that pictures add an extra dimension to a presentation. I've actually posted a ton of images to this site, and I intend to include some in this thread, once we get a little sunshine out here. The way it's been lately, I can barely charge the computer enough to play a few games of Freecell per day. That game is addictive and I'm rated as a Freecell Grand Master, based strictly on the number of games, rather than my skill level. Still, there are very few puzzles I have difficulty working my way through, and I recognize them at a glance when they first load.
Maybe in a day or two.
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hi all what about a good pulse generator with 60Ghz yes 5G tech and it will make a gun obsolete do you like that the now have made it possible for any one to do just that
just use the off the shelf equipment now available to make nice pulse weapons is any one interested ?
it is a bit off the subject for here maybe Steve will put it into a new post some where
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hi all what about a good pulse generator with 60Ghz yes 5G tech and it will make a gun obsolete do you like that the now have made it possible for any one to do just that
just use the off the shelf equipment now available to make nice pulse weapons is any one interested ?
it is a bit off the subject for here maybe Steve will put it into a new post some where
I like pulses. But I mean real pulses, not just a momentary impulse from an rf circuit. The nice thing about a power pulse is that a bed of ions will cushion the pulse. A small number of ions, as in a spark, will be swept up then pushed outwards by the pulse, As long as the pulse is longitudinal, it will stretch a spark way out. No wires on that Taser.
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hi all what about a good pulse generator with 60Ghz yes 5G tech and it will make a gun obsolete do you like that the now have made it possible for any one to do just that
just use the off the shelf equipment now available to make nice pulse weapons is any one interested ?
it is a bit off the subject for here maybe Steve will put it into a new post some where
Whats wrong with bullets, Aussepom? ;D
Can you explain what kind of damage a pulse weapon can do?
Steve
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It's been a few years since Freescale Electronics came out with their full surface amplifier chip, which was touted as a LV replacement for a Magnetron. (12V - 40VDC). So I recently did a search for low power miniature Micro Wave Ovens. About the best thing I found was a little cabinet with around six cell phone antennas. You could open the little door and take out a cup of hot coffee, but it took a while.
Cell phone signals crossing at a certain angle can set off a blasting cap. You don't always need 400 Watts of hot rf, heated by dual phases passing through each other. However, off the shelf 5G equipment operates in a very high part of the spectrum which is heavily regulated.
The other option, 4G, works in a frequency which has recently been opened up for unlicensed amateur experimentation. (I think it's between 4 and 4.5 GHz). But even with the Freescale chip, you'd still need a heavy bifilar inductor to split the phase, with an appropriate ratio between perpendicular lengths of the wire on adjacent sides of this coil.
Or use the Simple Pulse Generator to produce two frequencies, by soldering the edge of a smaller disc to the edge of a larger disk. The higher frequency would come out first, then the faster lower frequency would sweep it up. (Static Sweep). The pulse can condense and accelerate the static. The focal length is determined by the wire-length frequency offset. Closely set frequencies require a longer distance to condense.
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Smoke cumin, for your safety and mine. A puff a day for two or three days. Also, the tea is a mouthwash, nasal spray and eye drops for sneezing.